Other than a defective motor, a bad switch or blower motor resistor assembly can cause an inoperative heater blower motor.
Resources for the Repair and Maintenance of your 1990 Mercedes-Benz 560SEL
1990 Mercedes-Benz 560SEL
1990 Mercedes-Benz 560SEL Problems
On high mileage vehicles, rear spring wear may cause the rear end to sag.
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.
One or more door windows may stop working due to a failed window regulator. Replacement of the failed regulator will be necessary to correct this concern.
Power steering hoses and components can develop leaks.
1990 Mercedes-Benz 560SEL Questions and Answers
At times, when accelerating, the economy gauge will go up but the RPM's do not move and the car hesitates.Only lasts a couple secods and resolves it self. Fuel filters have been changed within...
am going down the road and car just cuts off stalls i pull over it start..some time i come to a stop it stalls some times takes 2/4 min to start
The car runs good and strong but will not stay running unless the gas peddle is gently held its like it needs to be idle up i can hold the air intake flap down 1/4 inch and it will idle just find...
camshaft timing marks
1990 Mercedes-Benz 560SEL Reviews
This is a great car that is reliable, the main issue to this model are the standard high-mileage leaks from the valve cover gaskets. Some dealer parts are actually cheaper than aftermarket. In comparison to the 1994 BMW 740iL, it is cheaper to maintain and eventhough it has a 5.6 litre engine, burns less fuel.