How to remove side air vents in 2006 Audi A4 and replace

SOURCE: Core Support and Radiator Replacement , Audi A4 Quatro 1.8

Very easy - the car is designed to have these parts as being removable for the timing belt service. Opening the car is called the "service position" and involves taking these parts nearly off the car. Use the link below (it's a link to a DIY procedure for doing the timing belt on the car) - it'll show you what to do in order to remove the front clip of the car and remove the core support and radiator.

http://www.audiworld.com/tech/eng35.shtml

SOURCE: electrical fault Audi A4 2002

PRISE OUT THE TRIM PANEL AT THE BASE OF THE ARMREST WITH A FLAT-BLADED TOOL UNDO 2 SCREWS(DRIVERS DOOR) SINGLE SCREW ACCESSIBLE THOUGH THE ARMREST ON PASSENGER SIDE ,NOW GO TO THE BASE OF THE DOOR TRIM UNDO THE SCREW IN THE CENTRE,ONTO THE TOP TRIM NOW ABOVE THE RELEASE HANDLE,STARTING AT THE FRONT EDGE(DOOR HINGE SIDE) CAREFULLY PULL THE TRIM PANEL AWAY FROM THE DOOR TO RELEASE THE CLIPS,THEN SLIDE IT TO THE FRONT TO UNHOOK THE REAR EDGE OF THE TRIM PANEL,UNDO THE 4 SCREWS YOU CAN SEE,UNHOOK CABLE FROM REAR OF INTERIOR DOOR HANDLE,DISCONNECT WIRING PLUGS SPEAKER ,WINDOW MOTOR CONTROL UNIT AND THERE YOU HAVE IT ..EASY... IF YOU START NOW YOU WILL HAVE IT FINISHED IN 2 DAYS...ONLY JOKING....SHOULD TAKE 1 HOUR..HOPE THIS WILL BE OF SOME HELP TO YOU...LET ME KNOW HOW YOU GOT ON

SOURCE: Front screen demister on Audi Avant A4 2004

ONE OF THE HEATER DISTRIBUTION FLAP MOTORS FAULTY.UNSCREW GLOVEBOX AND YOU WILL SEE THE ONE THANS NOT WORKING(TURN ON BLOWERS TO TEST)

SOURCE: Audi A4

Not sure if they've changed it but this is what i do for my 99 a4

First remove the screw in the handle pull, it should be next to where your fingers go.
Pull down on the black piece of plastic and remove the screw form the door
Then remove the screws on either end of the door, one near the door jam on top and one near the other side, same place.
Finally pull up then out and the door panel should come out

Hope that helps

SOURCE: Audi A4 need to replace rear brake light on audi a4

Inside the boot is a plastic cap embeded in the boot liner. Remove the cap to reveal a screw. Undo the screw and the whole rear light cluster will come away in a sideways and not rearward direction to reveal all of the bulbs. Hope this helps.