I would not worry too much about opened due to crash fault code if there are no obvious signs of crash damage and repair I have had it come up on mine while in my ownership without crash.
It does show adaption limit surpassed for all 4 keys so i would first try new batteries in keys and try to re-match keys to car.
Code:
Matching procedure for new remote keys
‒ Unlock the vehicle from the outside via the driver's door lock
‒ Switch on the ignition (using additional key).
‒ Lock vehicle from outside with the key to be adapted by way of the driver's lock door.
‒ Within 5 seconds press "unlock" key of remote key until next memory position is reached (3x in example).
Each time the button is pressed the hazard lights will flash to confirm.
‒ Wait 5 seconds.
‒ Then press "unlock" key again. This unlocks the vehicle =>key has been successfully matched.
‒ Switch off ignition and remove ignition key.
‒ Check function of new remote key.
__________________