I currently own a 2002 Mercedes ML 270cdi 197,000 miles on the clock. Love this car but now starting to look at what to go for next. Fuel and Tax are of interest. but do not think I can get away from the £490 tax so what is the fuel mpg like for the 320 cdi keep seeing on Autotrader 35 -39mpg extra urban but feel I may be falling into the trap that Autotrader only use latest figures and not real figures for the age of car. Any one out there own one and can give me some more detailed MPG for the 320 cdi, 350 cdi or 280cdi. Many thanks Paul