What breaks most · 2001 to 2007 model years
Mercedes-Benz C320 problems by year
Owners have filed 169 safety complaints with NHTSA about the Mercedes-Benz C320 across model years 2001 to 2007. Three years stand out: 2002 for electrical system complaints, 2001 for electrical system complaints and 2003 for electrical system complaints. The quietest years are 2005 and 2004.
- Years to check closely: 2002, 2001, 2003
- Fewest complaints: 2005, 2004
- Complaints on file
- 1692001 to 2007, all trims
- Worst year
- 200263 complaints
- Crashes reported
- 96 fires · 7 injuries · 1 deaths
- Typical failure mileage
- 69kMedian where owners gave mileage
- Recall campaigns
- 16Across 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 |
|---|---|---|---|---|
| 60 | 3 | 3 | Electrical system (26) | |
| 63 | 3 | 3 | Electrical system (33) | |
| 17 | 2 | 3 | Electrical system (5) | |
| 14 | 1 | 3 | Fuel system (4) | |
| 12 | 0 | 4 | Engine and cooling (4) | |
| 1 | 0 | 0 | Air bags (1) | |
| 2 | 0 | 0 | Fuel system (1) |
What fails on the 2002 Mercedes-Benz C320
| Component | Share of complaints | Filings | Crashes | Parts for this job |
|---|---|---|---|---|
| Electrical systemAlternators, starters and ignition | 52% |
33 | 1 | Shop electrical system parts for the 2002 Mercedes-Benz C320 |
| Seats | 35% |
22 | 0 | — |
| Stability controlABS and wheel speed sensors | 8% |
5 | 0 | Shop stability control parts for the 2002 Mercedes-Benz C320 |
| Powertrain and transmissionTransmission parts | 8% |
5 | 0 | Shop all powertrain and transmission parts, not filtered to this vehicle |
| Air bags | 6% |
4 | 3 | Check recalls for air bags on NHTSA.gov |
| Exterior lightingHeadlights, tail lights and bulbs | 6% |
4 | 0 | Shop exterior lighting parts for the 2002 Mercedes-Benz C320 |
| Unknown or other | 3% |
2 | 0 | — |
| Body and structureDoors, latches and body hardware | 3% |
2 | 0 | Shop body and structure parts for the 2002 Mercedes-Benz C320 |
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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There have been two warning lights for rear lights and after driving for 4 hours, a warning came on for electrical stability and my car quit working completely. There was a burning smell and i had to restart it. I am very concerned about this.
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I just bought the car and two days later the smart key won't turn, can't unlock the steering wheel and the shiffter the good think the car was parked on my drive way call tow truck take to the shop and they say i need a new key and ignition control module but only dealer can do that, $1,400.00 dollars job
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The fuel gauge failed to function. It didn't register the correct gas level in the tank. The digital console light malfunctioned. It would either not illuminate when the vehicle was started or when illuminated it will suddenly go out. The vehicle hesitated upon acceleration when driven for long distances. *nlm
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 30, 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 C320 years have the most problems?
By NHTSA complaint volume, 2002, 2001, 2003 carry the most filings on the Mercedes-Benz C320. The 2002 alone has 63 complaints, led by electrical system.
What is the most common Mercedes-Benz C320 problem?
On the 2002 model year, the most-reported component is electrical system with 33 complaints. The table above lists the top components for every year.
At what mileage do Mercedes-Benz C320 problems start?
The median mileage at failure across all Mercedes-Benz C320 complaints that include mileage is about 69,000 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.