We looked into this with the Audi dealer in depth (!) as my wife has had folding mirrors for years - and was intent on getting them on her new A1 - and the only way they work is by turning the mirror knob round to the 'fold' position - with the engine on. They can't be set to fold/unfold on locking or unlocking, and need the power on ....
Hope this helps....
(unless of course, the VCDS wizards have an answer that differs?!)
