You can push it in with your finger but it takes force.
My fuel door wont lock on my 2007 audi a4.
Another bug bear are the wires inside socket in the door between the pillar door.
Changed door control module via ebay all ok now.
If not also check your battery s voltage to make sure it s reading 12 volts with the ignition off and 14 volts with the ignition on and the alternator running.
As the door latched cables wires seemed fine.
As you push it in you can feel the gears turning.
If you open the fuel door and lock the car the pin extends.
If a fresh battery fixes the problem consider yourself lucky.
If you notice that despite being not terribly far away from the car it is not reacting to the queue to lock unlock the vehicle then it might be time to replace the fob battery.
This article applies to the audi a4 b7 b8 2005 2015.
I had a door on my 2007 b7 a4 which didn t lock.
My diagnosis was the door control module.
Are you having problems.
With the fuel door open as the image displays press the plunger down to lock into position.
The electrical connection for the fuel door button on some audi s isn t secured well.
Central locking didn t flash lights.
Make sure the electrical harness is connected.
On the side of the gas door remove the panel from the trunk to locate the electrical harness.
The first and most obvious thing to check is your key fob battery.
If the plunger does not snap into locking position this component is damaged and needs to be.
Door lock problems diagnostic guide.
Window sometimes didn t work.
If t0m3k found that the pin went in with little pressure i suspect the gears in the motor are not functioning properly.