hy, first of all, congratulation for this website.
I would add my contribution with this very rare vehicle (only one in your db and only two in the films i know)
this is a car from french movie 'i comme icare' :
http://imdb.com/title/tt0079322/
the car is :
make : Citroen
model : CX Ambulance Tissier
here's some pictures :
http://guerard.com.fr/movie/ici_1.jpg
http://guerard.com.fr/movie/ici_2.jpg
http://guerard.com.fr/movie/ici_3.jpg
http://guerard.com.fr/movie/ici_4.jpg

Bye

Thanks!

It's added:

http://www.imcdb.org/movie_79322-I-comme-Icare.html