Would this one work on a Golf MKV?

[iampivot]

It's an OBD-II Hardware Interface for the iphone, working wireless over bluetooth.

CarTrip will connect your iOS device and your automobile

Griffin Technology: CarTrip - OBD-II Hardware Interface

[Nathan_B]

Please let us know if you get it!

[Idle]

If I remember correctly. OBD-II readers are just that — readers. If it does work with the Mk V, I doubt you'll be able to change/reset anything with it as you can with the RossTech devices.

Further, OBD-II was originally mandated to connect to the ECU for environmental reasons, so I feel it's unlikely this thing will talk to the multitude of other devices on a VW.

As the man says "tread your own path."