There's only one Aero in the picture (1960), the green circled one plus 3 Brazilian built Aeros also circled in green. Plus a 51 Chevy (can't ID what's behind it at top of pic), '46-48 Chevy, 13 VW beetles and 2 microbuses, 3 (maybe 4) DKW's (2 are wagons), 4 maybe 5 Renault Dauphines, '57 Ford, '58 Chevy stakebed truck, maybe a Volvo PV544, maybe a 1950's Opel (Kapitan?) behind the Willys and a 1960-1964 Corvair coupe. Not sure what that pre-war looking car is with the roofrack a few cars back of the bus at the bottom.