What's active steering?
My Audi is indeed a quattro. Again I've never brought it to the track, but on in the expressways, in the corners, slow, quick, etc... steering wise it actually feels alright, despite being an AWD car. From what I understand it Audi quattro systems throttle the drive from the front to the back progressively when they corner, to kill off understeer.
I have an S350 (albeit 9 years old) and the steering on the Audi feels a lot better than the S350. Maybe it's a personal preference thing, but somehow with the Merc the car feels like it's "floating." There's something that I can't place that really irks me about it. It's like there's a disconnect between the steering input and the car. The reaction time between the two is good, it feels happening at the same time, but it's a bit surreal - like, "am I really turning the car? It doesn't feel like I am." It feels like you're just coincidentally turning the steering wheel where the car is going at the right time. And this is cruising for a Sunday drive, not pushing in any way shape or form. I hope I haven't confused anyone!
Note: I don't, and probably won't ever again, own a BMW - that thing has caused me too much trauma in the past!