Several interesting cars in this classic French comedy. In fact, the first 10 minutes or so Is simply scenes of a very unusual vehicle being driven to the French seaside for holiday. There’s a beautiful Mercedes later on in the film. I would thought this would have made your database previously. Interestingly, after watching this, my wife pointed out that this may be why the French loved Jerry Lewis so much. Similar physical comedy style. In fact, inspector Clouseau seems to have learned from Monsieur Hulot.

The Mercedes showe up in spoof of the “Citizen Kane” picnic motorcade .

indeed it is in the database: https://www.imcdb.org/movie_46487-Les-vacances-de-M-Hulot.html
If you did not find it maybe it is because you searched it with a ’ instead of a ' (both characters are close)
In such case searching with just one word (e.g. Hulot) may be safer.