Having perused this recently, the only worry I could see is if you had a first gen VAG FSI engine. When I had an Audi TFSI I was only using Momentum99 anyway, so perhaps they're meant to use 98 Ron regardless.
I've just bought a 1.7 on an X plate for my girlfriend's runabout. This thread has been helpful in clearing up my questions about its spec and build. I have Pacific Green, with the Lux Pack and blue badge on the steering wheel.
My leather rear seats are branded Recaro, but the leather fronts...