20 Most Recent 1990 Mercedes-Benz 190 - Page 9 Questions & Answers

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My backlight is not working and i dont know which fuse to change

not sure what you mean by backlight.. reverse light ? rear dome light? trunk light? brake light? most likely its a bulb that has blown not a fuse... if its reverse lights then you may have a bad reverse switch not sending the signal to the lights.
7/14/2012 3:39:25 PM • Mercedes-Benz... • Answered on Jul 14, 2012
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Hook up for diagnostics

the connector is under the dash on the drivers side to the left of the steering wheel (on us cars)
6/15/2012 1:21:40 AM • Mercedes-Benz... • Answered on Jun 15, 2012
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Fuse box voltage

should be about 12volts
6/4/2012 5:06:17 AM • Mercedes-Benz... • Answered on Jun 04, 2012
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Aux fan not cutting in when o/heating 1989 190E 2.6Ltr. Fans operate when tested.

Your vehicle should have a viscous fan clutch for controlling the engine temp from overheating. The auxillary fans in front are used when the a/c is on. I would start by spinning the engine fan or viscous fan by hand when the vehicle is off. The fan should show resistance when you spin it. If it doesn't and it just free spins then the viscous fan clutch is bad. Let me know what happens when you spin the engine fan and also exactly how high does the engine temp get. Does it reach the red mark?
2/25/2012 10:48:54 AM • Mercedes-Benz... • Answered on Feb 25, 2012
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Door locking system stop working and blowing fuses why?

search for short circuit.
11/29/2011 10:23:57 AM • Mercedes-Benz... • Answered on Nov 29, 2011
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