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 500SL
1990 Mercedes-Benz 500SL
1990 Mercedes-Benz 500SL Problems
High mileage vehicles may develop a transmission fluid leak from one or more of the oil seals.
As vehicles age, various problems may develop with the hard and soft tops. If problems are encountered, it would be recommended to have a technician familiar with these tops perform the diagnoses.
The bushings for the shifter lever wear out to the point where they break and fall out. This causes excessive movement (loose feel) in the shifter lever and a clanging-type noise when changing gears.
The engine wiring can degrade because the insulating material falls off leaving the bare wire exposed. This can cause many problems depending on which wires are exposed and what they touch.
1990 Mercedes-Benz 500SL Recalls (Recent)
Summary: DURING THE REMOVAL AND INSTALLATION OF THE AIR FILTER HOUSING WHILE SERVICING THE VEHICLE, IT IS POSSIBLE TO MISROUTE THE PREFORMED VACUUM HOSE AND DAMAGE THE CHECK VALVE IN THE VACUUM HOSE. IF THE CHECK VALVE IS DAMAGED, LOSS OF SUFFICIENT BRAKE POWER ASSIST WILL OCCUR.Learn more »
1990 Mercedes-Benz 500SL Questions and Answers
yearly cost of repairs expected on a 1989 560sl with 100k miles. driven 5k miles per year. Any estimation or insight would be appreciated. well maintained vehicle.
The convertible doesn't open. A six sided alan wrench bolt on the locking-arm is striped. I need a diagram of the mechanism for the opening and closing mechanism on the convertible roof.
no turn single all other light work /where is hazard light reley
the rubber boot connected to the bottom of the intake manifold is cracked and need to be replaced. do I need a special tool? does anyone have step by step instructions? A vacuum diagram would be he...