Thanks very much for the info. Some of it was even useful.
Its not critical that i put 17" tyres on the car (i bought it for my mother). I just don't like the feel of the 14" tyres. I'd be happy with a 15 or 16" tyre.
I just wanted to know what it would result in - what is the highest tyre size, width i can use safely, without damaging the vehicle. Also with regard to the warranty. I was told, if i change the tyres it would null the warranty on the suspension.
However, another dealer told me i could put any tyre i choose (15", 16", 17") and the warranty would still hold... As long as the rim was a VW product.
This doesn't seem likely, however i will keep you guys posted.