weird window behaviour...

[dmo]

noticed a strange problem with the windows in my z4c. when I close the left window and then close the right window a second later (whilst the left one is still closing), when the left one has finished closing the right one goes down a bit (like 5cm.. not the little drop that you normally get to allow the window to create a watertight seal when the door is closed). the right one doesn't fully close.. it just started going down around the time the left one closes. I them have to repress the button for the right window to close. it's annoying.. only started recently. anyone seen this before?

 

[RichIbizaSport]

I would try resetting the window positions. I can't remember the exact procedure, but it's along the lines of:

send the window all the way to the bottom and keep the button pressed for 10 seconds, then bring it all the way to the top and keep pressed for 10 seconds.

 

[RichIbizaSport]

I was close:
http://www.z4-forum.com/forum/viewtopic.php?t=196

 

[bcworkz]

Several have noticed odd behaviour whilst closing both windows at the same time. One suggested theory is the current draw of both motors causes a voltage drop which somehow triggers the anti-entrapment safety mechanism, causing one window or the other reverse.