I've re-checked all of the fuses, including a couple under the steering column, and all are OK. Does anyone have any idea what else could be causing the windows, roof and mirrors to all not be working? Could they be disabled in the can-bus for whatever reason, or maybe a particular relay is faulty?
A while ago I enabled the beep when you lock the car with the keyfob. In its current state, sometimes the car beeps and sometimes it doesn't - I guess indicating the electrics have gone weird somewhere?!
Any help or suggestions at all would be greatly appreciated...not being able to open the windows is not fun

EDIT: Also, I scanned with VAG-COM and it didn't return any faults at all (not even previous ones that I hadn't cleared)...could this be linked or is it just because I disconnected the battery?
Thanks,
Will