Could do better
I own a Mercedes ML270 on a 02 plate and have very few complaints about the performance. It handles the road well, never lacks in power and does an average of 34mpg.
However it did brake down due to the earth strap snapping in half. Since this is not a cheap vehicle and you'd expect a bit more reliability than that. Maybe I was just unlucky, I'd be interested to know if anyone else has had this problem.