Vw offer 3 different services,
1. is simple check, oil and filer change,
2 is errors check, oil and filter and fuel filter and genral car check over
3 is full check, error check, oil and all filter change and spark plugs, good full car check over, and they even hoovered and washed my car aswell
along these lines and thats just what i remember them telling me but correct me if im wrong.