The clip will release the locking ring yellow arrow in the cylinder and allow you to pull the cylinder out by the key.
Remove door lock cylinder audi a4.
Push down the clip to loosen the rod then pull the rod up and out of the door.
Unbolt the door lock assembly from the door and then pull the assembly out.
There is a plastic clip attached to this rod.
Hope you guys find it useful.
You should see a rod connecting the handle to the door lock assembly.
Strut funk dougie wood subscr.
Insert your paper clip approximately an inch and half into the hole in the cylinder red arrow.
This is a common fault on a4 vag cars mk 4 golfs skoda octavias seat leon beetle audi tt audi a3 you will need to remove the door card from the inside.
Repair kits are available so it may be possible to repair the lock barrel but for the effort htat is required to remove the door card i would replace the lock barrel rather than repair it.