Claude Lelouch mounting the camera on the Mercedes-Benz 450 SEL for the filming of C’était un rendez-vous, 1976.
Legend says that the driver was a F1 pilot, Jacques Laffite or Jacky Ickx, but Lelouch always insists that he was the driver.
See the clip here: http://www.youtube.com/watch?v=COyab3YQS48
Note that the sound has been dubbed with the sound of a Ferrari 275 GTB. I would rather have heard the sound of the Mercedes 6,9 V8 ;)