Mercedes-Benz S350 Problems by Model Year
NHTSA recorded 7 consumer complaints across the 1 model years of the Mercedes-Benz S350 (2012–2012) that have at least 5 complaints. 2012 has the most, with 7. Across all years, the part named most often is engine (3 mentions). Pick a model year below to see its parts, mileage, recalls and service bulletins.
All S350 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 |
|---|---|---|---|---|---|---|
| 2012 | 7 | 54,500 | 0 | 70 | — | Not enough data |
Parts named most often, all years
Counts add up complaint mentions across the listed years. A complaint can name several parts.
- Engine3 30%
- Vehicle speed control2 20%
- Transmission and drivetrain2 20%
- Fuel system2 20%
- Other or unknown1 10%
Example complaints
One per model year, chosen for length and detail. Personal details are removed. They are consumer reports, not findings.
2012: “I did some research on mercedes 3.0l diesel motors and there seems to be an issue with the seal failing about 50,000 miles causing the motor to leak oil and the seal as well as the oil cooler need to be replaced. It is such a common problem on the 3.0l diesel engines that when you call any repair shop the first thing they ask is if the car is a diesel. Also the seal replacement is all over the mercedes blogs saying the same issue on the 3.0l diesels. …”
NHTSA complaint #10928395, filed 2016-11, 54,500 milesOther Mercedes-Benz models
3,963 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
657 complaints
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate. Methodology