Finally got round to fitting the Parrot kit to my Passat... but before I go and disconnect the power cable from the headunit I thought I'd check I had the code ... and I don't!

The local dealership want me to go into the car then pay £10 ... Firstly this is a bit out of the way and then I don't think I should pay a fee... My Dad got his Audi one done for free.

It's a Gamma unit as fitted to a 04 VW Passat ... the code is VWZAZ3D2315939.

Any help appreciated, the VW code reader ran once then won't run again!