These are really nice all-in-one light fire+rescue+medic trucks. I read the history of them in the magazine "Vehicules d'Incendie". They're in their 5th generation design now; Paris has over 100 of them in service, I think.
The fifth generation looks pretty much the same. The main improvements have been to upgrade the pump from 1000 to 1500 LPM and to incorporate CAFS for both A and B class fires. At last count there were 115 of these in front line service, around 60% being fifth generation units.
Added by Michael Feldman on 14 November 2013.