Mercedes-Benz 300SL Repair and Maintenance

A guide to problems, costs, maintenance and repair for your Mercedes-Benz 300SL

Mercedes-Benz 300SL Problems

Hard/Soft Tops May Develop Problems Due to Age

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.

Repair Leaks From Head Gasket/Timing Cover Gasket Before Oil and Coolant Intermix

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.

High Usage Vehicles May Experience Ignition Lock and Tumbler Failures

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.

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Mercedes-Benz 300SL Questions

Where are the fuses located (2 answers)

1991 300 sl has spark ignition fuel compression is in time cranks but wont start (1 answer)

was running great parked for a week would not start. replaced distributor cap and rotor, cam and crank position sensors. ecm and ezl checked all fuses has correct fuel pressure showed code for oxygen sensor which was also replaced along with ignition switch. mechanic has gave up on vehicle

How do I change the check engine light (1 answer)

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Mercedes-Benz 300SL Reviews

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......
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?)

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