A6 MMI Options

Phatbox is not compatible at all. It uses the CD changer interface which doesn't exist in the A6 MMI. You can add either another 6 CD changer with MP3 capability or a Dension gateway 500 and an Ipod or memory stick.

You can fit your parrot as there is a mute pin on the back of the CD/Radio unit. Not a 100% certain if there is a TEL+/TEL- connection for the speaker at all, I would have to check.

Yes you can as the MMI uses a daisy chain of fiber optic devices, the spec allows 4 media devices, although Audi only use 2 if them currenty on MMI 2G, so the CD/Radio is one device and the 6 CD is another. It will appear as 7 CD's in the MMI.

But adding the 6 CD is not as simple as it appears, when installing a new CD changer it will go into antitheft mode, known as Component Protection, this will cuase the CD changer to skip every 2 secs. This has to be cleared by a dealer online to germany.

Secondly, if you add a 6 CD with MP3 capability, your MMI has to be upto date enough to support the new CD capabilites.

6 CD changers are as follows

4E0 035 111 x non MP3 capable
4E0 035 110 x MP3/CD capable device

Won't the A6 will take an RNS-E and then you can keep the Glovebox CD and then you'll have SatNav PLUS the 8Gb of MP3's via the two SD card slots?

No, were talking new shape A6 from 2005 onwards, no RNS-E, only MMI with MOST.