1990 Mercedes-Benz 300SEL Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1990 Mercedes-Benz 300SEL
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1990 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.
1990 Mercedes-Benz 300SEL QuestionsNo owners manual ... Does this car have a3 or 4 speed transmission? (1 answer)
What transmission is in this car 3 speed or 4 speed?
And if so is it better to buy a brand new one or is getting a rebuilt one just as good thanks and I look forward to my answer