I’ve got a 4 bike version of this for an Audi and a 2 bike version for a Mini Countryman:
http://www.roofbox.co.uk/scripts/rbvehsel4_tab.php/car-specific-accessories/atera_strada_dl_2_to_3_bike_carrier_uk_lights_no_ar2602/Qx%40w%2C6M42VAwp3%40Rb%7B~cC4ure5K%7BWW
Atera actually make the VW, Audi, BMW & Mini bike carriers you can buy from the car companies direct but obviously re badged for an infalted price (Not that relevant but the bike carrier for the Mini Countryman fits in the bumper, have a look on the Mini web site it’s exactly the same as the Atera one but with a special frame underneath it).
The nice thing about these is that they tilt down so you don’t have to take the bikes off to get in the boot etc.
Atera also make the roof bars and the bike carriers that slot on to them for the same car companies. I bought some Atera roof bars and bike carriers for the Audi and when we bought the Countryman the bike carriers slot straight onto the Mini roof bars I asked them to throw in.
Make sure you get a Westfalia tow bar (they do a detachable version). They also make the factory fitted tow bars for VW & Audi. Again I had one fitted to the Audi and it’s that compatible that it all fits in the polystyrene cut out with the jack etc !