Quote:
Originally posted by Zlatko
Wassup guys.
Are there many electrical issues with this car? cause my electronics seem to be very badly degraded..
-Oil Pressure guage goes up and down when i flick on the headlight switch to the middle position..so the headlights arents up..but just the interiour lights
-My oil and E-brake light turn on AT THE SAME TIME when i push the clutch to stop the car at a red light..This always happens when my rpm is below 1k.
-My RPM is bouncing...Normally..under the hood..the car's idle rpm should be between 850 and 950. My car idles at 1k. Also the rpm bounces like 50 rpm when the clutch is down...And also this stops happening when the electrical fan turns on :|
-My car gets TERRIBLE gas mileage. :| I put in 55 liters of gas..and im gonna get about 280-300 miles on it at MOST :| Is this normal? I used Penzoil fuel injector cleaner..and it HAS gotten a BIT better..but it's still really bad...and i dont drive the car hard..my consumption meter is always at around 30 MPG.
-My fog lights seem to be not working. I dont know if the light bulbs are burnt out..our my fuse is blown...I checked out the fuse..it seems to be in good condition..When i press the foglight button..i can hear the relay click in the background..
Id appreciate ANY help guys 
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In no particular order some answers that may point you in the right direction.
Electrics are a little under par for a German prestige car. The wires are so thin that I thought they were silver wires when I first got the car. Electrics do suffer. Grounds are a particular cause of woe. The grounds from the rear of the engine area (thick brown wires) that mount to the firewall frequently give grief and often require a supplementary earth. Poor tick over and starting are symptomatic of this problem.
I'm wondering if your tick over problem is down to this. If the ground starts to deteriorate the tick over often begins to stumble (stalling even). To compensate for rough tick over people (like maybe the previous owner) sometimes adjust the tick over screw (brass screw on the throttle body) to get the tick over past the stumble - say at 1,000 rpm.
This may work in mild earth problems but as soon as you put a heavy load on the electrical system (your fans coming on, for example) it'll drag everything down and your tick over will lower noticeably (becomes very rough).
The battery earth and the headlight earths often need replacing / cleaning too.
The oil and brake warning lights coming on together could be down to a short somewhere or, and you should check this right now, it could be two faults occurring at once:
If your oil is very low, below the minimum level say, then it could be that the scavenger is just about sucking up oil under even driving conditions but failing to under surge - hence the warning light coming on when you hit the brakes. If your brake pads are badly worn then it's no coincidence that the warning light comes on when you brake. You need to check this right this second for the sake of safety and your engine.
Fog lights. Check the bulbs and then the grounds and work back from there. It's also worth chucking out all the fuses and sticking in new ones right from the get go as their conductive surfaces often tarnish. Horrible fuses they are too.
Not sure about US imports but when you put the light switch on the middle position on a Brit car the parking lights come on - irrespective of whether the key is in the ignition.
Hope that's of some use.