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Ask Michael Warfield Your Own Question
Michael Warfield
Michael Warfield, Factory Mercedes-Benz Technician
Category: Mercedes
Satisfied Customers: 3130
Experience:  Mercedes-Benz Master Certified technician
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My 2000 Mercedes Benz s500 when I starts up my car it's

Customer Question

My 2000 Mercedes Benz s500 when I starts up my car it's start up fine but when I go to turn it off t it wouldnt cut off .even after I take the key out of the ignition it still wouldn't cut off what could be the problem ?
Submitted: 1 year ago.
Category: Mercedes
Expert:  Michael Warfield replied 1 year ago.

This is an engine network malfunction that happens when the car is running. The ignition switch signal to shut off the engine never makes it to the engine computer. Typically the gear shifter is the cause of the problem. It creates "noise" on the network communication lines not allowing some signals to get through. I know this from experience because I have had it happen on several S class models around your model year. Of course a definitive diagnosis would require some extensive network testing while the problem is happening. The shifter can only be ordered from a dealership and has to be programmed with a mercedes computer which can get expensive. Expect in the $1000-1200 range.

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