Mercedes-Benz 300SEL Repair and Maintenance

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

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Mercedes-Benz 300SEL Problems

"No start" Caused by Failed Fuel Pump/Relay

The fuel pump and/or fuel pump relay can fail, causing the car to crank over but not start. Proper diagnoses will be necessary to confirm if the pump or relay is at fault.

Expansion valve may get stuck
The expansion valve can get stuck and is difficult to replace.
Leaks Develop at Differential Seals/Cover on High Mileage/Older Vehicles

Leaks may develop from the differential seals and/or cover on older or high mileage vehicles. Our technicians recommend a complete reseal of the differential unit when these leaks are addressed.

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Mercedes-Benz 300SEL Questions

where is the fuel pump relay located at on a 1991 300SEL (1 answer)

had been running, but taking awhile to start. Then it is just turning over and will not start at all. Put some starter in breather, no firing, just turning over

No owners manual ... Does this car have a3 or 4 speed transmission? (1 answer)

What transmission is in this car 3 speed or 4 speed?

leaking EAH valve replaced valve still leaks (1 answer)

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Mercedes-Benz 300SEL Reviews

I purchased my 1991 Mercedes-Benz 300SEL in May 2014. It is great! It was owned by one previous owner who took very good care of it. I looks great, runs great and turns many heads. It's beautiful...

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