Same boot went on me at 4 years, 2 months and 57k miles.
I got my local VW dealer to do it (its the only thing they've actually paid for under VW used warranty cover) and they still managed to cock it up.
I saw grease running down my wheel a few weeks later and drove it back, they told me it was fine. A month later at the MOT, they noticed the idiots hadn't crimped the clip on the large end!
Now my car never goes to VW and I get a good VW specialist to do my work.
Good luck!