Question about 1991 Mercedes-Benz Mercedes Benz 500 Class

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Mercedes benz 500SL .1990. no problem starting when cold. when warm will not start . any suggestion please. george.

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There could be a problem with the crank position sensor

Posted on Sep 06, 2010


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500SL 1990 115,000 miles. Has suddenly developed a much lower exhaust note than normal. Engine has started to 'surge' every few seconds, for around 2 seconds from 600RPM to 900RPM. Is using excessive fuel...

Check for a vac leak. Check all small vac lines, Benz is noted for plastic lines that crack. Look closely around air filter and work your way out from there. Also run a bottle of STP gas treatment through it. This time of year with big temperature swings, condensation (water) forms in fuel tank and that wreaks havoc with Benz induction.

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I have a 1990 merc benz 500sl that runs hot.I have replaced the thermostat the water pump and made sure that the right coolant was in the system(wrong coolant was in before i started,the car had this...

Ok you have a viscous fan, roll up a newspaper and while running try and stop the fan if you can all the oil has leaked out of it and should be rebuilt or replaced. Also temp sensor which there are 3 of may be bad. Make sure your electric fan/fans are turning on if not check the strip fuse on the firewall by the brake booster in a black tootsie roll sized case. Also check the resistor block under the drivers side headlight area because it can go bad and the fans wont get power. Also age of the radiator can mean scale from non distilled water being in the system reduces it effeciency. Also cap not holding pressure or cracks in the radiator or reservoir will cause loss of pressure and boiling of coolant.

Jun 17, 2010 | 1990 Mercedes-Benz Mercedes Benz Sl Class

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I need to know how to tighten the serpintine belt. On a 500sl 1990 benz

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Apr 17, 2010 | 1990 Mercedes-Benz Mercedes Benz Sl Class

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Apr 07, 2010 | 1991 Mercedes-Benz Mercedes Benz Sl Class

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Cold start is fine but after warm start the engine misses and sta

I would start by changing the fuel filter then check to see if there is any water in the fuel if those are ok see if a critter built a nest in the air filtter or the exhaust.

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Jul 11, 2009 | 1987 Mercedes-Benz Mercedes Benz 500 Class

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Near the battery. However if you are saying no sparks then check the induction coil which generate these sparks..........sodeep

Jun 23, 2009 | 1987 Mercedes-Benz Mercedes Benz 500 Class

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I just had the same problem. All of the fluid leaked out and I had to get the three small engines that move the top replaced. It was about 2200. I hope this helps

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