I test drove a 2002 A6 3.0 quattro 5A with 71,000 miles on Saturday, and liked it quite a bit. Inside and out, you wouldn't know its age or mileage. I am replacing a 2004 A4 1.8T Q 5M who's lease is ending in 2 weeks.
So I tried the Sport mode on the Tiptronic on the A6, and it seemed to hold the RPMs much higher (than "Drive" mode), even when cruising (not accelerating). I thought that the Sport mode is just supposed to shift quicker with higher RPMs while shifting, but then maintain a more efficient engine speed when not accelerating. This is how the "Power" mode on my wife's Camry works, and I thought the Audi would work similarly.
Is this the way it is supposed to be? Or could there be something wrong with the tranny, or does it take more time for it to upshift, or maybe I'm just not operating it correctly. Admittedly, I didn't try it for long, because it seemed it was just burning gas away at that RPM.