Mercedes-Benz C320 Problems by Model Year
NHTSA recorded 183 consumer complaints across the 5 model years of the Mercedes-Benz C320 (2001–2005) that have at least 5 complaints. 2002 has the most, with 68. Across all years, the part named most often is electrical system (72 mentions). Pick a model year below to see its parts, mileage, recalls and service bulletins.
All C320 model years
Years with fewer than 5 complaints are not listed. The score compares years of the same model, allowing for the era and for how long each year has collected complaints: 50 is a typical year, lower means fewer complaints. It is not adjusted for sales volume.
| Year | Complaints | Median mi | Recalls | TSBs | Score (50 = typical) | Trend |
|---|---|---|---|---|---|---|
| 2005 | 15 | 96,234 | 4 | 62 | — | Falling |
| 2004 | 15 | 64,500 | 3 | 50 | — | Falling |
| 2003 | 22 | 54,352 | 3 | 49 | — | Rising |
| 2002 | 68 | 70,000 | 3 | 48 | Not compared (before 2008) | Rising |
| 2001 | 63 | 70,000 | 3 | 38 | Not compared (before 2008) | Falling |
Parts named most often, all years
Counts add up complaint mentions across the listed years. A complaint can name several parts.
- Electrical system72 34%
- Seats46 22%
- Engine cooling21 9.9%
- Exterior lighting16 7.5%
- Fuel system15 7.1%
- Air bags15 7.1%
- Visibility (wipers, defrost, mirrors)14 6.6%
- Brakes13 6.1%
Example complaints
One per model year, chosen for length and detail. Personal details are removed. They are consumer reports, not findings.
2005: “I went to change my low beam headlight bulb and found the wiring insulation all flaking off to about six inches from the bulb connector. I searched on line and found others complaining of this same thing. I suspect since these wires are hidden inside the headlight assembly, the problem is much more common.”
NHTSA complaint #11181940, filed 2019-02, 205,000 miles2001: “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”
NHTSA complaint #10861059, filed 2016-04, 109,042 miles2004: “I have a 2004 mercedes C320 that incorrectly thought that it needed to cut power to the vehicle when I was turning to the left. It did this several times, I would guess about 6 or 7, from the time I left my house until I turned around and parked it in the garage less than 1/2 mile driving distance. These were not all complete left turns, most were curves to the left. …”
NHTSA complaint #10356216, filed 2010-09, 55,000 milesOther Mercedes-Benz models
3,965 complaintsMercedes-Benz E350
2,215 complaintsMercedes-Benz E320
1,164 complaintsMercedes-Benz ML350
952 complaintsMercedes-Benz GLK350
901 complaintsMercedes-Benz ML320
740 complaintsMercedes-Benz C250
725 complaintsMercedes-Benz GLC 300
658 complaints
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate. Methodology