that is pretty sweet looking. one of these days i'll stop into a mercedes dealer and ask about the cup holder (i'll probably get some interesting looks :P). a friend of mine remembers a particular model that he saw it in (97 e320) so at least i can narrow down the search. wish there was an online ETK for merdedes like we have for bmw!
The Merc cupholder talked about can be seen on any CLK Merc (CLK 320, CLK 430, CLK 500, CLK 55, etc.), I am not sure if it's available on other models or not...