The Cadillac ambulance is a 1957 model.

http://www.imdb.com/title/tt0056775/

So far only the first entire season has been released, along with individual episodes from the other two seasons. That's where I got these images.

The closing credits include a mandatory courtesy for Chrysler, but there are a lot of Fords in the first season.


ep. 1.1

Triumph (TR4A?), three stars (one of the main characters, Tim O'Hara, drives this throughout the first two thirds of the first season)


1961 Plymouth (?), two stars


1.2

1963 Mercury, two stars


1.6

1963 Ford Falcon wagon, two stars


1964 Plymouth (Savoy?) (police car on the left), two stars
1963 Ford Galaxie (police car on the right), two stars


(alternate shots of the Galaxie from another two star appearance in ep. 1.13)


1.9

1946 Ford truck, two stars


unknown vehicle, two stars


unknown crane, one star


unknown crane, one star


1.13

1963 Ford Falcon, three stars (one of the few times we actually see Uncle Martin driving a car)


1.16

1957 Cadillac ambulance, two stars


1.24

1964 Plymouth Fury, three stars (This is Tim's new ride, replacing the Triumph)


1956 Chevrolet, one star


1.25

1964 Dodge Dart, two stars


...one more shot just to show it's a 4 door


1.27

Ford Econoline, two stars


1.28

1957 Chevrolet (6700 series?), two stars


1.31

1964 Ford Custom (taxi), two stars


1.32

1964 Dodge Dart convertible, two stars


3.11

1965 Plymouth Fury (Fury 3?) convertible, three stars (Tim's later car)


just a guess...1966 Chrysler Town and Country? Two stars


3.28

unknown moped, two stars