The units are exactly the same as the seat ones except that you will get the vw loading screen, something which you cannot change.
I believe that your blurtooth and steering wheel controls will work fine, it's only when you try and buy another brand like me that you have problems.
 
Cheers for your replys another question would this model no. work
1t0 o35194d says its for a Touareg
 
I believe I read it on some French Forum but also if you so an mfd search on ebay, all the older cd version say "Skoda, Seat VW,etc..." but all the DVD versions say VW, I'd be happy if you could proove me wrong though... well not really as they don't make a seat logo version :(
 
as far as I know it should fit fine.. I read VWnavi.com and nothing says otherwise. I beleive a few people on there have installed it.