For the benefit of future searchers:
W203 C, W209 CLK pre-Facelift COMAND and Audio Part numbers
"The post facelift system can not be reasonably fitted to the pre-facelift car - many other control units in the car need updating to make this work, and its almost certainly cheaper to just buy a post facelift car !"
Of course this was not an option as I bought a C-coupe and there were only a few imported that were 2005 models. Oh well!
