the 3.0 diesels have a problem with swirl flap motors that are built into the inlet manifolds.
Expensive fix, it realy is best to have a fault scan to find out what the problem is....l
http://www.audi-sport.net/vb/vcds-formerly-vag-com-forum/84603-***vcds-users-map***.html
Link to thread
You can use he search box at the top of the page.
VCDS= diagnostic program.
Look for a Vagcom user location for a member in your area.
I am not an A6 owner, so not sure on the controls.
Heater settings on all 3 Audi's we have are stored on the key, do you have a spare to try ?
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