I have a 85 Mercedes 300SD engine #617.951, and about a week or so, the only way that I could stop the engine from running, was to pull the hood open and hit the stop switch, even though I had already turned the key off and gotten out of the vehicle.
Is this an old "shady-tree" mechanic can fix or do I have to do the "two step" to the dealer????
I can be reached at [email protected] or [email protected].
Would like to fix ASAP 'cause it is getting tiresome putting my arm in the engine compartment after pulling up the hood.

Can someone help me?????