I happened to see "The World, The Flesh" with Harry Belafonte (1959) yesterday on Turner, and I was struck by the number of Chrysler Corporation vehicles in the New York sequences.
There's a memorable scene where Harry gets to drive a 300 convertible out of a showroom window. There's a De Soto coupe. There's Plymouth taxis and a Dodge pickup.
Also, there's some "abandoned freeway" scenes where there's hundreds of mixed makes, fifties and forties cars, in long static shots.
I'm surprised that this MGM movie doesn't appear as a Chrysler search in your IMCDb.
Here's some cars in the second minute of this Youtube trailer:
http://www.youtube.com/watch?v=SDRAAt8q2zk
The massed cars on the bridge are at 1:15-17 on this trailer:
http://www.youtube.com/watch?v=zxrmTHF08AM
Oh! Here's the whole movie on Youtube. The showroom Chrysler 300 scene is at 0:13:00 or so.
http://www.youtube.com/watch?v=0SSdCJCC84c