Not sure on sliding the second forward, never tried. If they do, I would guess a level down low behind them. Something that a person in the third row would initiate.

For the bed, move the front seat all the way forward, pull the headrest, then recline it all the way back. When it gets to the point that it meets the second row, you may have to "help" it the last little ways down so that it is as flat as it will go and flush with the second row. Lower the third rows and the recline the second row.

Slept on mine a couple times. You have to be a back sleeper, I think. They aren't flat enough to go too far over on your side.