2001 Mercedes-Benz C320 problems & reliability
63 owner complaints filed with NHTSA for the 2001 Mercedes-Benz C320, alongside 3 safety recall campaigns. Last verified Aug 7, 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.
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Electrical System → | 26 | 41% |
| Seats → | 19 | 30% |
| Engine and Engine Cooling → | 11 | 17% |
| Exterior Lighting | 7 | 11% |
| Visibility | 6 | 10% |
| Equipment | 5 | 8% |
| Service Brakes, Hydraulic | 5 | 8% |
| Vehicle Speed Control | 5 | 8% |
| Steering | 4 | 6% |
| Air Bags | 3 | 5% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
All 22 reported components →Common symptoms owners describe
Keyword analysis of complaint narratives; one complaint can describe several symptoms.
Mileage when problems occurred
Among the 47 complaints that included a usable odometer reading, the median reported incident mileage was 70,000 miles (middle 50% between 51,750 and 100,606 miles).
Complaints by incident year
What owners report
“The contact owns a 2001 Mercedes-Benz C320. The contact stated that there was rust on the bottom of the driver’s side and passenger’s side door panels. The contact stated that the water ran down, enter the door, and then failed to properly drain. The contact stated there were no drain plugs or holes for the water to…”
Structure · filed Oct 30, 2023
“The contact owns a 2001 Mercedes-Benz C320. The contact received notification of NHTSA Campaign Number: 19V918000 (Visibility) however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made…”
Visibility · filed Jun 10, 2022
“Tl* the contact owns a 2001 mercedes-benz c320. The contact received notification of nhtsa campaign number: 19v918000 (visibility). The contact called an unknown mercedes-benz dealer, located in mesa, az, and it was confirmed that the parts were not available. The contact stated that the sunroof failed close, causing…”
Visibility · filed May 29, 2020
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Technical service bulletins
38 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 2001 Mercedes-Benz C320. The 10 most recent:
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
Complaint During a phone call, the called party has difficulty understanding/cannot understand the driver, or interference/background noises are audible to the called party during a call. It becomes increasingly…
LI82.70-P-077433 · Service Bulletin/Repair Instructions · issued Mar 5, 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). Cause If the complaint…
LI33.30-P-056665 · Service Bulletin/Repair Instructions · issued Jan 16, 2025
Complaint 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…
LI35.30-P-058566 · Service Bulletin/Repair Instructions · issued Jan 15, 2025
Complaint Washer fluid system leaks Cause Various possible causes: 1. Washer fluid reservoir itself. 2. Seal on washer fluid pump/washer fluid reservoir. 3. Washer fluid pump. 3.1. Distributor housing leaks. 3.2. Pump…
LI82.35-P-078467 · Service Bulletin/Repair Instructions · issued Oct 23, 2024
Complaint During a phone call, the called party has difficulty understanding/cannot understand the driver, or interference/background noises are audible to the called party during a call. It becomes increasingly…
LI82.70-P-077433 · Service Bulletin/Repair Instructions · issued Sep 28, 2024
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 2001 Mercedes-Benz C320 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 2001 Mercedes-Benz C320?
- · 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 70,000 miles. This does not predict when a particular vehicle will develop a problem.