I've just had the auxilliary rad replaced on my RS2 having run it without one for quite some time. This was generally OK but occasionally when you got stuck in traffic it would get a tad warm and the fan would kick in. Generally speaking I only use the old girl when then roads are clear and give it a bit of juice and I guess there's plenty of cold air flowing through so the lack of an auxillary never really bothered me.
Anyway, I finally decided to get a new aux rad fitted recently to see how much this affected the operating temperature of the car. Not had time to test it properly yet as she now needs a new ignition barrel
So the question is what temperature does your generally sit at when given a bit of a poke? Mine generally sits around the 90 mark but hopefully the new rad may knock this down a touch.....