The only other person that has attempted to install it on this website is s4atlast! Unfortunately I don't know if the clock is still an issue. The way it sounded was as though the clock would work but sent an incorrect signal to the NAV unit forcing an error in the time on the Navigation system. The clock issue might not even be a problem on the North American model NAv since we dont use the radio clock that the europeans have broadcast. Then installation, once you have the correct adapters (kufatec and Ralf Deventor), is primarily plug and play (with exception of the vag-com settings). There are also issues between which versions you use. Depending on how much you read through this website, you should come to the conclusion you need the Nav unit for the A6 (primarily for the faceplate). Other issues are the color and size of the faceplate. Those modifications should be minor. Then there is the difficulty of modifying the discs for the european model. If you go with the North American model the discs can be bought through NAVTEC. Unofrtunately no one knows whether the NA edition will have most or all of the features the Eur model has such as T.V. but you will have the ability to have Sat radio. I have decided to buy the North American edition in a month or two and have successfully bought all of the wires, adapters, and antenna. If I can help with anymore information you need let me know. By the way, I forgot, I will be attempting the install on my 2001 S4.