where is the main ground to a 1989 190e ?? also my fuse to my windshield wiper keeps blowing how can i fix that is it a ground problem? please get back at me this is important every time i put in a new fuse it smokes up and i dont want to start a fire thank you

seems to me you could just make a new ground by running a wire from the engine to the cars chassis.

the wiper motor might just be drawing too many amps, might be time for a new one.

Ditto on the "too many amps" - a faulty ground will not cause a fuse to blow.

Which "main ground" are you referring to, and what kind of problem are you having that you need to know where it is? (I don't know where it is offhand, btw - I'm not just being difficult)

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A.S.E Tech A1,A6,A7,A8 & MVAC 609 + EPA 608

Unless stated otherwise, any question I ask is about my greymarket 1985 380SEL.

the main ground... my lights only come on when they feel like it and my winshield wiper wont work if i knew the ground i was looking for i wouldnt ask would i? hehehe

are those on the same circuit? if so, it almost sounds to me like you have a wire shorting on another in that circuit. or, if they arent on the same circuit, they may just be running by each other in the car, and could be touching.

might be time to just start tracing wires, Id start with the wiper motor feeds, trace em all the way back.