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Resources for the Repair and Maintenance of your Mercedes-Benz 300SL

Mercedes-Benz 300SL Models:

Image for car images Mercedes Benz 1990 1993 Mercedes Benz 300 SL size thumb

Mercedes-Benz 300SL Problems

Miscellaneous -- Verified

As vehicles age, various problems may develop with the hard and soft tops. If problems are encountered, it would be recommended to have a technician familiar with these tops perform the diagnoses.

Engine -- Verified

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.

Miscellaneous -- Verified

On high usage vehicles, the ignition lock may become difficult to turn due to wear of the ignition lock and tumblers. Replacement of the ignition lock cylinder will generally be required to correct this concern.

Electrical & Lights -- Verified

The engine wiring can degrade because the insulating material falls off leaving the bare wire exposed. This can cause many problems depending on which wires are exposed and what they touch.

Brakes -- Verified

The brakes may begin to squeak at about the 50 percent wear point. This is due to the size and material used for the brake pads and rotors.  The brake rotor surfaces become uneven, causing a lip to form at the outer edge. This will generally require replacement of the rotors when the pads are worn (pad life varies depending on driving style and terrain).

Mercedes-Benz 300SL Questions and Answers

lois delgadillo, 1990 Mercedes-Benz 300SL, Snohomish, WA

car is 1983 380 sl starts up and kinda idles with a little missing

ChrisL, 1990 Mercedes-Benz 300SL, Seattle, WA

The hard top will not release at the windshield. Any ideas

380SL owner, 1990 Mercedes-Benz 300SL, Fallbrook, CA

this car is actually a 1984 380SL . It only blows cold air and no warm or hot air at all, even in the heat position. I wonder if the diverter door is stuck.....or..... any help out there? Just pu...

Visitor, 1990 Mercedes-Benz 300SL, North Hills, CA

Where is the oil filter located

Visitor, 1990 Mercedes-Benz 300SL, Teaneck, NJ

soft top does not open. Replaced switch control modual was
rebuilt

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Mercedes-Benz 300SL Reviews

air conditioner not cold blowing cool

my 1991 300 sl was experiencing symptoms of running fine when cold, and breaking up and stalling when engine got warm. changed crank sensor, no fix, still getting stuck on many occasions. car wold only start when it cooled off. thought it had to do with some kind of temperature sensor..changed fuel filter, and the problem went away. driven hundreds of miles trouble free now..car often sits for few weeks at a time, especially in winter. love this car..two tone black, silver body color..looks awesome, also has adaptive damping option, which I'm told is rare for a six cylinder..a keeper!!

My 1991 SL mercedes is a beautiful car. When it sits for a long period, once driven, it cuts off. The car will start after sitting a couple of hours. Restart car and drives fine.

Nice car but does have a number of issues after 20+ years. There is a wealth of information and help on the MB forums. The bad "green" wires came in 1994 for a few years. And, EZL's do NOT explode. (Where does this stuff come from?)

the best car I ever had

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