I agree that I would definitely love to have the G500. Probably the only new Benz that I would buy without a doubt.

After that..
300SEL 6.3
W116 6.9
R107
R129 SL600 - gotta have a V-12
500E
560SEL W126
misc. W123's...

Oh well if I have to list it it'd be endless. However since summer is fast approaching, the one that I definitely would love to have is a mint R107 with working A/C.