Engine fitted is probably 1.9 tdi 115ps PD oil must be to vw 505.01 spec nothing else will do (others may/may not stop damage to injectors) this means Ford Formula SD oil or Quantum PD or Millers XFE pd may be others but they must say 505.01 (not 505.02 or 505.00) Ignore a dealer that says otherwise, oh annd by the way did I mention the 505.01 spec vag-com is a bit of software with hardware interface (OBD2 Spec) which communicates with the modules in the car, an unregistered version can read faults and setting and limitted resettings (will be corrected here) a registered version (costing an extra