What does a defroster and 4th gear have to do w/ each other???
I have a 1990 240DL wagon w/ auto. It was running fine until yesterday. The car started fine but when I pushed the rear defroster button the Shift light came on like I had pushed the O/D Off button. Now the car won't shift into 4th (O/D) and the rear defroster does not work. There used to be an audible click when I pressed the O/D Off button, but now there is nothing except a light staring right at me. I can't find any blown fuses, but I don't know where all the relays are for this car. I found the relay for the rear defroster under the dash next to the steering column. It clicks when I press the defrost button but that's about it. Everything else in the car seems to be fine. Any ideas?
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