Its a play off fahrvergnügen which was used for VW commercials back in the day. It means driving pleasure but shortly after all kinds of plays came from that is is one of them
Which, of course, was debuted with the VW Corrado...which, of course, was also the car that introduced the VR6 engine which won many design awards.
There was a great spoof sticker some people were sporting years ago that said "F*kengruven" (with a 'u' instead of the star, and an umlaut over the second 'u') and a different figure than someone driving.