Dazboi (on here) is one of their chaps; I can not speak highly enough of him (he is at Maidenhead), sure you are about to get inundated with good reviews of that branch, go there its a no brainier :ILU:
arrr yes the witney boys could not even reprogramme the locking on my t5,when i was there thay cooked
a ecu on a crafter when doing a sortware update
so www.autowerkstatt.co.uk sorted it out for me at half the price.
If you want to know what's what and its a dealer you need then he's your man.
I still have a soft spot for the dealer near me who just went in for the keep replacing stuff and we'll see what happens - but it was all under warranty so I was happy enough.
When it gets to the point that you actually need to have something properly resolved then its Maidenhead for you. Just remember they're really good at finding other things that need attention at the same time.
there's always value in people not knowing what they're doing as long as the cards are stacked in your favour (ie there's a warranty). I am a little shocked at how much has had to be replaced on mine.