I have a 1991 240DL station wagon, and the seat heater comes on at inappropriate times, like when it's 90 degrees outside. I can't find a button or control knob to turn it off.
Not only is it uncomfortable, but I'm going thorugh 16 amp fuses pretty fast - it keeps blowing the fuse. Normally, that would be a good solution (I think) except that when the seat heater fuse is blown, my car windows won't work.