well, fixed mine finally myself, wasnt to hard to do. i still have to find out the torque setting for the 6 bolts on the back diff, other than that its all back on, took for a short spin and all seems well

only took about an hour to get off and get back on, would have been interested to know what garage would have charged for the labour on the job ;-) that was with me under the car and no ramp, without the right tools, on a ramp and with right tools and knowing a bit about cars I am sure VW could swap out in about 20 mins. cost 800 euro for the shaft, all because a bit of rubber had perished, come on VW, sort this out, its a major part on a car and a part that SHOULD not fail! its dented my confidence in the car now, i do some long, long drives around europe, not sure i will trust the car now, maybe time for a merc gl instead.
if anyone would like pics etc of what happens i have them

can also let anyone who needs the info know how to swap out, its pretty simple.