Originally posted by RPM55
The gas flap is suppose to lock when you lock the car .
Yes, when you lock the car, the gas door has a little bolt that locks the door. You don't need to rig up a release system, you just need to have the lock system repaired. BTW, when using the central locking on automatic (when you reach 9 km/h) the fuel door remains unlocked. Then, when you exit the car, and lock the doors and trunk with the remote, the gas door locks as well.
Open the fuel door, lock the car, and see if the dead-bolt operates.