Problem Lookup › Mercedes-Benz › C-Class › 2020
Car problem report
2020 Mercedes-Benz C-Class problems, recalls and owner complaints
What the 2020 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
- 46owner complaints
- 5crash reports
- 0fire reports
- 13%fail the UK MOT
46 complaints, against an average of 198 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 2020 Mercedes-Benz C-Class?
The components named most often in the 46 owner complaints. One complaint can name several, so the shares can add up to more than 100%.
What symptoms do 2020 Mercedes-Benz C-Class owners describe?
Found by reading the text of all 46 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 2020 Mercedes-Benz C-Class?5 owners · 10.9%
- Why does my 2020 Mercedes-Benz C-Class stall, lose power or shut off while driving?4 owners · 8.7%
- Why does my 2020 Mercedes-Benz C-Class idle rough, misfire or hesitate?4 owners · 8.7%
- Has the 2020 Mercedes-Benz C-Class had engine failures?3 owners · 6.5%
Has the 2020 Mercedes-Benz C-Class been recalled?
NHTSA lists no safety recalls for the 2020 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 2020 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 cable lug of the 48V ground connection in the engine compartment might not be fixed correctly.
Risk: On affected vehicles the cable lug of the 48V ground connection in the engine compartment might not be fixed correctly.
Fix: Check the bolting of the ground connection on the affected vehicles and repair if necessary
UK DVSAOn affected vehicles the bolting of the 48V ground connection in the engine compartment might not be sufficiently tightened.
Risk: On affected vehicles the bolting of the 48V ground connection in the engine compartment might not be sufficiently tightened.
Fix: Check the bolting of the ground connection and correct if necessary.
UK DVSAThe software of the rear signal acquisition and actuation module might not meet specifications
Risk: The software of the rear signal acquisition and actuation module might not meet specifications.
Fix: Update the software of the signal acquisition and actuation module 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 DVSAThe configuration of the mbux system might not meet specifications
Risk: On certain vehicles with an active and connected Mercedes me connect account the configuration of the MBUX system might not meet specifications.
Fix: Update the configuration of the MBUX system on affected vehicles.
UK DVSAThe software of the engine control unit might not meet specifications
Risk: On certain vehicles the software of the engine control unit might not meet specifications.
Fix: Conduct an update the software of the engine control unit on the affected vehicles.
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 configuration of the mbux system might not meet specifications.
Risk: On certain vehicles with an active and connected Mercedes me connect account the configuration of the MBUX system might not meet specifications.
Fix: A remote update of the configuration of the MBUX system will be conducted without the need for a workshop visit.
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 DVSAThe belt tensioner arm may have been manufactured with borderline tolerance
Risk: The belt tensioner arm may have been manufactured with borderline tolerance.
Fix: Replace the belt tensioner. Additionally check the v-ribbed belt on the affected vehicles and replace it if necessary.
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 DVSAThe bolting of the high voltage battery to the vehicle body in the luggage compartment might not meet specifications
Risk: The bolting of the high-voltage battery to the vehicle body in the luggage compartment might not meet specifications.
Fix: Check the bolting of the high-voltage battery to the vehicle body on the affected vehicles and rework if necessary.
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 wiring harness of the steering control unit may not have been manufactured to specification
Risk: The wiring harness of the steering control unit might not have been manufactured according to specification.
Fix: Check the wiring harness of the steering control unit on the affected vehicles and replace it if necessary.
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 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 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 DVSAThe left rear seat backrest lock may not meet specifications
Risk: The left rear seat backrest lock might not meet the specifications
Fix: Replace the left rear seat backrest lock on the affected vehicles.
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.
EU Safety GateFuel may leak and the fuel line pressure may drop, leading to misfires or even engine stalling while driving, increasing the risk of an…Fuel may leak and the fuel line pressure may drop, leading to misfires or even engine stalling while driving, increasing the risk of an accident. Moreover, fuel leaks could pose a risk to 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 airbag control unit may be faulty, resulting in that the PRE-SAFE function and/or the active bonnet are not activated as intended,…The airbag control unit may be faulty, resulting in that the PRE-SAFE function and/or the active bonnet are not activated as intended, increasing the risk of injury in case 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 GateMoisture could enter the signal acquisition and actuation module.In this case, a short circuit may occur and as a result the risk of fire increases. Moreover, this moisture may cause the exterior lighting at the rear of the vehicle to fail, the rear backseat may unintentionally fold, and the rear-view camera may not be available, 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 GateDue to a defect in the high fuel pressure manifold the engine might be damaged.This may lead to reduced engine power and to inability to start the vehicle, increasing the risk of an accident.
Measures: Type of economic operator taking notified measure(s): Importer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateThe latching of the electrical connector of the left acceleration crash sensor onto the cross beam may not be in line with specifications,…The latching of the electrical connector of the left acceleration crash sensor onto the cross beam may not be in line with specifications, so the electrical connector of the crash sensor might become detached as a result of vibration while the vehicle is driven or in an accident with multiple impacts. As restraint systems will not be triggered, this could reduce the restraint effect, increasing the 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 GateThe cupholder in the centre armrest of the second seat row may become detached from the armrest in the event of an accident.This could increased the risk of injury to occupants of the vehicle.
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 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 high-voltage battery might not be correctly screwed to the body of the vehicle in the boot area.As a result, it could become detached in the event of an accident, increasing the risk of injury to the occupants of the vehicle.
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 left tank strap may not have been screwed correctly and could become loose, causing the fuel tank to come into contact and become…The left tank strap may not have been screwed correctly and could become loose, causing the fuel tank to come into contact and become damaged by the drive shaft. This might result in a fuel leak, leading to increased risk of fire and 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 wiring harness for the steering control device may have been damaged during the production process and can allow moisture to ingress…The wiring harness for the steering control device may have been damaged during the production process and can allow moisture to ingress into the control unit.This may lead to the loss of electric steering support, increasing the risk of accident. Moreover, a short circuit of the damaged wiring harness can occur, 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 GateDue to delivery of the wrong complete winter tyre kit, clients/garages may have installed a wheel-tyre-combination which is not authorised…Due to delivery of the wrong complete winter tyre kit, clients/garages may have installed a wheel-tyre-combination which is not authorised for the vehicles. When driving, high loads together with high speeds could overstrain the tyres and result in inadmissible heating which could cause damage to the tyres.
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 left-hand side, rear seat-back lock does not comply with the specifications.This could lead to a failure of the seat-back locking system in the event of an accident, increasing the 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 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
How often does the 2020 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 2020, 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 2020 Mercedes-Benz C-Class owners report?
12 of the 46 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.
I own a 2020 Mercedes-Benz C300 equipped with a power trunk. On July 22, 2026, I took my vehicle to Annapolis Mercedes-Benz because the power trunk was repeatedly closing on its own while people were standing in the trunk opening. I specifically reported that the trunk was unexpectedly closing while I, my child, or another individual was loading or unloading the vehicle and expressed concern that someone could be injured. The dealership kept the vehicle for several hours but advised me that no malfunction could be found. I was told the trunk had been reset and that there were no problems with…
Automatic trunk closing mechanism caused the trunk hood to close on my head as I was putting groceries in the trunk. This has occurred several times in the past but this time it hit my head with more force. I have not brought it to a dealer and it has not been inspected by the manufacturer, police or any other entity. There was no warning or alarm before it closed. This could cause serious head injury to an individual on blood thinners.
Vehicle has ongoing and recurring electrical and engine-related defects that affect safe operation. The primary systems involved are the electrical system, engine ignition system, and powertrain. The vehicle is available for inspection upon request. Prior service records show issues beginning in 2020 involving repeated electronic system failures requiring multiple repairs and component replacements. Since purchasing the vehicle in April 2023, the vehicle has developed more serious failures, including: – September 2024: Check engine light with loss of power and inability to exceed safe driving…
The contact owns a 2020 Mercedes-Benz C300. The contact stated that while at a stop, the vehicle failed to accelerate as intended. There was no warning light illuminated. The dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure and referred the contact to the NHTSA Hotline to report the failure. The failure mileage was approximately 100,000.
Car stops accelerating and shifts into neutral without warning I nearly got hit from behind. I have consulted several other Mercedes vehicle owners and all had the same issue. Two of the other owners stated that this happened on the interstate and was very lucky they were not involved in a collision. Both vehicles were GLC 300. Mercedes does not seem to have an answer to the issue and all previous owners traded vehicles for fear of dying.
I purchased this vehicle on December 26, 2025 from an authorized Mercedes-Benz dealership. Shortly after the purchase, I discovered an issue related to the airbag system, which indicates a potential safety defect. At the time of purchase and during the test drive, the vehicle was already turned on, and no warning or disclosure was provided regarding any airbag malfunction or warning message. The issue became apparent only after the purchase. I later brought the vehicle in for repairs. While some repairs were performed, the airbag issue was not fixed and remains in the same condition as before…
points: ⸻ While driving, the vehicle displays the warning “Active Brake Assist Functions Limited – See Operator’s Manual.” The message appears during normal driving and does not go away. This warning indicates that the automatic emergency braking / Active Brake Assist system is limited or disabled, reducing a critical safety feature designed to help prevent or mitigate collisions. This creates a safety risk because the vehicle may not automatically brake in an emergency situation. The warning appeared suddenly while driving, with no visible obstructions, weather conditions, or damage to…
I purchased this 2020 Mercedes-Benz C300 only two months ago and have driven it less than 3,000 miles. The Carfax report shows consistent maintenance and regular service history by prior owners. While driving, the check engine light came on and the vehicle began shaking and running roughly. Diagnostics by Peachtree Imports (10/03/2025) and later by Mercedes-Benz of Atlanta South confirmed Cylinder #2 failure on the M264 2.0L engine at only 26,589 miles. The dealer’s report states: “Cylinder #2 mixture formation out of spec. Fault occurred due to worn exhaust valve seat. Cylinder head…
My wife was driving our 2020 Mercedes Benz C300 coupe near our house and the engine light came on. Then the car could not be driven over the speed of 30 miles per hour. Then it stopped and had to be towed. Fortunately, she was able to avoid being hit by other vehicles.The car only has 25219 miles. It was towed to a mechanic who performed a diagnostic test which provided a series of codes regarding the malfunction. Three codes were related to the CAMTRONIC camshaft system and its Solenoid ( Codes: P003C-53; P34AE-00; P34AD-09). Camshaft position actuators Failure codes: P34AD; P34AE. The way it…
The contact owns a 2020 Mercedes-Benz AMG C43. The contact received notification of NHTSA Campaign Number: 22V232000 (Back Over Prevention) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer was made aware of the issue. The manufacturer was made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.
CEL with multiple cylinder misfires. Oil leak on top side of engine bank 2 in valley of injectors. Multiple codes for turbo charger faults and also clogged catalytic converters. Dealer confirmed and manufacturer denied federal emissions warranty on vehicle. Due to a modification that plays no role in the power train.
******* DELETE VOQ ******* THIS COMPLAINT IS BEING MARKED FOR DELETION BECAUSE THE CONSUMER PLACED THE REQUEST.*DJR ******* DELETE VOQ *******
Mercedes-Benz guides on CarHooq
- Mercedes Regenerative Braking - How It WorksGuide · 11 min read
- Mercedes Brake Dust Problem - How to Remove Brake Dust from the Inside Wheel and Between Wheel NutsGuide · 13 min read
- Mercedes Sprinter Cabin Air Filter ReplacementGuide · 14 min read
- A Detailed Guide on Mercedes BlueTec CoolantGuide · 11 min read
2020 Mercedes-Benz C-Class: questions owners ask
Is the 2020 Mercedes-Benz C-Class reliable?
NHTSA data alone cannot rate reliability, but it shows what owners reported. Owners filed 46 complaints with NHTSA about the 2020 Mercedes-Benz C-Class; the most common categories were engine (9, 19.6%), power train (7, 15.2%), structure (5, 10.9%). There are no safety recalls listed for this model year. 5 complaints mention a crash, 5 injuries were reported.
What are the most common problems with the 2020 Mercedes-Benz C-Class?
Across 46 owner complaints filed with NHTSA, the categories mentioned most often are engine (19.6% of complaints), power train (15.2% of complaints), structure (10.9% of complaints), back over prevention (8.7% of complaints), electrical system (8.7% of complaints). One complaint can name several components.
Does the 2020 Mercedes-Benz C-Class have any recalls?
As of October 2026, NHTSA lists no safety recalls for the 2020 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 2020 Mercedes-Benz C-Class?
5 of the 46 owner complaints NHTSA has on file for the 2020 Mercedes-Benz C-Class (10.9%) describe the check engine light coming on. One owner wrote: "Vehicle has ongoing and recurring electrical and engine-related defects that affect safe operation. The primary systems involved are the electrical system, engine ignition system, and powertrain. The vehicle is available for inspection upon request." (NHTSA complaint 11733212, April 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 my 2020 Mercedes-Benz C-Class stall, lose power or shut off while driving?
4 of the 46 owner complaints NHTSA has on file for the 2020 Mercedes-Benz C-Class (8.7%) describe the engine stalling, losing power or shutting off while driving. One owner wrote: "Vehicle has ongoing and recurring electrical and engine-related defects that affect safe operation. The primary systems involved are the electrical system, engine ignition system, and powertrain. The vehicle is available for inspection upon request." (NHTSA complaint 11733212, April 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 my 2020 Mercedes-Benz C-Class idle rough, misfire or hesitate?
4 of the 46 owner complaints NHTSA has on file for the 2020 Mercedes-Benz C-Class (8.7%) describe rough idling, misfires or hesitation when accelerating. One owner wrote: "CEL with multiple cylinder misfires. Oil leak on top side of engine bank 2 in valley of injectors. Multiple codes for turbo charger faults and also clogged catalytic converters. Dealer confirmed and manufacturer denied federal emissions warranty on vehicle." (NHTSA complaint 11497171, 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.
Has the 2020 Mercedes-Benz C-Class had engine failures?
3 of the 46 owner complaints NHTSA has on file for the 2020 Mercedes-Benz C-Class (6.5%) describe complete engine failure or a replaced engine. One owner wrote: "Cylinder head is defective. Service advisor told me it was a known issue in which exhaust valves within cylinder head are prone to premature wear. If left unaddressed it leads to inevitable engine failure. I was quoted $12,000." (NHTSA complaint 11580278, March 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 2020 only; combines NHTSA's entries for C-CLASS and C-CLASS CABRIOLET.