Have Mercedes Questions? Ask a Mechanic for Answers ASAP
Hi my name is ***** ***** I will be happy to assist with this today.In some cases I may need more info to assist better.I apologize for any delay.
The first thing to check here is to make sure the air inlet from the engine air filter is o.k. with no leaks.If this is o.k. make sure the belt is routed properly.If this is all o.k. there is a chance that there is a leak with the intake/inlet manifold.If the gaskets are leaking this can cause this as well here.There is some testing I can post here if you like on this fault code for this model here just let me know.It will lead to the cause for this issue but would need followed fully to pinpoint the issue and may require tools like a vacuum gauge,scan tool and electrical test equipment.But usually when a code sets like this after a repair like this has been done this can indicate an issue with a vacuum leak or leaking boost pipe or something left disconnected.
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Your welcome Dave.In some cases a smoke machine is needed to inject smoke into the intake to locate any hard to see leaks needing repaired.
Let me know if you need anything else and feel free to rate my help here as this is how I receive credit for my time.Your 5 star rating is appreciated