30 miles should be long enough to make sure the engine's up to temperature. DPF should be fine on that mileage. Just be sure to give it a quick bootful of throttle occasionally. I've never actually been in an E220 cdi but the C220 was fairly refined, especially at higher speeds. Around town it was ok as well but all 4 cylinder diesels are a bit agricultural at idle or low speed.
Thanks for that i had a bmw 520d 2008 had nothing but trouble with the dpf so i changed to a c180 61 reg but it sounds rough just want a quiet relieable car
Quiet enough.
People comment on not wanting a diesel in an open top car. But, overriding noise is wind & tyres (on all but perfect surfaces).
A few days ago I followed a porsche carrera 4 at speed. Couldn't hear the 250CDi over the noise of the porsche