I'm pretty sure that both Ride 14 and the screen shot I posted are the 1940 model. The grille is different on the '41.
But aside from that, I have been looking at Robert Montgomery's films (Character 1), and I agree with Carnut that only Lady in the Lake (1947) seems a likely candidate for this puzzle.
It's an odd film - it's shot entirely from Philip Marlowe's perspective. The camera (and therefore the viewer) sees what Marlowe is seeing, and Robert Montgomery (who also directed) only appears when Marlowe is looking at his own reflection, in a mirror or whatever.
This also means that there are no long shots of Marlowe and his car. But there are a few glimpses, a couple shown below. I think there are enough details to tentatively identify it as a 1941 Ford Super Deluxe, so I think that Carnut could be right, and the link is with Ride 15.