1991 Mercedes-Benz 500SL Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1991 Mercedes-Benz 500SL

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1991 Mercedes-Benz 500SL Problems

Bad Switch/Blower Motor Resistor Assembly May Cause Inoperative Heater Blower Motor

Other than a defective motor, a bad switch or blower motor resistor assembly can cause an inoperative heater blower motor.

Emissions-related ports in cylinder head may clog

Ports in the cylinder head related to the emissions air injection and EGR systems can clog; the cylinder head should be removed and the ports cleaned.

Erratic Engine Operation and Poor Fuel Economy Due to Faulty Mass Air Flow Sensor

A faulty mass air flow (MAF) sensor can cause erratic/rough engine operation and fuel economy issues. Since this sensor measures the actual amount of air entering the motor, when it fails, the engine control module (ECM) takes the wrong information and delivers incorrect volumes of fuel to the cylinders.

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1991 Mercedes-Benz 500SL Questions

where can i get a lighted star for my grille? (1 answer)

Dash Board Lights (2 answers)

All of my interior dashboard lights are not working but the fuse is fine. Any suggestions?

Have a 91 500sl has symptoms of crank position sensor failure . (1 answer)

it will start and run fine till gets to operating temp then stalls and is hard to start till it cools off . I replaced the crank position sensor and still have the problem . Is there something else I have missed ? Possibly the cam sensor

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1991 Mercedes-Benz 500SL Recalls

Recall 93V067000
DURING THE REMOVAL AND INSTALLATION OF THE AIR FILTER HOUSING WHILE SERVICING THE VEHICLE, IT IS POSSIBLE TO MISROUTE THE PREFORMED VACUUM HOSE AND DAMAGE THE CHECK VALVE IN THE VACUUM HOSE. IF THE CHECK VALVE IS DAMAGED, LOSS OF SUFFICIENT BRAKE POWER ASSIST WILL OCCUR.

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1991 Mercedes-Benz 500SL Reviews

I just had a major problem my car just started blowing blue-white smoke only when I give it gas to take off took it to the shop my mechanic is pretty much like the engine is gone val seal but all my transmission fluid gone out of car also but I check all my fluids two days ago all was fine then yesterday it started smoking no los of power need some kind of help I think mechanic is trying to get...
I have been a Mercedes Benz Owner since The Early 196'0 And I can not Fault The Quality of The Mercedes, This is the first Mercedes SL 500 Convertable, that I now own, amongst 2 other Mercs which I currently own, I Find The SL 500 lots of fun to Drive, and highly recommend the Vehicle to any-one who belives in SAFE PRESTIGE MOTORING. It is a Great Car/Roadster.it Performs when you require it to...

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