Service prices do seem to vary wildly - mainly due to where you live.
All the details about services are in the service schedule book.
for t&d servicing you have an oil change (lubrication service) at 10K/12months (~£90) and then an interval service at 20K/24months (~£180) and a bigger inspection service at 40K. All within warranty requirements. The £90 includes long life (504) oil which isn't required for t&d servicing - so would be cheaper with the 'regular' (502) oil - and you'd still satisfy the warranty requirements. Basically you don't have a 'fixed' lubrication service when on long life.
Note that there is an "interval service" and an "interval service
inspection". The two being different.
For the extra ~£90 (lubrication vs. interval service) they plug the car in, look at the battery and kick the tyres!
There are also extra bits (brake fluid, dsg oil, spark plugs etc) at varying miles/times.
I think the general consensus is use t&d servicing with a Gti, but with the addition of long life oil as it's more suited to the high turbo temps.
Long life is more suited to diesels sat on a motorway all day, but that's not to say you wont be fully within warranty requirements if you stick to LL servicing.
Phew
