the "white" mkII you saw was actually a brand spanking new Light Blue Sapphire P-type w/ sunroof...I could prolly tell what tranny if I could get a closer look through the sunroof.
However, there is a white mkII in "The Fast and the Furious"
pic:
There is a black mkII in "Head of State" where everyone is running out of their houses, you can see it in a driveway, on the right hand side of the screen.
Also, Back to the Future; a brand new 1985 P-type, same light blue
here's a pic:
Inspector Gadget:
Lots of other movies too, but I don't have pics
