Question about 1990 Mercedes-Benz E-Class
Defintly a valve,regulator or gas line leak,or injector leaking rail pressure
Posted on Nov 08, 2013
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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
SOURCE: My Mercedes SLK320 wont let
Not sure if it's a vacuum issue.... I will just push back the rubber seal and input the nozzle....Then it will dispense the gas....Not sure why..... It only happens at certain gas stations..
Posted on Sep 14, 2008
Either the sending unit,(this unit is on the motor)is malfunctioning, or your engine oil pump may not be providing enough pressure.
This could be due to sticky oil pressure bypass valve,,worn out pump,,or worn engine main bearings.
If it is just a case of worn engine oil bearings,this is usually indicated by high oil pressure when cold,,but low oil pressure when hot,.i wouldn't worry to much, since most engines suffer from this same complaint and doesn't harm the engine any.
Posted on Jan 19, 2009
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
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