W204 C180 Executive SE 2013 Automatic / COMAND NTG4.7 and Morel speakers fitted by www.comand.co.uk
I would try to get a galvanised 2003 car, or better still a (much improved) face-lifted 2004 - possibly lowering the engine spec (e.g. 200CDI or the super-cheap 180K) to compensate for the higher cost.
Valeo radiator, MAFF, rust particularly around wheel arches and door bottoms. The C270 has plenty of grunt but gives decent MPG - I regularly see 45+ from my 2001 W203 estate. Personally, I think Elegance has enough toys but Avantgarde has too many potentially expensive to repair electric toys - steering wheel adjust, seat stuff etc.
We've had ours 2 1/2 years now and are really happy with it.