I have a 1995 E300D that has intermittent electrical problems which seem to be related to my ignition switch. Usually the problems occur after the car has been parked in the hot sun. Most common problem is that the radio looses power, it keeps coming on and off especially at low RPM. Once I lost all dash lights, then the next morning everything was fine.
Most recently and it is not fixing itself is that the electronic shut off on the fuel injection pump is not working and I have to turn the little black knob over the fuel filter to starve the engine out to stop it. Also but probably not related, the AC clutch is not turning on.
Is there some kind of know mechanical or electrical problem with the ignition switch or some kind of harness problem (bad crimping of connectors, etc.?) that could be causing this?