2021 Mercedes-benz C-Class C300-4M
W1KWF8EB0MR625412
Vehicle history report for the 2021 Mercedes-benz C-Class C300-4M (VIN W1KWF8EB0MR625412). Selenite gray metallic, sedan/saloon, 2.0L 4-cyl, gasoline. Registered in Md. No open recalls. Unlock full title, salvage, lien & accident history.
At a glance
Vehicle identity & specifications
Full vehicle history report
What a full report checks for VIN W1KWF8EB0MR625412
A full report searches national title databases (NMVTIS) and licensed history providers for this VIN and shows whatever records are on file — not every vehicle has every record type. The decode, safety recalls and owner complaints above are always free.
Safety recalls None found
No open NHTSA recall campaigns were found for this 2021 MERCEDES-BENZ C-Class.
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Common problems & what to inspect
Based on 14 owner complaints filed with NHTSA for the 2021 Mercedes-benz C-Class, here are the most-reported problem areas — and exactly what to check before you buy.
🔍 Listen for knocks or ticking, check for leaks and blue/white exhaust smoke, and make sure it doesn't overheat. No check-engine light should be on.
🔍 Drive through every gear: watch for slipping, hard or delayed shifts, and shudder. Check for transmission/driveline leaks and noises.
🔍 Confirm the airbag light turns on then off at startup — if it stays lit there's a fault (costly, and a safety risk). Check for signs of prior deployment.
🔍 Check for fuel or battery warnings, hard starts and stalling. On a hybrid/EV, confirm charging and range behave normally.
🔍 Sniff for fuel odor, check for leaks, hard starts or stalling, and confirm the fuel gauge reads correctly.
🔍 Have a trusted mechanic inspect this system as part of a pre-purchase inspection.
Pre-purchase checklist
- Match the VIN on the dash, door jamb and title — they must be identical.
- Cold-start the engine; listen for knocks and check for blue or white exhaust smoke.
- Test-drive through all gears at low and highway speed — no slipping, shudder or pulling.
- Confirm every warning light clears at startup (none should stay on).
- Check fluids — oil, coolant, transmission — for level, color and leaks.
- Look underneath for rust, fresh undercoating or signs of collision repair.
- Always get an independent pre-purchase inspection from a trusted mechanic.
Owner complaints 14
Complaints filed with NHTSA by owners of the 2021 Mercedes-benz C-Class.
FUEL SYSTEM, GASOLINE
The contact owns a 2021 Mercedes Benz C. The contact stated that while driving on the highway, the vehicle began to lose power, riding rough. The check engine light illuminated. The vehicle was towed to the dealer where it was diagnosed with a fuel injection failure. The vehicle read diagnostic code P1CEF85. The manufacturer was made aware of the issue.…
NHTSA ODI #11738727VISIBILITY
I am reporting a safety defect involving the panoramic sunroof on my 2021Mercedes-Benz Coop vehicle. The panoramic sunroof has malfunctioned due to an apparent design or manufacturing defect. The sunroof fails to open / close and makes grinding or popping noises which malfunctioned unexpectedly. This issue occurred without misuse and during normal operation…
NHTSA ODI #11712287ENGINE
The contact owns a 2021 Mercedes-Benz C300. The contact stated that while driving at an undisclosed speed, the vehicle stalled and failed to exceed 30 MPH, with the check engine warning light illuminated. The vehicle did not require a restart. The contact also stated that while stopped at a traffic light, the vehicle was shaking abnormally. The vehicle was t…
NHTSA ODI #11706514SUSPENSION,POWER TRAIN,AIR BAGS
Driving and something came from underneath the vehicle and cause me to swerve in all the airbags deployed
NHTSA ODI #11704073FUEL/PROPULSION SYSTEM
My car had a coolant leak last year a hose broke and I have a 2021. My son’s mercedes sis the same thing on 11/23/2025. I have researched ma y others with this same issue. There should be a recall on that hose or whatever the problem Is.
NHTSA ODI #11701496ENGINE
2021 Mercedes-Benz C300 with M254 2.0L turbo engine experienced sudden cylinder head failure at 44,000 miles due to manufacturing porosity in the cylinder head and camshaft bore scoring. Dealer confirmed defect. This is a known, recurring issue on 2021–2023 M254 engines with multiple documented failures under 50k miles. Sudden loss of compression and misfire…
NHTSA ODI #11701560FUEL/PROPULSION SYSTEM
While driving car on Sunday 10/5, it suddenly failed to respond to gas pedal pressure. The car stopped accelerating and rather slowed to 15 MPH, almost causing a car from behind to hit me in the rear side.
NHTSA ODI #11691568POWER TRAIN,ENGINE
My C300 only had about 42,000 miles and was less than 5 years old. Just after the factory warranty expired, the engine was running rough and hot, and "check engine" light illuminated. My local garage quickly diagnosed the problem as a failed cylinder head, stated that it is common with Mercedes 4-cylinder engines from about 2017, and said Mercedes may cover …
NHTSA ODI #11678865+ 6 more complaints on record.
