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.

Engine Oil and Coolant Leaks Resulting in Fulid 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.

Bad Switch/Blower Motor Resistor Assembly May Cause Inoperative Heater Blower Motor

Other than a defective motor, a bad switch or blower motor resistor assembly can cause an inoperative heater blower motor.

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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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