Report: Camshaft Adjuster Solenoid Failure
Mercedes-Benz S550 Problem
Average Mileage: 81,185 mi (63,000 mi - 100,000 mi)
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.
Visitor, 2007 Mercedes-Benz S550, 87,625 mi
check engine light on and stayed on
Visitor, 2007 Mercedes-Benz S550, 83,300 mi
S550 4MATIC; The sensor for the idler pulley was causing a failure; dealership changed the solenoids, which didnt fix the problem, now they want to dig deeper into the engine! Pretty sure Mercedes doesn't want to recall the part because of cost and reputational damage but it is a common problem