But let's see what else can we squeeze out of it!
Step 1: Moving Front Seats
Step 2: Removing Central Seat
Fold down the seat's back (1), tilt the seat up (2), unlock it (3) and lift it up (4).
Now place the seat on its back on the passenger's front seat (5).
Notice: I have tried to fold the passenger's seat first and then place back central seat on top of it, but it doesn't seems stable enough and we don't save that much space this way. Also when the passenger seat is not folded, we keep access to the tray on its back which may be great for holding a mug of tea and snacks.
Step 3: Placing Side Seats
Remove both remaining back seats exactly the same way as the central one. It's easier to keep them placed inside car instead of taking them out. There's plenty of space to manoeuvre them easily.
Removed seats turn 90 degrees inward and place them on the floor just behind the front seats.
This way we can squeeze a 90 cm wide mattress. Not much for a couple. Good thing is the seats for pretty flat and even surface.
Step 4: Even Wider Space!
You just need to tilt the seats' backs a little bit and push seats aside. This way you will get less even surface and a gap in the middle of seats, but this will be no problem at all if you decide to sleep with you heads on the back of the car and legs in the front.
Step 5: Conclusion
This way you can travel comfortably with kids and let them sleep in a tent outside, or travel just with your partner and still have plenty of space for picking hitch-hikers on your way!
Last thing. As Peugeot cooperates tightly with other French car manufacturers this instructable may work as well with Citroen Berlingo and Renault Kangoo.