Door Locks on a g20 VERY looooose
 

Like the topic says, when i close the door, and even lock it, i can move the door inches out and in ?? how can i adjust this :s

you can adjust the door post locking bolt in a little to give a firmer contact with the door lock inside the edge of the door. the other option or in addition to is to loosen the door lock bolts and slide the lock in towards the outside of the door.

Have you checked the molding on the edge of the door? Bad or missing molding can cause the door to not seat properly upon closing.