Hey guys I have been reading through the forum the past few days and have found some good information. I do have a couple problems that I cant seem to figure out. I am working on a 1991 500 SL.

Problem one, The ABS light comes on when the car is shut off it goes out when the car is started ?

Problem two, The REC fan will not shut down. It runs when the car is on and when the car is off... It runs until the battery is dead.

Problem three, the idle control valve is also staying on constantly. With the key on and off.


I bought this car at an insurance auction, there was a small fire under the hood. The fire started in the ASR harness. We replaced the harness and any other burnt connections.

Is there an OBDII connector on this car ?

Let me know where to start...