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.
Check Engine Light Due to Faulty Camshaft Adjuster Solenoid on Mercedes-Benz S550
Average mileage: 95,892 (55,000–190,000)
16 people reported this problem
6 people shared problem details
2007 Mercedes-Benz S550102,000Visitor
All the same damn problems. One after another. Car cost way too much to have all these damn problems. Mercedes Benz should be ashamed of themselves. Someone or all @ Mercedes need their asses kicked or do something about it!!. MAJOR RECALLS!!
2007 Mercedes-Benz S55083,300Visitor
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
2008 Mercedes-Benz S55055,000Visitor
All of a sudden, my car wouldn't start....it would take me 15 mins. to get it started. I changed the crankshaft position sensor......it still won't start and the check engine light is back on.
2008 Mercedes-Benz S550116,000Visitor
Just had it check.the check engine like comes on then goes off. The code came back retard belt camshaft. Taking it into mechanic.
2012 Mercedes-Benz S550Visitor
Check Engine Light came on shortly after purchased the vehicle. The dealer said it was always a emission issue and the gas cap was probably not on tight. This was not the case. The 2nd time it went in the shop for the engine light, the dealer said an update had to be installed. The 3rd time the engine light came on, they said it was a part that had to be replaced. The 4th time, they replaced another part, and it seems to have worked this time.
2007 Mercedes-Benz S55087,625Visitor
check engine light on and stayed on
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