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Hello, my name is Bobby. Thank you for the question. I am sorry to hear about your Mercedes. Can you tell me if the check engine light comes on when driving and how many miles are on the vehicle?
Thanks for the response. I have seen a couple of issues that can cause this. Some of the time reprogramming of the modules can help, but in many cases the main control module needs to be replaced. I have also seen a malfunctioning air flow meter cause this, but most of the time this will set a check engine light also. It is hard to diagnose an issue like this if the problem is not occurring when you are testing it. You are doing the right thing in getting Mercedes involved in this.