1991 Mercedes-Benz 300SEL Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1991 Mercedes-Benz 300SEL
Never overpay. Check prices with our estimator
Verified by mechanics, reported by drivers like you
Ask a mechanic in our community
1991 Mercedes-Benz 300SEL ProblemsFuel system components may leak and cause hard starting problems
Other than a defective motor, a bad switch or blower motor resistor assembly can cause an inoperative heater blower motor.
A rough running motor or lack of power can be caused by a failed distributor cap or rotor, ignition wires (or their resistors), or valve cover gasket leaks. If the valve cover gasket leaks, oil can pool where the ignition wire resistor connects to the spark plug. The resistor can fail and the spark plug may not fire because of a short circuit through the oil.
1991 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
Emer.brake switch works
no fuel is present at end of fuel line before injecter.Presure present at distributor