Anyone know when Audi introduced Ventilated seats on the A8?

[blitzed007]

Im in the market for an A8 circa 15k, but im struggling to find one with the ventilated seats and massage option, im not sure if this option was available after 2006?? even many S8s and W12s dont have this option (both of these out of my price range of course). The Bmw 7 series seem to have this option on many cars ive seen for sale even on the basic models, so why not the A8?