Standard Volkswagen Key
Place the VW key down with the Volkswagen logo-button pointing up. Insert the tip of your screwdriver in the seam between the logo and the key blade. Push the screwdriver toward the key blade to release the key blade from the back half of the unit.
Push the clips on the back half of the remote unit inward, and then pull apart the halves of the unit to expose the battery. Lift the battery out of its holder to remove it.
Insert the new remote battery. The “Positive” symbol on the battery should be pointing toward the Volkswagen logo-button.
Push the two remote halves together to secure the unit, and then push the key blade unit back into place to attach it.