i think i had already see it near to my home in november. German manufacturers seems to do a lot of test near to my home in the Mont Ventoux (a mountain). I had see a lot of cars before release with little camouflage or heavy camouflage: BMW X6, 1 Cabriolet, 7, Mercedes S Klasse, the new Panamera (a convoy of 4 or 5) in june 2016 without camouflage...

Rinspeed a écrit
I think they test on there fuel pump. I have a book about developement of Skoda Favorit and the main man who constructed it says there that lot of european brands test it there.

JFK a écrit

They test rather if the car is able to withstand the rise of Mont Ventoux (radiator that heats or not). Sometimes they have a trailer.