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2017 Mercedes-Benz C-Class problems, recalls and owner complaints
What the 2017 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
- 253owner complaints
- 12crash reports
- 3fire reports
- 16%fail the UK MOT
253 complaints, against an average of 183 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 2017 Mercedes-Benz C-Class?
The components named most often in the 253 owner complaints. One complaint can name several, so the shares can add up to more than 100%.
What symptoms do 2017 Mercedes-Benz C-Class owners describe?
Found by reading the text of all 253 owner complaints. Tap a symptom for the answer, a real owner quote and any related recall.
- Why is the check engine light on in my 2017 Mercedes-Benz C-Class?32 owners · 12.6%
- Why does the seat belt not latch or retract properly in my 2017 Mercedes-Benz C-Class?22 owners · 8.7%
- Why does my 2017 Mercedes-Benz C-Class smell of fuel or gas?19 owners · 7.5%
- Can the sunroof on the 2017 Mercedes-Benz C-Class shatter or fail?12 owners · 4.7%
- Why does my 2017 Mercedes-Benz C-Class stall, lose power or shut off while driving?10 owners · 4%
Has the 2017 Mercedes-Benz C-Class been recalled?
NHTSA lists no safety recalls for the 2017 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 2017 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 DVSAOn affected vehicles the aluminium bolts of the steering gear could corrode and break due to the intrusion of moisture.
Risk: On affected vehicles the aluminium bolts of the steering gear could corrode and break due to the intrusion of moisture.
Fix: Replace the steering gear mounting bolts on the affected vehicles with steel bolts. Should the bolts break or already be broken change the steering gear.
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 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 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 engine control unit software nay not meet specifications
Risk: The engine control unit software might not meet the specifications.
Fix: Update the diesel engine control unit software 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 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 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 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 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 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 be checked to ensure there is 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 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 DVSAFront seat belt tensioners may not function
Risk: The front seatbelt pre-tensioner ignitors may not perform as expected. This could increase the risk of injury to the seat occupants. The lock function of the seatbelts is not impaired.
Fix: On affected vehicles replace seatbelts with quality assured units.
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 DVSARight front seat belt pre-tensioner may not meet specification
Risk: The right front seat belt pretensioner may not conform to specification . This may adversely affect it's operation in the event of an accident.
Fix: Replace the pretensioner on affected vehicles.
UK DVSALeft front seat belt pre-tensioner may not meet specification
Risk: The propellant mix in certain seatbelt pre-tensioners ignitors may be incorrect. If the front seatbelt pre-tensioners are deployed the lock function of the pre-tensioners cannot be guaranteed.
Fix: Recall the vehicles that are likely to be affected and replace the front seatbelts that are likely to be affected.
UK DVSAStarting current limiter may overload
Risk: Where the car incurs severe engine damage resulting in the engine failing to turn over (engine seizure) and if the driver repeatedly attempts to start the engine despite the engine not cranking the very high electrical current could lead to overheating of the starting current limiter and the potential for a fire.
Fix: Recall the vehicles that are likely to be affected and install an additional fuse in the electrical line to the starter.
UK DVSAElectric power steering motor defective
Risk: Contacts inside the electric power steering motor may not have been correctly formed. Failure of these contacts would cause the loss of power steering assistance.If this happens a warning lamp will illuminate
Fix: Replace the electric power steering motor on affected vehicles.
UK DVSAFaulty control unit may cause vehicle to perform outside specification
Risk: Where a control unit coding was updated in a workshop between 3 December 2016 and 5 December 2016 the coding may not correspond to the specification and may trigger unplanned action in the vehicle. The safety and emissions systems may not react as design intent.
Fix: Recall the vehicles that are likely to be affected and update the software in the corresponding control units.
UK DVSALoss of power steering supportYears estimated
Risk: It has been identified that the pins within the electric power assisted steering control unit may not have been contact welded correctly. This can result in an open circuit which will lead to a loss of power steering assistance and possible loss of control of the vehicle.
Fix: Recall all affected vehicles and replace electric power assisted steering.
EU Safety GateThe three aluminium screws of the steering box may corrode due to exposure to spray water and aggressive road-grit (salt) used for melting…The three aluminium screws of the steering box may corrode due to exposure to spray water and aggressive road-grit (salt) used for melting ice. Advanced corrosion could weaken the screws, leading to potential breakage during manoeuvring or parking. If all fixing screws fail, the power-assisted steering could detach, resulting in a loss of power steering and an increased 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 aluminium bolts of the steering box may break.This can lead to detachment of the steering box from the power block, creating a 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 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 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 GateThe driver and passenger airbags of the company Takata in vehicles with ammonium nitrate gas generators without drying agents could, under…The driver and passenger airbags of the company Takata in vehicles with ammonium nitrate gas generators without drying agents could, under certain climate conditions, lead over time to a chemical change in the fuel.In the event of an accident triggering the release of the driver or passenger airbag, this change could cause the gas generators to burst. If a gas generator ruptures, the airbag would then have no restraining function and loose parts from the gas generator could reach the vehicle interior. This would increase the risk of injury for passengers.
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 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 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 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 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 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
EU Safety GateThe starter current limiter may be overloaded and overheat.As a consequence, the surrounding components could ignite, leading to a 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: 01/09/2017
EU Safety GateThe propellant mixing ratio in certain seat-belt pre-tensioner igniters may be incorrect.As a result, in the event of an accident where the front seat-belt pre-tensioners are activated, the pre-tensioners would not provide the restraint performance required if the igniter did not ignite as intended. This could put the occupants at a greater risk of injury.
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 GateFollowing the update of the control unit coding, the coding parameters of the control unit could be defective.This could give rise to various unplanned reactions in the vehicle: the wrong airbag could be triggered in the event of an accident, the airbag control unit may not recognise the belt buckle status, the engine control unit could be coded with a false maximum speed or various assistance systems may not function.
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 2017 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 2017, 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 2017 Mercedes-Benz C-Class owners report?
12 of the 253 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.
2017 Mercedes c300 the switchover valve in the diagnostic module of the evaporative emission control system is jammed open. This issue was called for recall for models 2018 or later, but 2017 was not part of it.
The contact owns a 2017 Mercedes-Benz C300. While driving at approximately 15 mph, the contact observed smoke emanating from under the hood. The vehicle was driven to her work location and parked. Upon exiting the vehicle and opening the hood, she observed orange flames coming from the engine compartment. A parking attendant extinguished the fire, and a police and/or fire report was filed. The vehicle was towed to a dealer and diagnosed with a fuel line leak that caused the engine harness to come apart. The leaking fuel hose from the high-pressure fuel pump caused damage to the high-pressure…
strong evident fuel/ gas smell when driving and when the car is in park after driving.
Check engine light for P052E which has been coming and going off for years now. Now the check engine light is there permanently. I spoke to Mercedes Benz customer service and requested for them to fix the problem now that the light is on permanently but they refuse to fix it because the car has 222,000 miles on it. This should be a recall from the manufacturer not an extended warranty coverage. The Mercedes dealer in Valencia California told me they now only do a software update and put a plug cap on the sensor and want to charge me $850 even though this should be a recall
UNKNOWN it was just one day I started my car and turned the A/C on and I started getting this strong gasoline smell. I went on like a saw there is a recall for this problem for the M274 engines.
While driving home from work, without any warning or blunt force the sunroof exploded and shattered glass was everywhere
Case already called in 11699173 - Stuck Seatbelt in B Pillar of 2017 Mercedes Benz 2 door hard top coupe. Seat belt will not come out of A pillar rendering seatbelt totally inoperable This VIN comes up negative under recall 21V03200 Case filed with MBUSA 18991593 still unresolved. Dealership is claiming a 2,200 Seatbelt Assembly is needed. now warning lights. The seatbelt was " lazy " and didn't smoothly retract prior to this incident when parked, door closed, the belt retracted with a loud motorized noise and now will not retract at all from A Pillar - Please follow up with on this Case #…
The contact owns a 2017 Mercedes-Benz C300. The contact stated that upon arriving at his destination and exiting the vehicle, the driver’s side seat belt retracted and became stuck in the retracted position. As a result, the contact was unable to use the driver's side seat belt. No warning lights were illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the seat belt assembly. The vehicle was not repaired. After investigating the failure, the contact related the failure to NHTSA Campaign Number: 21V032000 (Seat Belts), but the VIN was not included. The manufacturer…
I am reporting a serious vehicle safety hazard caused by improper and unsafe repair work performed by USA Platinum Motor, located at 1221 California Lane #126B, Arlington, TX. I brought my 2017 Mercedes-Benz C300 in for a cold start rattle with no warning lights or prior issues. The shop diagnosed a loose timing chain and I authorized the repair. After the repairs, the vehicle was returned with critical safety defects, including a loose fuel pump, unsecured fuel line, missing bolts, and improperly reassembled engine components. Shortly after pickup, the car experienced loss of acceleration on…
In October 2024, the rear subframe was replaced due to rust perforation in the area of the suspension arm mounting bracket. I had no warning. The car was in for routine service at Mercedes Benz of New London. It had rusted from the inside out and was considered unsafe to drive by the Mercedes service advisor. I could have had a serious accident! I had no choice but to replace the subframe as it is my only vehicle. Shockingly I learned many others have had this issue with various Mercedes models/years and that Mercedes Benz knows of this serious safety problem and there is a class action…
PVC VALVE CODE. P052E Mercedes should fix this!
The contact owns a 2017 Mercedes-Benz C300. The contact stated that while starting and driving the vehicle, the electric power steering was inoperable. There were no warning lights illuminated. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was contacted, but no assistance was provided. The contact stated that the failure was related to NHTSA Campaign Number: 17V243000 (Steering). The failure mileage was approximately 25,000.
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2017 Mercedes-Benz C-Class: questions owners ask
Is the 2017 Mercedes-Benz C-Class reliable?
NHTSA data alone cannot rate reliability, but it shows what owners reported. Owners filed 253 complaints with NHTSA about the 2017 Mercedes-Benz C-Class; the most common categories were engine (83, 32.8%), electrical system (35, 13.8%), fuel/propulsion system (32, 12.6%). There are no safety recalls listed for this model year. 12 complaints mention a crash, 3 mention a fire, 17 injuries were reported.
What are the most common problems with the 2017 Mercedes-Benz C-Class?
Across 253 owner complaints filed with NHTSA, the categories mentioned most often are engine (32.8% of complaints), electrical system (13.8% of complaints), fuel/propulsion system (12.6% of complaints), seat belts (10.3% of complaints), structure (10.3% of complaints). One complaint can name several components.
Does the 2017 Mercedes-Benz C-Class have any recalls?
As of October 2026, NHTSA lists no safety recalls for the 2017 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 2017 Mercedes-Benz C-Class?
32 of the 253 owner complaints NHTSA has on file for the 2017 Mercedes-Benz C-Class (12.6%) describe the check engine light coming on. One owner wrote: "Check engine light for P052E which has been coming and going off for years now. Now the check engine light is there permanently." (NHTSA complaint 11725960, March 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.
Why does the seat belt not latch or retract properly in my 2017 Mercedes-Benz C-Class?
22 of the 253 owner complaints NHTSA has on file for the 2017 Mercedes-Benz C-Class (8.7%) describe seat belts not latching, retracting or locking. One owner wrote: "Case already called in 11699173 - Stuck Seatbelt in B Pillar of 2017 Mercedes Benz 2 door hard top coupe. Seat belt will not come out of A pillar rendering seatbelt totally inoperable This VIN comes up negative under recall 21V03200 Case filed with MBUSA…" (NHTSA complaint 11701042, November 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 my 2017 Mercedes-Benz C-Class smell of fuel or gas?
19 of the 253 owner complaints NHTSA has on file for the 2017 Mercedes-Benz C-Class (7.5%) describe a fuel or gasoline smell, or a fuel leak. One owner wrote: "UNKNOWN it was just one day I started my car and turned the A/C on and I started getting this strong gasoline smell. I went on like a saw there is a recall for this problem for the M274 engines." (NHTSA complaint 11708103, December 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.
Can the sunroof on the 2017 Mercedes-Benz C-Class shatter or fail?
12 of the 253 owner complaints NHTSA has on file for the 2017 Mercedes-Benz C-Class (4.7%) describe the sunroof or panoramic roof shattering, exploding or failing. One owner wrote: "While driving home from work, without any warning or blunt force the sunroof exploded and shattered glass was everywhere" (NHTSA complaint 11705275, December 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 my 2017 Mercedes-Benz C-Class stall, lose power or shut off while driving?
10 of the 253 owner complaints NHTSA has on file for the 2017 Mercedes-Benz C-Class (4%) describe the engine stalling, losing power or shutting off while driving. One owner wrote: "My car suddenly turned off at a stop sign. After I restarted it, it turned back on and my engine light turned on. I called the dealership and after inspection I was told that the valve for my crankcase was malfunctioning." (NHTSA complaint 11499457, December 2022). 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 2017 only; combines NHTSA's entries for C-CLASS and C-CLASS HYBRID.