1. Locate the keyhole for the mechanical key. It's usually located inside the lower rear panel of the car, behind the license plate.
2. Insert the mechanical key into the keyhole.
3. Turn the key clockwise to unlatch the trunk.
4. Lift the trunk lid to access the car's interior.
5. Once you're inside the car, you can pull the emergency release lever to unlock the doors and start the car.
It's important to note that this method will only work if your car has a mechanical key backup for the key fob. If your car doesn't have a mechanical key, or if it's lost or damaged, you'll need to contact a professional automotive locksmith to get into the car.