Mercedes-Benz 400SEL Repair and Maintenance

A guide to problems, costs, maintenance and repair for your Mercedes-Benz 400SEL

Problems with the pneumatic system can cause closing assist and door lock issues.

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.

High mileage vehicles may develop a transmission fluid leak from one or more of the oil seals.

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ok hello i have a 1993 400sel it has a problem with spark plugs, I replaced with new ones and the car is backfiring. i used ngk preset spark plugs, it was running fine for a few days when i was driving it around the block, but now it has began backfiring and will not fully start... I just bought ...

sometimes they work and at times do not work.

how can I check ,fuse ok, how do I jump compressor, Help

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