Yes, the CD changer reference is correct in Audi speak. Of all things, the actual box the AMI unit comes in is a CD changer box, and that is Audi's part description on their warehouse inventory tracking sticker too.

I know from being the first known guy to self install this in a D3 and have it work right out of the box. Maybe the only D3'er so far, though others are hot on the trail too--there was one earlier C6 post (the one with a lot of pics) that got it in while my parts were on order. Several have posted they had the dealer do it.

For reference, inside the box that says and even pictures a "Genuine CD autochanger" (I'm reading off the box) is the AMI "brain" that fits into the second CD slot to the right of your existing unit--unless that is you have an early one without two drive bays in the glove box by chance. Thus, unlike me, you won't have the experience on seeing the box at first and saying, oh %^$#, they sent me the wrong d^$* part.

If you search the archives, you will find the details on this and the right parts numbers.

....

Current #1: '06 D3 A8L W12 brilliant black w/ amaretto & 4 seat setup, GmbH custom, CPO; modestly VAG COM lowered, H&R 20mm rear DRA's with 275/35 on OEM polished + forged 20's; S8 sway bars (see: rear bar and gen'l D3 bar info and front bar); tweaked 385mm front factory brake mod and matching rear brake mod; matching C6 A6 back headrests (better rear view: headrest tweak); owner installed AMI retrofit with part number details here; other VAG COM tweaking to suit
Current #2. C5 '00 A6 4.2 ming blue w/ beige, new off showroom floor; Lemiwinks + VAG COM tweaks; smoked tails; RS 6 OEM 18's; RNS-D (CD) Navi
Prior: '96 C4 A6 2.8Q, still w/ family; '85 C3 5000S 5 sp FWD, '73 C1 100LS

helpful cross reference to a C6 post with MMI and other TSB's that also cover D3 A8's.