t-sport
You can buy a ODB-11 (ODB2) cable from ebay for about £10
eBay.co.uk: VAG-COM KKL 409.1 COMPATIBLE OBD 2 II CABLE OBD2 O4 (item 230034203682 end time 05-Oct-06 00:04:09 BST)
and then you can download the shareware app from ROSH_TECH which has enough free fetures to keep you going for clearing codes etc and small changes like this.
I have got version 4.09 and a serial lead as i use it on my old old laptop (which i dont mind throwing around outside)
It well worth it, even for clearing error codes etc...
Please can some one confirm its the ODB-2 cable and the latest software verion???? i have had mind now for 2 years so forgoting extactly.. (t-sport have a read off ROSS-TECH site and you will find all the info you require)
Cheers
Rickt