I think it applied to 86-89 and I'm not sure the models or whether a euro would have the same circuit. Probably would but whether it woiuld act the same way I don't know.

I doubt I'll get time soon to find the specifics. Basically the wire from terminal 50 on the starter goes to the KE controller. It passes through a connector in the fuse box on 124 cars (not sure on 126). One opens the connector and separates the two wires from the two pieces of the connector. Then take the wire to the starter and insulate it and stow it. Take the wire going to the controller and ground it.

It won't be nice if you don't follow direction. Grounding the wrong side will let the smoke out, when trying to start.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician