2012 Mercedes-Benz R350 Engine Problems
- Complaints
- 1about this part
- Share
- 13%of 8 total for the year
- Median mileage
- 34,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the engine of the 2012 Mercedes-Benz R350, 13% of the 8 complaints for this model year. Where a mileage was given, the median is 34,000 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.
“The contact owns a 2012 mercedes benz e350. The contact stated that the engine stalled without warning. The vehicle was taken to the dealer, who performed a diagnostic that detected sludge in the engine. The engine was replaced however, the failure was not corrected and the vehicle continued to sporadically stall. The vehicle was taken back to the dealer for further inspection. The manufacturer was made aware of the failure. The approximate failure and current mileage was 34,000.”
NHTSA complaint #10579554, filed 2014-04, 34,000 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…
- 11031648Oct 5, 2021Mercedes-Benz USA, LLC will provide an Extended Modification Warranty for each vehicle that has received the Approved Emission Modification. The Extended Modification Warranty…
- 10160738Apr 11, 2019Update engine electronics (ME-SFI) control unit software
- 10158329Oct 9, 2017Oil in engine wiring harness
- 10056233Mar 13, 2014Xentry (mercedes): in the instrument cluster, an esp warning due to implausible accelerator pedal signal received from engine control unit. Model 2012 172, 212, 218, 207, 204.
Engine: other model years
Other parts of the 2012 Mercedes-Benz R350
← All problems reported for the 2012 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