What if a passenger was the ONLY one left to land the plane? Could they theoretically do it, without ANY previous knowledge or training? In this video you can learn the necessary steps to be taken in the cockpit in order to set the aircraft up for a safe auto-land.
There are around 20 different individual steps that need to be taken and none of them can be omitted or done in the wrong order. This all depends on the passenger getting into contact with Air Traffic Control and being reasonably close to a suitable runway.