My $6 Vgate Bluetooth obd II dongle works a dream
(tdi golf, my05 sti & monaro)
as per
Review of Bluetooth OBD2 Wireless Transceiver Diagnostic Dongle - Check Engine Light - YouTube
(long & boring but you get the idea)
Haven't had much time to play with yet, but suprised by the little golf's big numbers, can't wait to try it on the new bi