Question about 1990 Mercedes-Benz E-Class
Posted by Anonymous on
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Posted on Jan 02, 2017
I think it should be as follows:
Left speaker ground Brown
Right speaker ground Gray.
The cable to the fader in the center console color may vary
Left + is Black/Green or Grey/Brown
Right + is Black/Red or Brown/Red
On this website instead (click here ) you can buy the complete wiring diagrams for $4
Posted on Jun 03, 2008
It sounds like a fuel delivery issue. Mercedes recommends replacing the fuel filter every 60k. If it has been longer than thast since the filter change start there. Fuel pump relays are another common problem on this era. They are located behind the battery. Remove the plastic cover and you will se 2 black relays( yours may have a mass relay if it is a 90 model year, it will have a plastic knob on top that you turn to the left to unsecure it) IT will say kickdown on it the climate control is the other relay and it will say klima. Look for signs of corrosion on the solder pins. If your fuel pump(located at the right rear) is very noisy when it operates I wouild recommend replacing it. During this era of Benz about the only way to diagnose this would be to run a bunch of fuel pressure tests and to drive vehicle with a meter on the relay and on the pump to see if the relay cuts out or the pump cuts out. I always recommend to do both pump and relay because they can cause one another to fail. good luck.
Posted on Sep 19, 2009
Relay isnt usually the issue. The Klima relay should be on the passenger side behind the battery. Also another relay is under the screwed down cover behind the fuses. Normally the comprssor will not engage due to low pressure or bad pressure switch on the drier. Could also be the speed gage integrated to the compressor. Leak of the freon is normal but f it comes out as fast as it goes or just fast then the evap in the dash is most likely bad.
Posted on Jun 24, 2010
Testimonial: "very informative and much appreciated."
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