I received my new A4 with a defective right rear window. The glass is out of control, when you operate the window down, it goes half way down and then reverses automatically and closes again. Or it chatters and oscillates. The dealer has now installed the third motor, maybe they should have realized by now its not the motor. The new motor(again) does the same thing.<p>You can also hear the relay/motor chattering on its own when you are driving.<p>Any help, idea what the problem is? The dealer/techs are at a loss?

Tony,<p>Does the window operate erraticly when you use the switch on the rear door or just when you operate it from the driver's door? Could be a problem with the switch at the drivers door. If the problem exist when using either switches, it sounds like a loose connection between the switches and the motor. <p>HTH,<br>Bert