1990 Mercedes-Benz 300SE Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1990 Mercedes-Benz 300SE
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1990 Mercedes-Benz 300SE ProblemsBad 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.
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.
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.
1990 Mercedes-Benz 300SE QuestionsMy MB is a 1988 300se with 14K miles .when timing belt needs replacement? (2 answers)
HOWEVER, THE ["BRAKE-PADS"] ARE LOCKING ON THE ROTORS & WILL NOT RELEASE THEMSELVES. SO, WHAT COULD BE THE CAUSE THIS-PROBLEM?