2005 Mercedes-Benz C240 problems & reliability
30 owner complaints filed with NHTSA for the 2005 Mercedes-Benz C240, alongside 3 safety recall campaigns. Last verified Aug 8, 2026. Complaints are unverified reports submitted by owners to the federal Office of Defects Investigation.
Each complaint is counted once (by NHTSA case number), even when it names several vehicles.
2 complaints report injuries (2 injured).
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Air Bags | 8 | 27% |
| Fuel/propulsion System | 3 | 10% |
| Seat Belts | 3 | 10% |
| Seats | 3 | 10% |
| Steering | 3 | 10% |
| Suspension | 3 | 10% |
| Electrical System | 2 | 7% |
| Engine | 2 | 7% |
| Engine and Engine Cooling | 2 | 7% |
| Power Train | 2 | 7% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
All 17 reported components →Mileage when problems occurred
Among the 21 complaints that included a usable odometer reading, the median reported incident mileage was 73,560 miles (middle 50% between 37,300 and 100,000 miles).
Complaints by incident year
What owners report
“Just recently while driving with my front windows opened on my Mercedes 2005 C 320, I heard a Big thump on the passenger side of vehicle. At first, I thought it was a bird that flew in to Car. So, stopped and parked by the side of road to discover that the Passenger Head Rest on passenger side just broke off for NO…”
Other/i AM Not Sure · filed Sep 27, 2025
“The contact owns a 2005 Mercedes-Benz C240. The contact stated that rainwater had entered the vehicle through the sunroof and damaged the computer. The contact received notification of NHTSA Campaign Number: 19V918000 (Visibility) after the failure occurred. The vehicle was taken to the local dealer who declined the…”
Electrical System · filed Sep 23, 2021
“"takata recall" the car has a gas smell especially when we turn the heaters on/ it is very strong fumes & the windows have to be rolled down when driving/ has a gas leak”
Fuel/propulsion System · filed Nov 2, 2018
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Technical service bulletins
57 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 2005 Mercedes-Benz C240. The 10 most recent:
Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The noise is heard once in each instance when changing direction of travel. Note: Sound file in attachment Cause…
LI35.30-P-058566 · Service Bulletin/Repair Instructions · issued Jul 14, 2026
Complaint There are several types of complaint about noises or poor windshield wiper wiping performance: A: Wiper blades squeaking, chattering, shuddering B: The windshield is not wiped completely (streaking) C: During…
LI82.30-P-059239 · Service Bulletin/Repair Instructions · issued May 19, 2026
Complaint Headlamp, front fog lamp leaky or fogged. Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to any technical impairment of the…
LI82.10-P-078301 · Service Bulletin/Repair Instructions · issued Apr 16, 2026
Complaint Headlamp, front fog lamp leaky or fogged Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to any technical impairment of the headlamp…
LI82.10-P-078301 · Service Bulletin/Repair Instructions · issued Mar 9, 2026
Complaint Headlamp, front fog lamp leaky or fogged Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to any technical impairment of the headlamp…
LI82.10-P-078301 · Service Bulletin/Repair Instructions · issued Feb 24, 2026
Complaint Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The clunk is heard once when changing from forward to reverse (and vice versa). Note: Sound file in…
LI33.30-P-056665 · Service Bulletin/Repair Instructions · issued Nov 15, 2025
Complaint Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The clunk is heard once when changing from forward to reverse (and vice versa). Note: Sound file in…
LI33.30-P-056665 · Service Bulletin/Repair Instructions · issued May 21, 2025
Complaint Headlamps leaking or fogged Cause The fogging of the headlamp is a natural phenomenon which can occur under certain climatic conditions. In contrast to a leaky headlamp, physical fogging does not result in a…
LI82.10-P-078896 · Service Bulletin/Repair Instructions · issued Apr 28, 2025
Complaint Headlamp, front fog lamp leaky or fogged Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to any technical impairment of the headlamp…
LI82.10-P-078301 · Service Bulletin/Repair Instructions · issued Apr 28, 2025
Complaint Vehicle with atypical reduced heat output. Cause Silicate granulate may have escaped from a damaged bag in the expansion reservoir (not visible), reducing the coolant flow in the heater heat exchanger (see…
LI83.20-P-051802 · Service Bulletin/Repair Instructions · issued Apr 1, 2025
TSBs are repair guidance manufacturers send to dealers — they are not recalls and repairs are not automatically free. Full documents are available on NHTSA’s site.
Safety recalls
The 2005 Mercedes-Benz C240 has 3 NHTSA recall campaigns — recall repairs are free at franchised dealers regardless of the vehicle’s age.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →Buying a used 2005 Mercedes-Benz C240?
- · Decode the seller’s VIN with our free VIN decoder to confirm the exact year, engine and trim.
- · Check for unrepaired recalls by VIN on NHTSA’s official lookup — recall repairs are free.
- · Among complaints with usable mileage, the median reported incident mileage was 73,560 miles. This does not predict when a particular vehicle will develop a problem.