I seem to be having a problem with my power convertible top onmy 1990 300sl. What seems to be happening is it runs and runs and runs until my battery is run down and thre is nothing left to draw. I can hear a noise that kicks on and off coming from the box in the right side of the trunk which i am assuming is my covertible top motor. If anyone can help me with fixing this problem i would appreciate it greatly. thanks ~alex