I am from Australia and I just installed these tyres on my friend's mercedes benz.
I simply could not believe how good they are.
Firstly, they are the smoothest tyre I have ever felt. They take the bumps so well and give such a luxurious feel while being so ---- quiet. For the first time ever I could actually hear the engine over the road noise.
Steering responsiveness is as good as it will ever be for a Mercedes and cannot expect too much seeing as though its boat like in it's handling. Steering is lighter and sharper though, while turning in has improved.
Wet performance is also exemplary.
The only negative is that on the grip limit is a little soft and the tyre doesn't have the precision of the Michelin Pilot supersport but it's not far off.
These continentals are far better than the michelins for an everyday tyre.
They grip about 10-15% less overall and are slightly less responsive but make up for that with the best ride ever.
These ride better than a purpose built luxury tyre that was on there before.