2009 Mercedes-Benz C350 problems & reliability
65 owner complaints filed with NHTSA for the 2009 Mercedes-Benz C350, alongside 7 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.
1 complaint report injuries (1 injured).
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Air Bags → | 25 | 38% |
| Steering → | 20 | 31% |
| Electrical System → | 16 | 25% |
| Exterior Lighting → | 13 | 20% |
| Engine | 5 | 8% |
| Seats | 3 | 5% |
| Service Brakes | 3 | 5% |
| Fuel/propulsion System | 2 | 3% |
| Power Train | 2 | 3% |
| Unknown OR Other | 2 | 3% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
Common symptoms owners describe
Keyword analysis of complaint narratives; one complaint can describe several symptoms.
Mileage when problems occurred
Half of the failures with a reported odometer reading occurred by 60,000 miles (middle 50% between 37,110 and 80,000 miles), based on 33 complaints that included mileage.
Complaints by incident year
What owners report
“Vehicle has lost its ability to be driven. Car alarm has gone of a multitude of times at different hours of day and night. Finally we were told that the steering column needs to be replaced. According to tow truck driver, Auto lock person, this is common from the 300 series of Mercedes Benz. Obviously very costly. My…”
Steering · filed May 12, 2025
“Rear brake lines corroded leading to loss of brake fluid while on the road. My at the time 4 year old son and I were in the car (I was the driver). This was in December of 2022 so almost two years ago. Earlier that year, MB dealership warned me about rear sub frame being corroded, too, but the cost of repairs ($7,000)…”
Service Brakes · filed Sep 5, 2024
“Total shutdown of complete system…brakes, steering and engine at around 25-to 30 MPH. No warning. Happened two times…once before M-B service and once after service for problem. It checked out OK from dealership months before only to have it happen again. Was lucky to avoid a crash both times. Sold to dealership. Wrote…”
Steering · filed Jul 10, 2023
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Federal defect investigations
- Desiccated Air Bag Inflator Rupture
Engineering Analysis EA21002 · opened Sep 17, 2021 · open
- Loss of rear lighting assembly
Engineering Analysis EA13008 · opened Dec 20, 2013 · closed May 12, 2014 · led to recall 14V177000
Technical service bulletins
88 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 2009 Mercedes-Benz C350. 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 Creaking noise, in irregular sequence when driving slowly in combination with slight steering movements and/or Creaking/crackling noises from the area of the wheel bearing on the front axle when cornering/…
LI33.20-P-078406 · Service Bulletin/Repair Instructions · issued Jul 7, 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 Potential corrosion on the rear axle carrier Cause Due to market-specific conditions such as moisture, ingress of dirt and/or environmental influences, corrosion can occur on the rear axle carrier Remedy In…
LI35.10-P-078931 · Service Bulletin/Repair Instructions · issued May 13, 2026
Complaint Creaking noise, in irregular sequence when driving slowly in combination with slight steering movements and/or Creaking/crackling noises from the area of the wheel bearing on the front axle when cornering/…
LI33.20-P-078406 · Service Bulletin/Repair Instructions · issued May 12, 2026
Complaint Creaking noise, in irregular sequence when driving slowly in combination with slight steering movements and/or Creaking/crackling noises from the area of the wheel bearing on the front axle when cornering/…
LI33.20-P-078406 · Service Bulletin/Repair Instructions · issued Apr 17, 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
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 2009 Mercedes-Benz C350 has 7 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 2009 Mercedes-Benz C350?
- · 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.
- · Owners most often reported problems around 60,000 miles — budget accordingly if the car is approaching that mileage.