As of 2009 the Audi A4, A5 and S5 will have a new type of fuel filler cap opening system. Audi will continue to use the button style opening in the Q7, A6, A8 and TT so there will now be two ways to open your fuel door, depending on what Audi you have. The fuel door will continue to be on the passanger side to prevent the driver from stepping in oil at the service station when refueling thier vehicle. You will just have to remember a few new steps at the pumps:
First, you will have to remember the vehicle has to be unlocked in order to open the push style fuel door.
Second, after the vehicle has been unlocked, press down on the rear portion of the fuel door and then release, the door will lift open.
Third, after opening the fuel door, unclick the gas cap and place the filler lid in its designated port on the inside of fuel door.
Fourth and finally, when putting the fuel filler cap on with the new style, you will only be able to turn the fuel cap 1/4 turn clockwise untill it is secure in the closed position.