Read the manual

Wind window down, then back up and hold the switch for a few seconds. Job's a good 'un.

Some of the instructions on here are overkill.

 

Wow - I managed to do this by accident

The battery went a bit flat while scapping the crap off the paintwork at the weekend (too flat to start ). After a charge-up the auto windows weren't working (of course). NO INFO IN THE MANUAL!!!!!!!

Anyway it's working now so I guess Baps right - it has to be simple to fix by accident.

 

Am sure I read it in mine. Will check when I get home.