IMDB entry
I watched the first part of this two-part mini-series tonight on ITV 1 in the UK (no captures, sorry, I don't have the wherewithal to capture from television broadcasts). It's a psychological thriller about a family on a camping holiday in France, who find themselves followed by a creepy couple in a big camper van.
Bon Voyage is a UK-Canada co-production that appears to be filmed mostly in Canada, with a small amount of location work in France. The caravans seen at the campsites are all either American RVs or Volkswagen T2s.
Anyway, the cars (the ones that could be spotted, anyway):
Mercedes (I don't know what model, but it's said in dialogue to be from 1973). This is the Aldred family's car and is worth five stars.
Ford F-350 (?) RV, belonging to the very sinister Simon and Linda Holder. Also five stars.
Citroen Type H, background at a service station to make it look more French.
Volkswagen Bus [Typ 2 / T1]. Three stars, because the Aldreds' daughter Rachel makes out with a hunky French boy in it.
Peugeot 807/Citroen C8, background at a campsite.
Dodge/Freightliner Sprinter RV (definitely not Mercedes-badged), background at a campsite.
Volvo 7xx (I think), briefly seen during a chase/overtaking scene. I think it had sealed-beam twin headlamps.
Ford RV similar to the Holders's one, appears briefly (it makes the Aldreds think they're being followed again).
There were also various background cars and RVs that weren't clear enough to identify. I also didn't note the cars in real French locations.