In the opening credits, it says the movie without speeding up or "trucage" which is best translated as manipulation.
However, internet research reveals, the movie was shot with a fixed automatic camera on the bumper of a heavy but very fast Mercedes S-class (the hard ride of a genuine sports car would have ruined the equipment).
So as a matter of fact, the legend about Ferrari plus racing driver, the engine noise and the gear change sounds are all fake - and pretty much "trucage", indeed.
Nevertheless, the drive is hilarious to watch. Until recently, there was a synchronized show of the movie and a drawing of the route on a map on the Internet - unfortunately, this didn't work the last times I tried to watch.
