When did XDrive and Valvetronic become standard?

[Boston X5 4.4]

My X5 is an '04 model (confirmed by the vin number). The '04 model year is the first year with XDrive and Valvetronic engine mgt system. Sometimes changes/improvements occur over the entire model year and are not all available at the start of the model year. As my '04 X5 has a build date of 12/03 is there any way to tell if it has all the '04 improvements - especially xdrive and valvetronic.
It has 6 speed tiptronic transmission, if that helps - I think earlier years were 5.

(probably a stupid question.....apologies for ignorance)

[B&DCalgary]

Have you tried talking to your dealer? Whever I have a question such as that, they simply type the VIN number into the computer and it tells them exactly what the standard configuration and options were on the vehicle.

[haigha]

All MYO4s have Valvetronic and X-drive. Mine is a 10/03.

[Boston X5 4.4]

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