The camshaft adjuster solenoid (which is related to the variable valve timing system) may fail or timing chain/balance shaft components may wear, resulting in illumination of the Check Engine Light and various drivability issues. Mercedes-Benz has released a service bulletin outlining specific repair instructions depending on fault codes stored.
Resources for the Repair and Maintenance of your 2009 Mercedes-Benz R350
2009 Mercedes-Benz R350
2009 Mercedes-Benz R350 Problems
Vehicles equipped with a 7-speed automatic transmission may develop a rough shifting condition, most commonly going up from first to second gear and going down from third to second or second to first gear. Our technicians tell us this is due to an internal component failure. Mercedes has released updated parts; the transmission will need to be removed and disassembled to complete the necessary repairs.
A problem with the ball joints can cause a creaking noise. There is an updated part to remedy this problem.
The crankshaft position sensor may fail. Symptoms of this are: The engine will crank—but not start—especially when the engine is warm. The car may start again if it is left to cool off, but it may run roughly or have poor performance. Communicating these specific symptoms to your technician can save diagnostic time.
As a way to increase braking performance, the brake pads and rotors are make of a softer material and may be in need of replacement after approximately 20,000 miles; owners should be vigilant about getting their brakes checked.
2009 Mercedes-Benz R350 Questions and Answers
My husband has his own shop and does the maintance work on my car. He has not read the manual as to how to reset the warning system after an oil change. Thought I would make his life easier.
My R350 is about to go out of warranty, 49,850 miles , and I have replaced the headlights and tailights. All under warranty but I have 2 other MB and never replaced one light. don't want thi...
My R350 needs a wash, but what's got me baffled is that the front wheel rims are a LOt dirtier then the rear wheel rims; my husband is concerned that it may have something to do with the brake...