Thanks guys... I guess the S2 had to do for this in lack of the Leica SL! The M-B was part of some tour group, possibly a car club, indicated by the fender sticker. We are members of the Mercedes-Benz Club of America, and they do sponsor group driving tours, so this may have been part of that. Driver & Navigator names are on stickers on the upper doors. Also, it was raining lightly off and on, yet the 300SL owners left the top down!?!
Leica S2, 2.5/35mm Summarit-S