2006 Mercedes-Benz E350 Q&A
2006 Mercedes-Benz E350 Question: service engine light
This is likely a check engine light: http://repairpal.com/check-engine-light However, your car has a very advanced maintenance minder that tells you when you are due for service, so you may just be due for scheduled maintenance. Either way, it's time to visit a shop for service or repair. - matte
The camshaft adjuster solenoid (which is related to the variable valve timing system) may fail...