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Mercedes-Benz E550 4MATIC Problems

Check Engine Light Due to Faulty Camshaft Adjuster Solenoid on Mercedes-Benz E550 4MATIC

Problem Description and Possible Solution

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.

(6 people reported this problem)

Mercedes-Benz E550 4MATIC Vehicles With This Problem

RepairPal Verified
Average mileage: 95,000 (95,000–95,000)
4 model years affected: 2007, 2008, 2009, 2010
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CEL on/off intermittently. Code indicates timing issue pointing to camshaft solenoid. Sometimes CEL off for months before coming on briefly (a few days to a week or two). Drivability not affected so I didn't repair for a while. Recently noticed minor rough idle, especially during cold weather. Originally told camshaft replacement ($$$) but having magnets replaced today by local excellent mechanic shop specializing in MB for about $485 in hopes that this resolves the issue. Will update...