On my 2005 A6, the most troublesome parts are the sun visors! Eventually they develop a lot of friction and don't move freely. Once that happens, they sag when stowed--in other words, they won't stay flat up against the headliner. This happened first with the passenger side and is now happening with the driver's side. Have other folks had this problem? Is there a way of lubricating them to cure this problem, or at least to prevent it after a replacement is installed?

2005 A6 Quattro
3.2
Silver with Amaretto interior

 

i'm having this problem too. hoping there is an easy fix...