Have Mercedes 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.
This may be an issue with the electronic ignition switch itself not sending a signal intermittently causing a no crank issue.I have also seen issues with the ME (engine computer) that can cause this as well needing replaced.I would have the fault codes checked/read out to see what codes are set with this fault here then those codes diagnosed to help locate this issue.This may also take some electrical testing to help locate the issue here.
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Have you had the fault codes checked at all to see what codes are set using a scan tool or dealers sds machine that can plug in and communicate with all computers?