It depends more on the way the company uses it. For example the new MINI is also all uppercase, and the smart is all lowercase.
Simca and Fiat were not always written uppercase in commercial documents.

About Fiat 238 Ambulanza, don't they have a raised roof that differenciate them from the regular vans? Or were there also vans with such roof?
I didn't see any from a quick search, except this one which could be some custom job or a modified ambulance:
https://www.imcdb.org/vehicle_204387-Fiat-238-1967.html

Yes, there were normal vans with raised roof and ambulances without raised roof, as they were built by various coachbuilders
Examples:
https://www.autobelle.it/altre-immagini/immagini_annunci/7/75885/lista_75885.d1523612864.jpg
https://live.staticflickr.com/4191/34312647910_de7b4e8177_b.jpg
https://live.staticflickr.com/7805/46646126231_a831bb7a2c_b.jpg

I think the one you linked could be a custom camper

Anyway I agree with you about the use in official documents. I'm not sure if Seat always has used the all uppercase version?

OK, I'll update the ambulances then


That's then something to confirm or reject

antp can you please update all of the 1997 Ford Puma to 1998? The model was introduced late in the year in 1997. Production did not even being until September of 1997.

https://imcdb.org/vehicles.php?make=Ford&model=Puma&page=1
https://en.wikipedia.org/wiki/Ford_Puma_(coup%C3%A9)

Updated