2020 CPO XC90 7 passenger. On recent trip my wife dropped a nice ring (one of her favorites) behind the middle seat center armrest. It seems to have migrated behind a piece of plastic under the leather through an open area in the seatback below the armrest. We have carefully checked the seats and floor. Does anyone know how to remove the folding armrest to allow better access to the area? There is a strange and difficult to access space there as we were able to recover 2 pennies, a dime, and a nickel, but no ring so far. Any ideas or previous experience removing the armrest would be greatly appreciated--Thank you!