Valve stem seals may wear and cause the engine to burn oil. this can contaminate the catalytic converter and cause it to fail.
Resources for the Repair and Maintenance of your 1991 Mercedes-Benz 560SEC
1991 Mercedes-Benz 560SEC
1991 Mercedes-Benz 560SEC Problems
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.
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.
Power steering hoses and components can develop leaks.
The timing chain and timing chain guides wear; they should be replaced every 100,000 miles.
1991 Mercedes-Benz 560SEC Questions and Answers
Anyone ever have a problem with removing the key from the ignition switch. The car is in "Park" the switch operates normally but I can't remove the key
WHAT IS THE LIFE EXPENTANCEY OF THE REAR HYDROLLIC SHOCKS, AND WHAT IS THE BLEED PRECEEDURE AFTER NEW INSTALLATION?
Blower motor does not work at any speed. Checked fuse box, inside cover says blower motor fuse outside of fuse box. so far I have not been able to locate this fuse. Any help would be appreciated. T...
Hot air is blowing suddenly I wish to charge the coolant gas but I am not able to pin point the inlet point
i used starter Spray it seems to start but it cuts off it seems that fuel is not getting to engine can it be a fuel pump or some thing like that