How can I get into my 2012 Lincoln Navigator if the battery is dead?

If the battery is dead, you can unlock your 2012 Lincoln Navigator using the key fob's physical key. Look for a small slot on the driver's side door handle to insert the key and unlock the door manually. Once inside, you can jump-start the battery using jumper cables and another vehicle or a portable jump starter. If the key fob is also unresponsive, the physical key will still work to unlock the door.