100/A6 VIN problem....

Ha, just realised that I posted this on the wrong club - I've got a 1993 100 2.8 made for the American market which is badged up as an A6....

Hi,

I'm a complete newbie to this forum. I have a house in France and some
years ago bought a left hand drive A6 in the UK at, what I thought was
the right price. I've had it re-registered in France and have the
official carte gris (the French equivalent of a V5) On applying for a
two year Controle Technique (French MOT) I now find that the VIN number
which the French authorities know the car by (is on carte gris) - shown
on the base of windscreen, door pillar and boot sticker, is not the same
as the VIN number stamped on the bulkhead. I have been told that i must
now get the engine bay stamped with the number shown in the three
places mentioned above. Has anyone had any similar experiences? Can I
check anywhere for the two VIN numbers to check I've not got a 'cut
& shut'. This is very annoying since I've been running this car (a
1993 model) for the last 10 years. French legislation has recently been
tightened up.....