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Car problem report
2018 Mercedes-Benz C-Class problems, recalls and owner complaints
What the 2018 Mercedes-Benz C-Class has been recalled for, how often it fails the UK MOT and what owners report, from official government data. Updated October 25, 2026.
- 0safety recalls
- 130owner complaints
- 5crash reports
- 0fire reports
- 14%fail the UK MOT
130 complaints, against an average of 192 for the other 14 Mercedes-Benz C-Class model years.
Every Mercedes-Benz C-Class model year with its number of owner complaints. Pick a year to compare.
What goes wrong with the 2018 Mercedes-Benz C-Class?
The components named most often in the 130 owner complaints. One complaint can name several, so the shares can add up to more than 100%.
What symptoms do 2018 Mercedes-Benz C-Class owners describe?
Found by reading the text of all 130 owner complaints. Tap a symptom for the answer, a real owner quote and any related recall.
Has the 2018 Mercedes-Benz C-Class been recalled?
NHTSA lists no safety recalls for the 2018 Mercedes-Benz C-Class as of October 25, 2026. Recalls can be issued at any time, so check your VIN before you rely on this.
Is the 2018 Mercedes-Benz C-Class recalled in the UK or Europe?
Recalls issued by the UK's DVSA and through the EU's Safety Gate system that cover this model and build period. European models can differ from U.S. ones, and "years estimated" means the recall gave no build dates, so confirm your own car with your registration or VIN.
UK DVSAOn affected vehicles the panel located between the windshield and the panoramic sunroof might not have been bonded correctly during a…On affected vehicles the panel located between the windshield and the panoramic sunroof might not have been bonded correctly during a prior service repair.
Risk: On affected vehicles the panel located between the windshield and the panoramic sunroof might not have been bonded correctly during a prior service repair.
Fix: Check the front fixed element of the panoramic sliding sunroof and replace if necessary.
UK DVSAIndividual bolts or chain links of the camshaft timing chain might wear
Risk: Individual bolts or chain links of the camshaft timing chain might wear in case of a long term operation under specific driving conditions.
Fix: Replace the camshaft timing chain on the affected vehicles
UK DVSAA particle in the fuel rail might lead to a leak between the fuel rail and the injector
Risk: A particle in the fuel rail might lead to a leak between the fuel rail and the fuel injector.
Fix: Replace the fuel rail and fuel injectors on the affected vehicles.
UK DVSAOn certain vehicles the routing of an electric cable in the engine compartment might not meet specifications
Risk: On certain vehicles the routing of an electric cable in the engine compartment might not meet specifications.
Fix: Check the cable routing on the affected vehicles and correct it if necessary.
UK DVSACoolant pump might have a leakage between the vacuum system and the coolant circuit
Risk: On certain vehicles with a Diesel engine the coolant pump which is controlled by vacuum might have a leakage between the vacuum system and the coolant circuit.
Fix: Update the software of the coolant pump and replace the electrical switch valve on the affected vehicles.
UK DVSAThe behaviour of the emergency call system might not meet specifications
Risk: The behaviour of the emergency call system might not meet specifications.
Fix: Update the software of the communication module for the emergency call system.
UK DVSAThe behaviour of the emergency call system might not meet specifications
Risk: The behaviour of the emergency call system might not meet specifications.
Fix: Update the software of the communication module for the emergency call system.
UK DVSAThe behaviour of the emergency call system might not meet specifications
Risk: The behaviour of the emergency call system might not meet specifications.
Fix: Update the software of the communication module for the emergency call system.
UK DVSAThe behaviour of the emergency call system might not meet specifications
Risk: The behaviour of the emergency call system might not meet specifications.
Fix: Update the software of the communication module for the emergency call system.
UK DVSAVehicles with a panoramic sunroofthe polycarbonate panel may not have been bonded correctly during a prior service repair
Risk: The polycarbonate panel located between the windshield and the panoramic sunroof may not have been bonded correctly during a prior service repair.
Fix: Remove the bonded panel and install a new polycarbonate panel if required.
UK DVSADiodes on the rectifier bridge of the alternator might fail
Risk: Diodes on the rectifier bridge of the alternator might fail.
Fix: Update the engine control unit software with an optimised alternator control strategy on the affected vehicles.
UK DVSAThe behaviour of the emergency call system might not meet specifications
Risk: The behaviour of the emergency call system might not meet specifications.
Fix: Update the software of the communication module for the emergency call system.
UK DVSAThe behaviour of the emergency call system might not meet specifications
Risk: The behaviour of the emergency call system might not meet specifications.
Fix: Update the software of the communication module for the emergency call system.
UK DVSAThe behaviour of the emergency call system might not meet specifications
Risk: The behaviour of the emergency call system might not meet specifications.
Fix: Update the software of the communication module for the emergency call system.
UK DVSAThe connection of the gas lines of the inertisation system might not meet specifications
Risk: The connection of the gas lines of the inertisation system might not meet specifications.
Fix: Check and if necessary rework the gas lines of the inertisation system.
UK DVSAThe emergency call system might not meet specifications
Risk: The behaviour of the emergency call system might not meet specifications.
Fix: Update the software of the communication module for the emergency call system.
UK DVSAThe behaviour of the emergency call system might not meet specifications
Risk: The behaviour of the emergency call system might not meet specifications.
Fix: Update the software of the communication module for the emergency call system.
UK DVSAThe behaviour of the emergency call system might not meet specifications
Risk: The behaviour of the emergency call system might not meet specifications.
Fix: Update the software of the communication module for the emergency call system.
UK DVSAThe emergency call system might not meet specifications
Risk: The behaviour of the emergency call system might not meet specifications.
Fix: Update the software of the communication module for the emergency call system.
UK DVSAThe behaviour of the emergency call system might not meet specifications
Risk: The behaviour of the emergency call system might not meet specifications.
Fix: Update the software of the communication module for the emergency call system.
UK DVSAThe communication module may be deactivated
Risk: The communication module may be deactivated
Fix: Carry out a check of the configuration of the communication module on affected vehicles and if necessary activate the communication module.
UK DVSAThe software of certain communication modules may not meet specifications
Risk: The software of certain communication modules may not meet specifications.
Fix: Carry out an update to the software of the communication module on affected vehicles.
UK DVSAThe high voltage wiring harness shield may not permanently withstand the electrical loads that are induced under certain driving profiles
Risk: The shield for the high-voltage wiring harness may not permanently withstand the electrical loads that are induced under certain driving profiles
Fix: Replace the high-voltage wiring harness on the affected vehicles
UK DVSAThe headlight adjustment may not meet the specification
Risk: The headlight adjustment might not meet the specification
Fix: Check the headlight adjustment on the affected vehicles and correct it if necessary.
UK DVSAThe software of the esp control unit may not meet the specifications
Risk: The software of the ESP control unit might not meet the specifications.
Fix: Update the software for the ESP control unit on the affected vehicles.
UK DVSAThe emergency call system (ecall) does not meet the specification
Risk: On affected vehicles the software of the communication module for the emergency call system does not meet the specification
Fix: Update the software of the communication module for the emergency call system
UK DVSAThe seat belt warning function does not meet the specification
Risk: The seat belt warning function does not meet the specification
Fix: Activate the correct seat belt warning scenario in the instrument cluster
UK DVSAEngine control unit software to be updated
Risk: Improve the vehicle emissions via software updates.
Fix: Update the relevant control unit's software and if necessary replace the NOx sensors.
UK DVSAThe data documenting the correct mounting of the turbocharger oil feed as well as the oil return line may be missing
Risk: The HV battery pack can overheat and result in the venting of hot gas which can ignite vehicle components or in extreme cases the entire vehicle.
Fix: To prevent a vehicle fire the vehicles should not be charged using the external charging cable and the vehicles should only be driven using the default Auto EV mode only
UK DVSACertain front seat belt buckles may not have been manufactured according to specification
Risk: A correctly fastened seat belt could be detected as not fastened impairing the restraint system
Fix: Check the relevant seat belt buckles in the affected vehicles and replace if necessary
UK DVSAThe dimension of the brake discs on the front axle may be too small
Risk: The dimension of the brake discs installed on the front axle might be too small.
Fix: Replace the brake discs on the affected vehicles.
UK DVSAThe software of the radar control unit may not meet specification
Risk: ; The software of the radar control unit might not meet the specification
Fix: Update the software of the radar sensor control unit on the affected vehicles.
UK DVSAThe mounting bolts of the turbocharger oil return line and the crank case ventilation line might have been interchanged
Risk: The mounting bolts of the turbocharger oil return line might have been interchanged
Fix: Replace the mounting bolts
UK DVSASoftware update to improve emissions
Risk: Improve the vehicle emissions via software updates.
Fix: Update the diesel engine control unit software and add a supplementary booklet for the operator's manual.
UK DVSAAn internal sensor within the electric power steering unit may not have been manufactured to specifications
Risk: An internal sensor within the electric power steering unit might not have been manufactured according to specifications.
Fix: The affected vehicles are to have the steering unit replaced.
UK DVSASwitches in certain seat belt buckles may not have been manufactured to specifications
Risk: The switches in certain seat belt buckles might not have been manufactured according to specifications.
Fix: The affected seat belt buckles are to be replaced.
UK DVSAA reset in the cpc control unit could occur whilst driving
Risk: The ECO Start-Stop function may be disabled and cause the vehicle to stall.
Fix: The affected vehicles are to be recalled and the software updated.
UK DVSAA lock nut may be cracked in the steering gear
Risk: A lock nut may be cracked in the steering gear.
Fix: The electric power steering is to be checked and if necessary replaced.
UK DVSAA lock nut may be cracked in the steering gear
Risk: A lock nut may be cracked in the steering gear.
Fix: The electric power steering is to be checked and if necessary replaced.
UK DVSAThe electronic stability program control unit software may not match the current specification
Risk: The ESP control unit may not be initialised as intended during the start-up process.
Fix: The affected vehicles are to be recalled and ESP control unit software updated.
UK DVSAThe status of the front passenger airbags displayed in the centre console might not be indicated correctly
Risk: The status of the front passenger airbags displayed in the centre console might not be indicated correctly.
Fix: The affected vehicles head unit software will be updated
UK DVSAThe lock status of the steering coupling was not correctly documented
Risk: The lock status of the steering coupling was not correctly documented following assembly.
Fix: As a precautionary measure on affected vehicles the lock status of the steering coupling will be determined and reworked if necessary.
UK DVSATo improve emissions of the affected vehicles.certain calibrations of functionalities must be changed in the engine management
Risk: Improve the vehicle emissions via software updates.
Fix: Update the diesel engine control unit software and add a supplementary booklet for the operator's manual
UK DVSAAn electric line in the engine compartment may have been routed outside of the specification
Risk: An electric line in the engine compartment may have been routed outside of the specification.
Fix: Check the routing of the wiring harness at the prefuse box in the engine compartment and correct if necessary.
UK DVSABonding of the rear beltline trim strips may not be to specification
Risk: Bonding of the rear beltline trim strips may not correspond to the specifications.
Fix: Check the trim strips of the affected vehicles and replace them if necessary.
UK DVSAIncorrect underfloor panelling installed
Risk: Incorrect engine undertray fitted.
Fix: Check and replace engine undertray on affected vehicles.
UK DVSALaser welding between backrest rail and backrest metal fitting of front seats may not meet specification
Risk: It has been determined that on certain C-Class (205) and E-Class (213) Cars with AMG performance seats the laser welding between the backrest rail and the backrest metal fitting of the driver or passenger seat might not meet the specification. The laser welding between the backrest member and the backrest metal fitting may not withstand the required load values. As a result the fitting may detach from the backrest member. In the case of an accident this could result in a higher occupant load. Due to the delivery scenario the fault can only occur on one side of the seat.
Fix: As a precautionary measure recall the affected vehicles and check the backrest member and replace if necessary
UK DVSADriver's airbag gas generator housing failure during deployment
Risk: On affected vehicles it has been determined that drivers airbags with potentially faulty gas generator housing material may have been installed in vehicles of model series 156 176 246 205 238 & 253. If the material of the gas generator housing fails during airbag deployment in the event of a crash the airbag system would possibly no longer have a restraint effect. In addition separating parts could enter the passenger compartment. This could lead to an increased risk of injury.
Fix: On affected vehicles replace the driver's airbag
UK DVSAIncorrect software specification for the steering column switch module
Risk: Software of switch module incorrect specification
Fix: Update software of affected vehicles
UK DVSARight side of front seat backrests may not lock into place
Risk: The seat backrests on the right side of the front seats in the c-class Coupe/Convertible and E-Class Coupe/Convertible may not fully lock.
Fix: As a precautionary measure the lock of the seat backrest on affected vehicles will be check for operation. Where necessary the backrest will be replaced.
UK DVSAElectrical wiring in steering assembly may be insufficiently grounded
Risk: The steering column clock spring may break. This will cause warning messages to illuminate in the instrument cluster but in extreme instances it may cause the driver's airbag to deploy.
Fix: Affected vehicles will be recalled to establish sufficient grounding of the steering components
UK DVSAAirbag control unit connection may not be manufactured to specificationYears estimated
Risk: The connector pins of the occupant classification system to the airbag control unit might have been manufactured outside specification. After a period of time this may cause decativation of the passnger airbag.
Fix: On affected vehicles replace the connector pins of the occupant classification system.
UK DVSASteering components may be insufficiently grounded
Risk: It has been determined that the steering airbag electrical components are insufficiently grounded. Failure of the steering column module clock spring could result in an inadvertent deployment of the driver airbag which may cause risk of injury to the driver and an increased risk of a potential collision.
Fix: On affected vehicles the manufacturer will fit a contact bridge to the outer race of the steering column top bearing which will provide correct grounding.
UK DVSAElectrical wiring in steering assembly may be insufficiently grounded
Risk: The steering column clock spring may break. This will cause warning messages to illuminate in the instrument cluster but in extreme instances it may cause the driver's airbag to deploy.
Fix: Affected vehicles will be recalled to establish sufficient grounding of the steering components.
UK DVSAElectrical wiring in steering assembly may be insufficiently grounded
Risk: The steering column clock spring may break. This will cause warning messages to illuminate in the instrument cluster but in extreme instances it may cause the driver's airbag to deploy.
Fix: Affected vehicles will be recalled to establish sufficient grounding of the steering components.
UK DVSAElectrical wiring in steering assembly may be insufficiently grounded
Risk: The steering column clock spring may break. This will cause warning messages to illuminate in the instrument cluster but in extreme instances it may cause the driver's airbag to deploy.
Fix: Affected vehicles will be recalled to establish sufficient grounding of the steering components.
UK DVSAElectrical wiring in steering assembly may be insufficiently grounded
Risk: The steering column clock spring may break. This will cause warning messages to illuminate in the instrument cluster but in extreme instances it may cause the driver's airbag to deploy.
Fix: Affected vehicles will be recalled to establish sufficient grounding of the steering components.
EU Safety GateThe vacuum-controlled coolant pump may not be tightly sealed between the coolant and vacuum circuits.This may result in the coolant leaking into the vacuum circuit leading to an electrochemical reaction, increasing the risk of fire.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateA trapped particle may damage the sealing between the fuel rail and fuel injector, which could cause fuel to leak into the engine…A trapped particle may damage the sealing between the fuel rail and fuel injector, which could cause fuel to leak into the engine compartment. Consequently, leaking fuel may come into contact with hot parts of the engine, increasing the risk of fire.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateIn certain GLE/GLS (BR 167) and C-class vehicles, the seats might be constructed incomplete or with unintended trim, increasing the risk…In certain GLE/GLS (BR 167) and C-class vehicles, the seats might be constructed incomplete or with unintended trim, increasing the risk of injury in the event of an accident.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateThe belt tensioner arm may have been manufactured with a borderline tolerance, which could cause one side of the V-ribbed belt to rub…The belt tensioner arm may have been manufactured with a borderline tolerance, which could cause one side of the V-ribbed belt to rub against the belt tensioner, causing it to fail. As a result, the coolant pump may stop working, causing the engine to overheat, thus compromising the impermeability of the oil sump. Consequently, oil may leak onto the road, posing a risk to the following traffic.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateThe polycarbonate roof panel located between the windscreen and the panoramic roof may not have been bonded correctly to the vehicle…The polycarbonate roof panel located between the windscreen and the panoramic roof may not have been bonded correctly to the vehicle during a prior repair. In such cases, the adhesive bonding could gradually deteriorate and the panel could become detached from the vehicle, posing a risk to other road users.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateFaulty connection of the inerting system’s gas pipes could impair the intended distribution of argon shielding gas to the points where…Faulty connection of the inerting system’s gas pipes could impair the intended distribution of argon shielding gas to the points where there could be contact between the leaking refrigerant R1234yf and hot engine components in the event of an accident.This would reduce the cooling effect of the inerting gas, leading to increased risk of fire.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateThe maximum permissible operating temperature of individual diodes on the alternator rectifier bridge could be exceeded and the diodes…The maximum permissible operating temperature of individual diodes on the alternator rectifier bridge could be exceeded and the diodes could subsequently fail. Consequently, an improper flow of current from the on-board electrical system battery through the alternator to the vehicle earth could occur.As a result, the windings in the alternator stator could be heated to such an extent that an outbreak of fire cannot be ruled out.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateDue to the lack of documentation, there is no confirmation that the screw connections of the turbocharger’s oil-supply and oil-return…Due to the lack of documentation, there is no confirmation that the screw connections of the turbocharger’s oil-supply and oil-return pipes were correctly executed during the assembly process. In the event of a loose screw connection, oil might leak at the oil-supply and/or oil-return pipe of the turbocharger.The leaking oil might then come into contact with hot components, increasing the risk of fire.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateThe ESP control unit software does not comply with the specifications and may not be able to adapt to the type of brakes installed.This can cause the ESP system to be unable to respond as intended to a possible drift of the yaw rate sensor or to a failure of the brake vacuum supply. As a result, the ESP intervention may be inappropriate to the driving situation, increasing the risk of an accident.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateThe brake discs installed on the front axle may be too small (in diameter and thickness) and would not sit symmetrically in the brake…The brake discs installed on the front axle may be too small (in diameter and thickness) and would not sit symmetrically in the brake calliper. As a result, the brake lining can wear out and a gap between the piston and the sealing ring can be formed, allowing brake fluid to leak out.This will impair the braking performance, increasing the risk of an accident.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateThe fixing screw connecting the base holder of the manual control device may not be correctly fitted.This can impair the control over the vehicle, increasing the risk of an accident.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateThe bolts which connect the cross-member of the trailer coupling device (towbar) to the vehicle may not have been tightened with the…The bolts which connect the cross-member of the trailer coupling device (towbar) to the vehicle may not have been tightened with the correct torque. As a result, the cross-member and the trailer could be completely detached from the vehicle, endangering the following traffic and increasing the risk of an accident.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateThe fixing screws for the turbocharger oil return line and the crankcase breather pipe may have been interchanged.Due to a screw being too long, the pre-tensioning force of the screw connection may be insufficient and oil could leak from the turbocharger oil return line. As a result, oil could come into contact with hot components, increasing the risk of fire.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateThe sleep mode functionality of the electronic parking brake within the electronic stability programme (ESP) software may be defective.As a result, the brake lights may be permanently activated or the ESP function could be deactivated, increasing the risk of an accident.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateThe sensors in some seatbelt locks may not have been adequately manufactured.Consequently, they might not detect a correctly fastened seatbelt and thus not activate the pre-tensioner systems (electric and pyrotechnic). In the event of an accident, these might not work leading to a limited restraint capacity and increasing the risk of injury to the occupants.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateIn vehicles with rear-wheel drive, a lock nut in the steering gear may be cracked.Consequently, when the steering is placed under high forces it could break, which would block the steering gear and increase the risk of accident.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateA defective sensor installed within the electrical power steering system may lead to deactivation of the power steering assistance.As a consequence, there is an increased risk of accidents.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateIn vehicles with automatic child-seat detection, the status shown in the centre console of the passenger airbags may not be correctly…In vehicles with automatic child-seat detection, the status shown in the centre console of the passenger airbags may not be correctly indicated. In this case, the vehicle users would not be correctly informed of the actual activation status of the passenger airbag and may not react appropriately to a potentially false passenger classification, thereby increasing the risk of injury for passengers in the event of an accident.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateThere may be cracks in a securing nut in the steering gear of rear-wheel-drive vehicles.The nut could consequently break if the steering system is subject to a very high lateral force, which could result in rotating parts in the steering gear affecting the casing and thereby blocking the steering system.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateThe steering wheel may not be correctly connected with the steering gearbox.This could lead to loss of steering of the vehicle increasing the risk of accident.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateThe lower engine compartment cover lacks the necessary left-hand gap for the exhaust system.As a result, the exhaust system temperatures resulting from operation at full load could lead to the cover catching fire.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateThe decorative strips on the rear waist finisher have not been glued on correctly.As a consequence they can detach, fall into the road, increasing the risk of accident of the following traffic.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateThe seat-backs may not be fully secured on the right-hand side of the front seats.In the event of an accident, any unsecured objects on the rear seats of the vehicle may not be restrained, thereby increasing the risk of injury to passengers in the front seats.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateThe casing material of the gas generator of the driver airbag may be defective.In the event that the airbag is deployed, the airbag may not protect the driver and detached parts might enter the passenger compartment causing injury to the vehicle occupants.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateThe welding of the backrests of the driver's and front passenger's seats may be defective.In the event of an accident, the welding could break, increasing the risk of injury to the occupant of the seat in question.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateThe steering column is not sufficiently earthed.As a result, in the event of an electrostatic discharge, the driver's airbag may be triggered when not required. This could cause an accident.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
How often does the 2018 Mercedes-Benz C-Class fail its MOT?
Why they failed: the share of failed tests with at least one fault in each area (a test can fail on several). Cars first registered in 2018, tested in Great Britain in 2023; first registration is usually, but not always, the model year. Source: DVSA anonymised MOT tests and results, Open Government Licence v3.0.
What do 2018 Mercedes-Benz C-Class owners report?
12 of the 130 complaints, the most recent for the most-reported components, as the owners wrote them. NHTSA removes names and VINs; long reports are trimmed. CarHooq has not verified individual claims.
Front roof panel came detached at hwy speed
The contact owns a 2018 Mercedes-Benz C-300. The contact stated that while driving 70 MPH South on the interstate towards Miami, the front panel detached without warning. The contact pulled over to inspect the vehicle and became aware that the panel between the windshield and sunroof had detached. The contact stated that water started entering the vehicle from several areas. The sunroof was inoperable. The contact called the insurance company. The contact associated the failure with NHTSA Campaign Number: 23V854000 (Structure). The local dealer was contacted. The vehicle was not diagnosed or…
Check engine light comes on, Error Code P052E, after a lot of research, this is a known defective part by Benz. Huge safety issue not addressed by them. Very costly to fix for a customer. There is a new and improved replacement part from Benz indicating they are aware of the faulty old parts that are currently in those cars but yet they have failed to do a recall.
I have a 2018 Mercedes Benz c63 amg which I purchased new in 2018. I have only 61,230 miles yesterday 11/10/2025 it started making a loud noise coming from the right rear. I drove to the Mercedes dealership in Belmont,Ca the technician mechanic told me that the rear differential was bad and need to be replace. Cost $7,000. I don't understand only 61,230 miles why did it go out so soon I always had the maintenance done. My warranty has expired. I did some research and found that there was a recall for 2018 Mercedes Benz c63 amg related to the rear differential. The recall was issued due to…
My vehicle only had 31,000 miles and I experienced engine failure. I bought a new engine for 16, 500. 00 dollars. Mercedes Benz did nothing. I almost got in to several accidents because the engine completely stop on the interstate. Almost got hit by several cars. This is unacceptable.
The engine light is on with only 35000 miles. Upon using an OBD2 scanner, error code P052e positive crankcase ventilation(PCV) malfunction was detected. It's a problem that I researched and noticed a lot of people having the same issue. I was told that this can cause the car to stall or shut down? This causes serious risk and safety issues to drivers, passengers, and pedestrians. With so many complains about this problem, I believe the manufacturer and dealers should take responsibility before tragedies happen.
car has less than 34,000 miles on it. One day went to drive and the vehicle wouldn't turn and an error message popped up "power steering malfunction, check owners manual" Had it towed to dealer and they said they couldn't find anything wrong with it. According to the dealer, no sign of wear and tear, no physical damage,
The contact owns a 2018 Mercedes-Benz C300. While driving at various speeds, the contact could hear an abnormal sound from the transmission. The vehicle was taken to a local independent mechanic where it was diagnosed that the rack and pinion needed to be replaced. The vehicle was not repaired. The vehicle was then taken to a local dealer for diagnosis, but the failure could not be replicated. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 57,000.
I am wanting to add information to my original complaint. Tracking#11589822 When I called in the electrical issue to AAA the agent said this is a common problem on these cars. Next, I want to add photos the Mercedes of Fresno service department sent me during the 2nd time my car was taken in to be checked. I honestly don't remember off hand when the collision occurred, I have that paper work somewhere. I will find it and send it in also. I will also get paper work from the auto body place that fixed as much of the wiring that it could. There was also a video on line I will try to find again…
The contact owns a 2018 Mercedes-Benz C300. The contact stated that while driving at an undisclosed speed, there was a message was displayed that there was a light bulb malfunction. The contact stated that the rear turn signal lights and brake lights were not operating properly. Additionally, the contact stated that the fuel door failed to operate properly, and occasionally opened independently while driving. The vehicle was taken to a local dealer, where it was diagnosed and determined that the cause of the electrical issues was water in the spare tire compartment. The vehicle was not…
The contact owns a 2018 Mercedes-Benz C300. The contact stated that after starting the vehicle, the S.O.S. Not Active message displayed. The contact was concerned that in the event of an emergency, the emergency services function would be inoperable. The vehicle had previously been serviced under NHTSA Campaign Number: 21V058000 (Electrical System, Communication) however, the failure recurred. The dealer was made aware of the failure; however, the vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 85,000.
While driving in a curved onramp connecting from one street to another the vehicle experienced a complete loss of steering ability which resulted in the vehicle continuing to move straight, off the pavement, and into a wall. The vehicle bounced off of the wall and loss of steering ability continued and the vehicle could not be controlled, crossed the road, went over a guardrail, and down an embankment until it came to a stop (approx 100ft). The vehicle engine never turned off until it came to a stop at which point the vehicle was manually turned off. No airbags deployed. There were no warning…
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2018 Mercedes-Benz C-Class: questions owners ask
Is the 2018 Mercedes-Benz C-Class reliable?
NHTSA data alone cannot rate reliability, but it shows what owners reported. Owners filed 130 complaints with NHTSA about the 2018 Mercedes-Benz C-Class; the most common categories were engine (39, 30%), structure (19, 14.6%), steering (13, 10%). There are no safety recalls listed for this model year. 5 complaints mention a crash, 2 injuries were reported.
What are the most common problems with the 2018 Mercedes-Benz C-Class?
Across 130 owner complaints filed with NHTSA, the categories mentioned most often are engine (30% of complaints), structure (14.6% of complaints), steering (10% of complaints), electrical system (9.2% of complaints), fuel/propulsion system (6.9% of complaints). One complaint can name several components.
Does the 2018 Mercedes-Benz C-Class have any recalls?
As of October 2026, NHTSA lists no safety recalls for the 2018 Mercedes-Benz C-Class. Recalls can be issued at any time, so check your VIN at nhtsa.gov/recalls.
Why is the check engine light on in my 2018 Mercedes-Benz C-Class?
18 of the 130 owner complaints NHTSA has on file for the 2018 Mercedes-Benz C-Class (13.8%) describe the check engine light coming on. One owner wrote: "Check engine light comes on, Error Code P052E, after a lot of research, this is a known defective part by Benz. Huge safety issue not addressed by them. Very costly to fix for a customer." (NHTSA complaint 11709871, January 2026). If it happens to your car, check your VIN for open recalls at nhtsa.gov/recalls and report the problem to NHTSA; complaints are what trigger investigations.
Can the sunroof on the 2018 Mercedes-Benz C-Class shatter or fail?
5 of the 130 owner complaints NHTSA has on file for the 2018 Mercedes-Benz C-Class (3.8%) describe the sunroof or panoramic roof shattering, exploding or failing. One owner wrote: "I was driving around my neighborhood one day with my panoramic sunroof open and at the red light i wanted to close the sunroof (california summer sun is no joke) and it made this really big 'THUMP' noise, thought the sunroof glass cracked." (NHTSA complaint 11671664, July 2025). If it happens to your car, check your VIN for open recalls at nhtsa.gov/recalls and report the problem to NHTSA; complaints are what trigger investigations.
Why does water leak into my 2018 Mercedes-Benz C-Class?
4 of the 130 owner complaints NHTSA has on file for the 2018 Mercedes-Benz C-Class (3.1%) describe water leaks into the cabin, sunroof or trunk. One owner wrote: "There are Water intrusion that happened to other Model of Mercedes, my car have the same problem, when i bring it to the Mercedes dealer, they found a lot of water inside the trunk, but they insisted that I had accident, but there no accident that I know of." (NHTSA complaint 11570616, February 2024). If it happens to your car, check your VIN for open recalls at nhtsa.gov/recalls and report the problem to NHTSA; complaints are what trigger investigations.
Check your own C-Class
Counts are a starting point, not a verdict: popular models collect more complaints because more of them are on the road, and NHTSA does not verify individual reports. To see whether a recall is still open on your car, enter your VIN at nhtsa.gov/recalls (U.S.) or your registration at check-vehicle-recalls.service.gov.uk (UK). Had a safety problem? Report it to NHTSA; complaints are what trigger investigations and recalls.
Data: NHTSA Office of Defects Investigation recall and complaint databases (public domain), DVSA anonymised MOT results (Open Government Licence v3.0), DVSA vehicle recalls (Open Government Licence v3.0), EU Safety Gate alerts (© European Union), retrieved October 25, 2026. Model year 2018 only; combines NHTSA's entries for C-CLASS and C-CLASS PHEV.