Oh, I'd like to step in for this 'rear visibility' subject.
Not to put you off in any way, but IMHO you have to know that 'in general' the visibility, in any direction in an A2 is quite poor, compared to a 'regular' car.
The rear window is quite narrow and distorts your rear-mirror view, because of it's shape. I also find it hard to judge where 'low' objects are while manoeuvering backwards.
The side view is also not too good. I find that the b-pillars are not in the best position for a quick peek over the shoulder.
The front view is the most discussed topics. The size and shape of the a-pillars cause a loss of visibility when cornering and entering roundabouts.
But, but, but.....!
This is not all bad!
Lots of cars are hard to drive when going backwards. The A2 is no exception. And the distortion in the mirror is very easy to get used too. The spoiler and lower quarter are not a problem either. Nor is the lack of a wiper
For better side visibility I just drive more 'pro-active', perhaps using my mirrors more often.
And for the best front visibility you just move you head a bit. Sideways, to to front, whatever it takes to fill in the blind spot.
I take it all for granted, just because the A2 is so nice in many other ways.
BTW: I did once almost run over a pedestrian that appeared 'out of nowhere' while I was passing a crossing. I even hit here heel with my bumper. Very freightening experience. Ever since I am very weary of pedestrian crossings. And on review of the situation, I can only conclude that the girl must have been running (in the dark too), to catch her train. And that she purposely ran between cars, possibly even from behind me. No amount of unrestricted front visibility could have helped me.
Hope that helps.
Okay. A small comment on ride comfort. I have the stock suspension, but with the 16" rims and 185/50 tires. The ride is somewhat firm, but without being sloppy. The Golf V that I'm currently temporarily driving passes less bumps and long rolls to the driver and is less 'wiggly' than the A2, but I still prefer my own car.
I think an A2 on any 15" wheels would pass on even less of the road bumps than mine. Even better, in your case.
Just my 2 cents!
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(2003 Silver 1.4 Tdi Exclusive(SE), black interior, sport seats, heated mirrors, JVC KD-SH909RB cd-receiver, Infinity Kappa 63.1 + Vifa on-dash tweeters, 12" Subwoofer on 300w Amp) and on its merry way to Germany, ABT, to be chiptuned, finally!