Mercedes-Benz 300SL Repair and Maintenance
A guide to problems, costs, maintenance and repair for your Mercedes-Benz 300SL
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Mercedes-Benz 300SL 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 refrigerant leak may develop from one or more of the following AC components: AC compressor, hose manifold for the compressor, or the evaporator core. The loss of refrigerant can cause poor AC performance. Our technicians tell us that proper leak diagnoses should be performed in order to determine the cause of any refrigerant loss.
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.
Mercedes-Benz 300SL QuestionsMy 300SL has stalling problems at all speeds.This is dangerous. (1 answer)
The car also has hard start problems and spongy brakes.The stalling problem occurs most at high speed when decelerating.The car runs fine otherwise.It does not leak oil or any other fluids.
was running great parked for a week would not start. replaced distributor cap and rotor, cam and crank position sensors. ecm and ezl checked all fuses has correct fuel pressure showed code for oxygen sensor which was also replaced along with ignition switch. mechanic has gave up on vehicle