Good Afternoon,
My GTI has just come back from it's fourth visit to try and resolve this problem.
The "Master Technician" has now rectified the fault by manually entering the figures for the days and miles, and this seems to have cured the fault.
I don't know why this could not have been done from the out set though.
Anyway problem now solved. I hope this helps anyone else who comes across this fault with their car.
Thanks for looking in.
Best Regards
Keith.
Good to hear its finally been sorted!