No, unfortunately a lot more to do to enable electrically folding mirrors than just replacing a switch, my S4 does not have electrically folding either nor does my wife's new Polo - but older daughter's late 2009 Ibiza does have.
Yes, I too got previous owner's banking/credit card details, people are just lazy, I separate these tabs out every time, I don't know what the obsession is that makes some traders staple that tab with confidential details to bills! Alcantara is handy, I've had that on cars since 2000.
Still weird about that panel being fitted, I'm sure Audi does not fit more expensive panels at factory for a laugh. Generally speaking, if a car is not a factory order, then I think that the production planners have a bowl of options just like a lucky dip - and select a few at random for that car being loaded into the production plan - very special and very Audi!
Edit:- VW when faced with a similar situation tend to use contents of previous factory order options, and SEAT, well they go for what their potential owners want, like electrical folding mirrors and bigger alloy wheels - especially on the cheaper models, how strange!