Hi i have a C220 Auto would have to say that i bought it as I was new I would be doing a lot of miles and looking for economy and something that would hold a price.
I did not want to take the hit on a new car, got it with 70 k on the clock full MBSH I have done 50, 000 miles in 9 months and in that time have had all the services required, fitted one new heater motor, and a set of glow plugs and pre heating solenoid and 4 tyres.
now that's not a lot for a car that has completed 5 years in mileage terms, MPG is averaging 530 miles per tank
I would agree with the other posts it is underpowered put hay you can get used to it (or have the system re-mapped) go on buy it...