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.
Car Problem Reports
Mercedes-Benz SLK280 Camshaft Adjuster Solenoid Failure
Mercedes-Benz SLK280 Problem
Average Mileage: 75,333 mi (45,000 mi - 117,000 mi)
Intermittent check engine lights. Engine feels like it has a low idle miss, kind of jerks a little bit at idle in drive with brake on. Has occassionally acted as though a cylinder was entirely missing but I also had a different code at that time which could indicate a faulty coil.
Visitor, 2006 Mercedes-Benz SLK280, 45,000 mi
Mercedes said this wasn't why the check engine light was coming on so 702.00 later ugh. But did do recall on solenoid
Visitor, 2006 Mercedes-Benz SLK280, 117,000 mi
Vehicle has check engine light on. Also developed shifting from first to drive stalling and not exceed 20 mph.