recently purchased a bmw 320cd motorsport convertible and on random occasions when i open the car the drivers side window goes right down then when i shut the door it goes back up, very strange. Does anyone know the reason why this keeps happening??
A lot of convertibles do that. The Boxster is one example. The odd part is that they do it all the time. It allows the window to clear the top for a better seal.
The real question is, why does it stop happening? It's supposed to do that everytime you open either of the doors. The windows fit into a rubber seal, and they should drop to clear the seal anytime the door is opened.
My car (a '94 convertable) quit dropping the window (driver side only), and it turned out to be a microswitch that is built into the door latch assembly. I removed the door latch and cleaned a spring that activated the microswitch (the microswitch itself is okay, but the lilnkage sticks) and this fixed my problem.
You should also notice that when the window fails to drop, the interior light and key-in-the-ingnition chime also fail to come on. This is a sign that the car doesn't know the door has been opened -- which is precisely what the switch is supposed to tell it.
Well, DUH! If the windows are already raised less than the full amount, there is no purpose in lowering them. The windows ONLY need to be lowered if they are fully raised when the door is opened.
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