Where is the keyless door code hidden on a 2009 mercury mariner?

On a 2009 Mercury Mariner, the keyless door code is typically found on a label inside the owner's manual or on a card that came with the vehicle. If the code is not available there, you can also check inside the driver's side door frame or under the dashboard near the fuse box, where manufacturers sometimes place the code. If you're unable to locate it, you may need to contact a dealership for assistance.