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 ProblemsFaulty Mass Air Flow Sensor Causing Erratic Engine Operation and Poor Fuel Economy
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.
Internal and External engine oil & coolant leaks can develop from the head gasket and/or timing cover gasket; these leaks should be repaired before the engine oil and coolant intermix which can result in severe engine damage.
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.
1991 Mercedes-Benz 500SL Questionswhere can i get a lighted star for my grille? (1 answer)
All of my interior dashboard lights are not working but the fuse is fine. Any suggestions?
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