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.
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.
Other than a defective motor, a bad switch or blower motor resistor assembly can cause an inoperative heater blower motor.
Mercedes-Benz 300SEL Questionswhere 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
What transmission is in this car 3 speed or 4 speed?