2008 Mercedes-Benz R350 Engine Problems
- Complaints
- 5about this part
- Share
- 14%of 35 total for the year
- Median mileage
- 107,988miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 5 complaints about the engine of the 2008 Mercedes-Benz R350, 14% of the 35 complaints for this model year. Where a mileage was given, the median is 107,988 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“This vehicle has a balance shaft and intake manifold issue as well as a air suspension problem. Both problems are a manufacture defect that is common in other mb R350 vehicles. Mb accepts that this vehicle model have a conglomerate of problems and is not taking responsibility to create a recall. This vehicle is always maintain and service by an authorized mb dealer and they insure that in any of the previous services the diagnosis was never identified or mention. The low suspension is a safety issue that may cause the wheels to rub against the fenders and cause driver to loose control. …”
NHTSA complaint #10475739, filed 2012-09, 107,000 miles“The contact owns a 2008 Mercedes-Benz R350. While driving approximately 45 MPH, the engine made a loud noise and the vehicle shut off. The vehicle was towed to an independent mechanic who diagnosed that the engine needed to be replaced due to a faulty balance shaft. The engine was replaced, but the failure recurred within a couple of weeks. The vehicle was towed to another Mercedes-Benz mechanic where the engine was replaced again, but the failure recurred after a couple of days. The vehicle was taken back to an independent mechanic and the engine was replaced a third time. …”
NHTSA complaint #11166265, filed 2019-01, 158,000 milesRelated service bulletins
- 11017039Apr 1, 2025Complaint Vehicle with atypical reduced heat output. Cause Silicate granulate may have escaped from a damaged bag in the expansion reservoir (not visible), reducing the coolant…
- 10158329Oct 9, 2017Oil in engine wiring harness
Engine: other model years
Other parts of the 2008 Mercedes-Benz R350
12 complaintsSteering
10 complaintsBrakes
6 complaintsElectrical system
5 complaintsAir bags
2 complaintsOther or unknown
2 complaintsElectronic stability control
1 complaintsExterior lighting
1 complaintsFuel system
1 complaintsLatches, locks and linkages
1 complaintsSeat belts
1 complaintsTransmission and drivetrain
1 complaints
← All problems reported for the 2008 Mercedes-Benz R350
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology