So 2 years in this week and I've done 12k miles. The DIS reports 360 hours driving time at an average over 12k of 36mph.
Fuel economy is 26.9mpg. The coolant system has been checked 3 times with no fault found and the level does now seem stable, but hey I said that last year too.
Still enjoying the S-Tronic gearbox but keeping an eye on all the threads about this. I have 2 years of warranty left so will take a view at the end of that as to what to do. As my car is 99.9% for commuting it's been a life saver or more precisely a left leg saver! You can see how good my journey is by the average speed quoted above.
After 2 years I finally feel I know how to use the S-Tronic. I frequently switch between D and S depending on what's happening.
Drive Select I just leave in Dynamic and switch between D/S as needed. I don't have adaptive dampers so the setting has no ill effect on the ride and I prefer the crisper throttle response.
The CQuartz Finest coating is still working so has made the claimed 2 year life. I have some random scratches on the rear bumper that I can't really work out what has caused them. No doubt general work's car park wear and tear. I've tried photographing them but they don't come out and it's only really my Detailer's eye that sees them. Most people would never notice.
I still don't see many S4s about and all the ones I have seen round here are Avants so I seem to be a rare sight on the roads! I still think the S4 is a great all rounder and perfectly fits the bill of Dad taxi as well as being fun to hoon around in should the fancy take me.