sopas-- How did you know I have a thing for Mercurys (may the brand rest in peace)? There are no less than three in your shot--2 '57s (the car closest to camera, and the Turnpike Cruiser in the middle of the shot, in the far lane) and a '46 (dark car at left). The other vehicles are a '55 Dodge (second from front) and a '58 Chevy.
http://www.edsel.net/dealer/MEL.html
Google Street View
Apparently there is still a Lincoln-Mercury dealer at 4437 Lankershim Blvd--well, a
Lincoln dealer, anyway (love the name). It may or may not be the same building--
could be, since the shape and the door and window spaces match--perhaps it's
just been modernized. Chucking the neon was not a good move, however. I'm sure
if it had been retained, Mayberry L-M would have sold hundreds of thousands
more Mercs, thereby saving the brand....