2006 Mercedes-Benz R350 Engine cooling Problems
- Complaints
- 16about this part
- Share
- 16%of 99 total for the year
- Median mileage
- 62,000miles
- Trend
- StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.
NHTSA recorded 16 complaints about the engine cooling of the 2006 Mercedes-Benz R350, 16% of the 99 complaints for this model year. Where a mileage was given, the median is 62,000 miles.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“My car has always been service by mercedes dealership. I barely drive my R350 mercedes. My check engine light came on and I was told that my balance shaft and intake manifold needed to be replaced. The dealer said its a common problem that occur with the 2006 and they are not sure why its not a recall.”
NHTSA complaint #10413833, filed 2011-07, 80,000 miles“My engine warning light came on. I was told that the strut had gone bad and the cam in the engine went bad. I was told by the dealership that is normal in the 06 R350 and they are not sure why it hasn't been a recall. Im upset because im viewing your website and other sites that are design for other owners with the same vehicles and they are showing the same problems.. What will it take to get a recall on this before someone gets hurt.”
NHTSA complaint #10452935, filed 2012-03, 51,000 miles“My 2006 mercedes benz R350 was diagnosed with a counter balance shaft/gear problem. It has 85000 miles... Which doesn't seem like a lot for a car that is 5 years old and supposed to last forever. Plus I have maintained the car with oil changes, tires, etc and am the original owner. I see on line that there is a class action suit pending . I believe a $5000 repair is way too much and the company should take responsibility.”
NHTSA complaint #10420817, filed 2011-08, 80,000 miles“On september 19, 2010 I started up my vehicle and notice a check engine light appears on my dashboard. I drove the vehicle for two more days and the light disappeared. And then on the fourth day the light appear again. I immediately contact the mercedes benz service and asked the about the check engine light. I was informed not to panic it's probably the gas cap not properly on or since I was away for one week and my vehicle was parked in the garage maybe that is why the check engine light is on. …”
NHTSA complaint #10362659, filed 2010-10, 54,000 miles“Check engine light came on, took the car to my mechanic that works on foreign cars, he informed me that my drive cam shaft is retarded basically stating that my sprockets that hold the timing belt are worn down, I am also loosing compression. I took it to the mercedes dealership and they told me they will goodwill the repair if that is really what is wrong with it. They however proceeded to tell me that your car has almost 100,000 miles on it, so it may just be the timing belt is worn down.(they will try anything to get out of the repair). …”
NHTSA complaint #10450538, filed 2012-03, 92,261 milesRelated service bulletins
- 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.
- 10033070Dec 16, 2009Xentry (mercedes): engine warning lamp is currently on or was on and a delay fault of the camshaft adjust to current or stored in the engine control unit. Models 171, 203, 209…
- 10028026Aug 1, 2008Mercedes: replace v belt upper guide pulley. The v belt upper guide pulley optimized for noise reduction is available. The dealer will replace upper guide pulley at the next…
- 10022893Apr 24, 2008Check engine light on / fault codes fc1200 / fc1208 stored in me-sfi control unit. Mercedes-benz model c230, c280, c350, slk280, slk350, clk350, clk550, e350, e550, cls550, s600…
- 10021227Aug 1, 2006Install shim plates between front exhaust system brackets and transmission.
Engine cooling: other model years
Other parts of the 2006 Mercedes-Benz R350
26 complaintsEngine
17 complaintsElectrical system
14 complaintsTransmission and drivetrain
13 complaintsSeats
9 complaintsExterior lighting
7 complaintsSteering
5 complaintsFuel system
4 complaintsOther or unknown
4 complaintsAir bags
3 complaintsBrakes
3 complaintsBody and structure
3 complaints
← All problems reported for the 2006 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