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Resources for the Repair and Maintenance of your 1990 Mercedes-Benz 300SL

1990 Mercedes-Benz 300SL

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1990 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.

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.

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.

Engine -- Verified

Motor mounts commonly fail, causing engine vibrations to be transferred to the body. Failed motor mounts should be replaced in order to prevent damage to the transmission mount.

1990 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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1990 Mercedes-Benz 300SL Reviews

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

1) the electrical wire issue. Basically this makes the car a rolling wreck with it only a matter of time before they short out and your entire computer system and or EZL explodes...anyone out there care to guess how much that would cost (an EZL for this particular car is extremely expensive) I was told that the insullation was designed to be GREEN and biodegrade...which is why it falls apart...I really think Mercedes owes anyone still owning/driving some sort of help on this

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