There are so Mb Star C4 many "favorites" that this is impossible to answer simply; here are mine: 356 speedster, 356 C coupe, 993 (air-cooled) 911 coupe, 1997 911 Turbo S coupe (993), 2005 911 Turbo S coupe (996 - mine is pictured), 2009 GT-2 (997 with 3.6 litre, 530 HP engine), and probably the 2010 911 Turbos and GT-3s (you'll begin seeing them soon).

Of course, there are Mb Star Connect C4 variations on many of these cars. And I've not reached too far back in time or into motor-sports only models.