Hi All,
my mate runs an 18 reg c63s saloon which I drove for a couple weeks while he was away on holidays and it is such an epic car. The acceleration in the dry is epic! In the wet my A45 will leave him for dead for sure! The sound is also amazing! No need for aftermarket exhaust. The interior is the same as my A45 which is no bad thing, seats are very supportive and although I'm not a fan of the mounted screen you quickly get used to it, plus the graphics is better than on the new Lexus RX450H in my opinion (loan car while my F was getting some new pads). Of course, the car is new(ish) therefore not enough wear and tear to cause any issues as yet, however he hasn't had any issues to date. Based on my own experience, it is likely that a Lexus will be more reliable than a merc, however if you like a car then arm yourself with a comprehensive warranty then dive right it and enjoy the experience!
D