SOURCE: ASD light is on in my mercedes 300E
First the sensor in the rear gearbox may be bad or corroded for sensing wheel speed. Also the engine wiring harness may be falling apart. From 1991-1995 the US made MB use biodegradable material on the wiring. When the insulation cracks you get shorts in the system. The same wires are in your EHA on the air inlet area. Check and replace as needed.
SOURCE: 1988 300E mercedes stereo removal
remove center console lower wood and switches, remove ash tray, remove 2 screws to remove ash tray unit. Pop off face of radio, push in plastic tabs holding radio in console and pull unit out.
SOURCE: power seats don't work on a mercedes benz 300e
most likely dirty switches or bad fuses. Try rotating fuses and then try moving them again. Corrosion on the fuses cause "gremlins" in the system. If not find a junkyard and pull out a set of used switches or try autohausaz.com for new replacements.
SOURCE: location of fuel pump relay Mercedes 300E 1993
you need to remove the cover behind the battery .
fuel pump relay ( K27 )
I hope this can help you.
SOURCE: My 1989 mercedes 300e won't start. Not getting any fuel
I had the same problem, my car would not start after parking it on the street. I followed protocol by checking vital components like spark to the plugs - OK had spark ...next was there fuel to the injectors - not sure because plug should be wet...but where dry. This can be misleading because injectors are mechanical and opens with vacuum from compression. Then I checked the two fuel pumps and one was bad, so I replaced both with a fuel filter also. The fuel relay was fine but I replaced it anyways. Now you would think it would start but no go.
At this point I was confused so I double checked all the connections electrical, fuel and so on. Luckily I stumbled onto a vacuum hose that connects from the IAC valve to the bottom of the fuel distributor that was disconnected. Wow the car started and the car is running fine, or even better. I think my problem was a combination of a bad fuel pump, vacuum leak and neglect. So try checking some of the things I did and maybe it will fix your problem.
Sincerely
Jon
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