It will not be a prototype they get crushed, what I suspect is the case is that it was one of a few that were the 1st ones in and they were used for road tests, mag features and uk type approval tests.
The same thing happened with the Skoda Octavia vRS all the press cars were Y plate yet they were not sold until the 51 plate.
I have 2 Autocar road tests from early 1997 and they are on R plates.
It will have some value being an early press car but in real terms is is just a mk4 at the end of the day, if you get the chassis number VW should be able to tell you when it was built, doubt it will be the 1st of the line as they would have produced LHD cars first then switched to RHD.
Welcome to the site btw
