Mercedes Repair Questions? Ask a Mechanic for Answers ASAP
My name is ***** ***** I am a professional here at Just Answer. I noticed that your question had not received a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.
If you are saying here that the car starts but does not accelerate when the gas pedal is pressed this can be due to a fault with a faulty accelerator pedal sensor at the gas pedal itself.This can fail commonly internally needing the entire pedal assembly replaced.If this has not been checked this needs done.If this is or was checked and found to be o.k. let me know so we can continue.You would need to have the fault codes read out/checked with a compatible scan tool or dealers sds machine to see if any codes are set related to this fault here as well as the scan tool used to monitor the pedal sensor signals.
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