1990 Mercedes-Benz 500SL Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1990 Mercedes-Benz 500SL
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1990 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.
1990 Mercedes-Benz 500SL QuestionsI have a 1976 450-SL;what might be the problem causing a steam &antifreeze leak? (1 answer)
I have a 1976 450-SL that came out of 7yr storage. The oil, gas, plugs, antifreeze looked great. I hooked up a battery and it started right up. I let it run 5 or so times, 30min at a time each week. The last time I started it up I forgot I left it running say an hour or so. When I remembered I fo...
starting to squeak on acceleration. tension unit is broken
I jet don't trst that place where I went...my only complaint then was the hesitation so they fix a gasket that cost me around $2,000 and 2 distributor caps and EH which costed me $348.00 alone