2009 Mercedes-Benz R350 Engine cooling Problems
- Complaints
- 1about this part
- Share
- 7%of 15 total for the year
- Median mileage
- 3,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the engine cooling of the 2009 Mercedes-Benz R350, 7% of the 15 complaints for this model year. Where a mileage was given, the median is 3,000 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.
“Wife is disabled with a back injury lumbar support has failed 4 times in 7 months part was finally ordered from germany and the item seems fixed whining noise comes from under the hood. Mercedes engineer says it is a AC pressure release valve...and refuses to fix it again.....car was in the dealership 4 times for this.”
NHTSA complaint #10347761, filed 2010-08, 3,000 milesRelated service bulletins
- 10248173Dec 11, 2023Mercedes-Benz AG ("MBAG"), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (âÂÂMYâÂÂ) 2009-2012 GL-Class, ML-Class, R-Class, and…
- 10205147Nov 14, 2016Ticking or pulsing noise from high-pressure pump and/or fuel injectors.
- 10135632Oct 14, 2014Fault in particulate sensor
- 10166980Feb 10, 2014Traces of oil in area of oil cooler (inner V) on engine 642
- 10166978Feb 6, 2014Engine diagnosis warning lamp lights up - Fault code entry (FC) 14A600 or 14A700
- 10167554Jul 10, 2013Engine diagnosis warning lamp activated. Fault code P045600 "Very fine leak" or P044200 "Fine leak" stored in engine control unit.
- 10039256May 31, 2011Mercedes-benz: the malfunction light is on with multiple possible trouble codes stored. There could be a problem with the camshaft and/or scoring of a piston.
- 10041208Mar 30, 2011Mercedes benz: engine light is on with stored trouble codes.
- 10038227Dec 8, 2010Mercedes-benz: the starter clicks but does not crank when trying to start. A voltage dip is causing the ignition procedure to fail.
- 10034625Feb 22, 2010Mercedes (xentry): engine makes noise, ticking/crackling at idle speeds up to approx. 1500 rpm. Run in effect of 1st crankshaft main bearing. Models 211, 219, 164, 251, 203, 204…
Engine cooling: other model years
Other parts of the 2009 Mercedes-Benz R350
8 complaintsVisibility (wipers, defrost, mirrors)
3 complaintsElectrical system
1 complaintsExterior lighting
1 complaintsFuel system
1 complaintsOther or unknown
1 complaintsSeat belts
1 complaintsSeats
1 complaintsBody and structure
1 complaints
← All problems reported for the 2009 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