After using the Voice Control on A8, I want to use it on my 08 Q7, but it’s “INACTIVE BUTTON”. I don’t have navigation on my Q7, but I have bluetooth. The manufacturer DISABLED the voice control module. Now I can ENABLE it using VCDS (VAG-COM). If the voice and command button don’t work, revert it back to 100900 and do soft MMI restart – Setup+Big Round Button+ Upper right MMI selector.