Hi guys im new to the forum and need some advice. i have test drove a E90320d with 139k on the clock 2006 model, the car is in an immaculate condition ,the only thing that i was concern about was the noise on the tyres, anyone with some advice.im driving a E46 and there is quite a dif in the ride, and how will the fuel economy be compare to thye E46 320 petrol?:=):