Bump! I'm looking for the same. I also have an Audi A4 and have the VAGCOM. For Euro cars, for instance, they can CLOSE the windows and sunroof via the remote. This has been disabled in the US. I want to turn it back on! (and see what else I can turn on, in the mean time).

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2004 Porsche 911 C4S X51, Seal Grey / Black
2006 Porsche Boxster S, Guards Red / Sand Beige
2008 BMW X5 4.8i, Black Sapphire / Saddle Brown
2001 Audi A4 1.8tq, Laser Red / Black, APR Stage 2, H&R Coilovers
2002 Suzuki GSX600 Katana, Yellow