I would keep insisting that the wheel/tyre combination is not suitable and that the wheel strength is not sufficient to withstand impacts unless protected by a sidewwall of approximately 100mm.
Would they warrant this wheel if a 225/35 tyre were fitted? I suspect not, but that is the size needed to give the same sidewall height as the 205/40 A2 tyre, which equates to 82mm.
Also ask why ALL other A2 wheels are unique to the A2, that is the 6-spoke SE wheel and the polished 15" version on the standard car. These are not found anywhere else in the entire VW/Audi range, so why is it that the 17" wheel from an A3 is fit to be used on the A2, when used with a smaller tyre?
Combine this with the crashingly harsh ride on the Sport model, and it all points to a hurridly developed car: "We need to spice up the range with a sporty version, but need it quick and with existing parts!"
You will need to keep on hassling them, but I got a satisfactory result in the end - keep on pushing.
Cheers,
Mike