Car Bike Rack

[S70JPS]

I'm looking for a bike rack to fit a 2005 Audi A3 5 door. I don't want to lay out loads of money. Can anyone point me in the direction of a rear mounted product? I went to Halfords this morning and they told me none of theirs were suitable. Having web searched them I'm not sure what to buy. Any help much appreciated. A 4 bike rack would be ideal but they all seem to hold 3.

[SoliD]

Saris rack of some sort are the ones usually recommended, not sure if you can get one for an A3?

[ukbabz]

I've got a Thule Bacpack on my Audi A3 (2003). fits really well. not too sure if it'll fit the 2005 model but looking at the two I can't see a huge difference.