Very original, elegant and timeless exterior styling, and at the same time it is generally more discreet than other higher profile German brands. Handling is consistent and reassuring - just like a 5-series BMW.
Serious build quality - fit and finish almost flawless. Great room and the cabin is beautifully designed and appointed - first class everywhere. Audi's leather has a particularly exquisite finish.
Excellent perceived value and general quality - you then get into a C- or E- class Mercedes and start nitpicking their quality problems!
Power delivery is creamy and seamless. However, 170 brake horse power and 230 Nm torque from 2.4 litre V6 engine seem to be not enough to motivate a car this heavy. Feels considerably less performing than my old Nissan Maxima V6.
An A6, any A6, is a rewarding car to drive and possess. However, if you prefer a quicker vehicle, I would recommend opting for a different A6 - the 3.0 or the 2.7T, particularly the latter.
When the moment comes to trade it in for a newer vehicle, I will be hard-pressed to find one as generally pleasing and satisfying as this one.