What breaks most · 2010 to 2017 model years
Mercedes-Benz C350 problems by year
Owners have filed 120 safety complaints with NHTSA about the Mercedes-Benz C350 across model years 2010 to 2017. Three years stand out: 2012 for air bags complaints, 2011 for air bags complaints and 2013 for air bags complaints. The quietest years are 2014 and 2010.
- Years to check closely: 2012, 2011, 2013
- Fewest complaints: 2014, 2010
- Complaints on file
- 1202010 to 2017, all trims
- Worst year
- 201235 complaints
- Crashes reported
- 42 fires · 4 injuries · 0 deaths
- Typical failure mileage
- 64kMedian where owners gave mileage
- Recall campaigns
- 27Across the years shown
Complaints by model year
Raw filings with NHTSA, not adjusted for how many were sold.
| Model year | Complaints | Crashes | Recalls | Most-reported component |
|---|---|---|---|---|
| 18 | 3 | 4 | Air bags (10) | |
| 26 | 0 | 4 | Air bags (16) | |
| 35 | 0 | 5 | Air bags (27) | |
| 21 | 0 | 6 | Air bags (15) | |
| 13 | 1 | 4 | Air bags (8) | |
| 6 | 0 | 4 | Air bags (3) | |
| 1 | 0 | 0 | Electrical system (1) |
What fails on the 2012 Mercedes-Benz C350
| Component | Share of complaints | Filings | Crashes | Parts for this job |
|---|---|---|---|---|
| Air bags | 77% |
27 | 0 | Check recalls for air bags on NHTSA.gov |
| EngineEngine gaskets and seals | 6% |
2 | 0 | Shop engine parts for the 2012 Mercedes-Benz C350 |
| Fuel systemFuel pumps and injectors | 6% |
2 | 0 | Shop fuel system parts for the 2012 Mercedes-Benz C350 |
| SuspensionStruts, springs and control arms | 6% |
2 | 0 | Shop suspension parts for the 2012 Mercedes-Benz C350 |
| VisibilityMirrors and glass | 3% |
1 | 0 | Shop all visibility parts, not filtered to this vehicle |
| Unknown or other | 3% |
1 | 0 | — |
| Body and structureDoors, latches and body hardware | 3% |
1 | 0 | Shop body and structure parts for the 2012 Mercedes-Benz C350 |
| BrakesBrake pads, rotors and calipers | 3% |
1 | 0 | Shop brakes parts for the 2012 Mercedes-Benz C350 |
One complaint can name more than one component, so shares add to more than 100%. "Unknown or other" is NHTSA's uncategorized bucket and is shown but never ranked.
In owners' words
Complaint narratives as filed with NHTSA, trimmed for length.
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Known fault of rattling noise after engine start for several seconds 07-16-2013 engine 276, engine 278, engine 157 topic number version design group date validity reason for change
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When fuel tank is about 75%-100% full, the car will smell heavily of gasoline inside and around the rear of the vehicle. Upon inspection, fuel pump cover/cap seems to be cracked and leaking fuel. Engine code p0456.
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The frame is literally rotting from the inside out. Apparently this is a very common problem with Toyota 4 runners. This should have been recalled and fixed by Toyota like they did with the Tacoma and sequoias.
How to read this page
Every figure comes from the National Highway Traffic Safety Administration's public complaint database, which holds every safety-related defect complaint filed by owners since 1995. We refresh it monthly and count each complaint once per component it names. Data through September 6, 2026.
NHTSA only accepts safety-related complaints. Rattles, paint, infotainment bugs and other annoyances are under-reported here, so this page is a map of what fails in ways owners consider dangerous, not a full reliability score.
Counts are raw. Use the year-over-year shape and the component mix, not the absolute numbers. Where a component maps to parts we stock, the row links to that category filtered to the year you are viewing. Air bag and seat belt complaints link to the recall checker instead, because those repairs are almost always covered.
Common questions
Which Mercedes-Benz C350 years have the most problems?
By NHTSA complaint volume, 2012, 2011, 2013 carry the most filings on the Mercedes-Benz C350. The 2012 alone has 35 complaints, led by air bags.
What is the most common Mercedes-Benz C350 problem?
On the 2012 model year, the most-reported component is air bags with 27 complaints. The table above lists the top components for every year.
At what mileage do Mercedes-Benz C350 problems start?
The median mileage at failure across all Mercedes-Benz C350 complaints that include mileage is about 64,000 miles. Older model years skew higher; the per-year figure is in the "at a glance" card.
Are these complaints verified?
No. NHTSA publishes complaints as submitted and does not investigate individual filings. Patterns across hundreds of complaints are meaningful; a single one is not.