1989 Mercedes-Benz 300-Class "wiring harness" Questions

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Wiring a 1989 Mercedes Ignition Harness Help -- To Universal I have a 1989 Mercedes 300E which has had about 15 owners, Over time the Ignition was replaced, I know this cause I ordered the Master Key ...

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Question about Mercedes-Benz 300-Class

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...wiring harness! what are your thoughts? This is how I diagnose a battery draw. Take a 12 volt test light, the kind that looks like a ice pick with a wire and alligator clip on it. Remove one of the ...

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wiring diagram of the control unit harness or connector for my MB 300E 1989. Need it to connect electronic analyzer I am developing. Any link, help? Thank you in advance, sincerely, Jose (Chile) Go to

Question about Mercedes-Benz 300-Class

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...and replace. Im sure the wires are degraded in it and the engine wiring harness as MB was forced to use by the US biodegradable insulation on its copper wires from 1993-1995 just like saab and

Question about Mercedes-Benz 300-Class

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...Fuel relays dont normally go bad fuel pumps and filters on the other hand do. Also check engine wiring harnesses for degradation as from 1993-1995 MB was forced to use biodegradable insulation on ...

Question about Mercedes-Benz 300-Class

1 Answer

...know is there anything I should be looking out for before I purchase this car. Thanks Rust, engine wiring harness upper and lower, tune service, head gasket, Plugs are correct Bosch F8DC4's or

Question about Mercedes-Benz 300-Class

3 Answers

...wiring harness, and a long list of other things were replaced with no improvement.  My experience has been the coolant sensor or coils are to blame!  Ohms check the coils as well as the ...

Question about Mercedes-Benz 300-Class

1 Answer

I replaced the fuel pumps and filter and tried to start the car and it sounded like the fuel pumps were not coming on so I ran jumper wires from an external battery to them and the car fired right up.

Question about Mercedes-Benz 300-Class

2 Answers

...and the internal plastic in the switch breaks. Although the opening and closing doors sounds like the wiring harness in the door cavity is worn and the wires are stretched or broken. Check them

Question about Mercedes-Benz 300-Class

1 Answer

...wiring. The plastic used to harness the contact pins to the switch may be delicate and are known to break. Note where they go on a note pad if such a thing occurs. Let me know if you need anything ...

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