6n2 window won't open

my passenger side window won't open, think the motor is at fault which seems a rarity as normally it's reg clips, but when either switches are pressed you can hear the motor click so I'm assuming it has power, I read on the lupo forums this is to do with teeth on the motor not engaging correctly

I've got a new motor from a 5 door, assuming it's a straight swap into my 3 door,

just wondered if anyone has any ideas on how to get the window down far enough to get at the clamps holding the glass?

Edited 27 April, 201511 yr by Liam6n2