CarRecallWatchThe 2020 Mercedes-Benz C 300 has 9 safety recalls on file with NHTSA.
Owners have filed 33 complaints with NHTSA, including 5 crashes, 5 injuries.
The most-reported problem area is Engine (8 reports).
2020 Mercedes-Benz C 300 recalls
Front Roof Panel May Detach, Creating Crash Risk
The front roof panel, located between the windshield and the panoramic sunroof, may not have been bonded correctly to the vehicle during a prior repair.
Emergency call system may fail to connect in a crash
A software error in the communication module's SIM card can cause a mobile network connection failure.
Rearview camera may show no image, raising crash risk
The rearview camera may fail to display the rear view because of a software error.
Misaligned LED headlights may reduce nighttime visibility
Some vehicles may have had their LED headlights incorrectly adjusted during a repair.
Front roof panel may detach while driving, creating a crash hazard
The front roof panel, located between the windshield and the panoramic sunroof, may not have been bonded correctly to the vehicle during a previous repair.
Crash Alert May Send Responders to Wrong Location
Certain 2016-2017 Mercedes-Benz vehicles have a software problem in the communication module that runs the automatic crash notification (eCall) system.
Front seat belts may not fully retract, raising injury risk
Certain Mercedes-Benz C300, AMG C43, and AMG C63 vehicles may have front seat belts that do not fully retract to their stowed position.
Loose Turbo Oil Lines Can Leak and Cause Fire
Some turbocharged four-cylinder engines may have turbocharger oil feed and return line screws that were not properly tightened.
Emergency Call Module May Send Wrong Vehicle Location
A circuit inside the Emergency Call System (eCall) communication module may be damaged, which could cause the system to relay an inaccurate vehicle location in an emergency.
Most common 2020 Mercedes-Benz C 300 problems
Problem areas named in the 33 complaints owners filed with NHTSA.
| Problem area | Reports |
|---|---|
| Engine | 8 |
| Unknown Or Other | 5 |
| Forward Collision Avoidance | 4 |
| Structure | 4 |
| Fuel/Propulsion System | 3 |
| Electrical System | 3 |
| Visibility | 3 |
| Power Train | 3 |
| Vehicle Speed Control | 2 |
| Latches/Locks/Linkages | 2 |
What owners report
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 the vehicle. I also provided video evidence of the trunk malfunction by text message to my service
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: â September 2024: Check engine light with loss of power and inability to exceed safe driving speeds â October 2024: Engine misfiring due to ignition coil failure requiring replacement of
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.
I am reporting a catastrophic repeat engine failure on my 2020 Mercedes-Benz C300. On October 9, 2025, with 26,589 miles, the vehicle suffered a Cylinder 2 failure (exhaust valves), causing a dangerous loss of power in traffic. I paid $4,100.43 for a $10,000 plus cylinder head replacement at an authorized dealer (Mercedes-Benz of Atlanta South) on November 13, 2025. Following the repair, the vehicle continued to exhibit multiple 'Check Engine Oil Level' warnings. On February 4, 2026âless than 90 days after the major repairâthe engine suffered a total catastrophic failure. The dealer now states the entire engine requires replacement. This repeat failure of a critical engine component at
2020 Mercedes-Benz C 300 questions
Does the 2020 Mercedes-Benz C 300 have any recalls?
Yes. NHTSA lists 9 safety recalls for the 2020 Mercedes-Benz C 300: Front Roof Panel May Detach, Creating Crash Risk; Emergency call system may fail to connect in a crash; Rearview camera may show no image, raising crash risk; Misaligned LED headlights may reduce nighttime visibility; Front roof panel may detach while driving, creating a crash hazard. Recall repairs are normally free at an authorized dealer.
What are the most common problems with the 2020 Mercedes-Benz C 300?
Based on 33 owner complaints filed with NHTSA, the most-reported problem areas are Engine (8), Unknown Or Other (5), Forward Collision Avoidance (4).
How do I check if a recall on my 2020 Mercedes-Benz C 300 has been fixed?
Enter your 17-character VIN in our VIN recall check. It shows open recalls that have not been repaired on your specific vehicle. Recall repairs are normally free at an authorized dealer.