Usually it is really helpful to take a decent time to plan the interior design, but due to my available going-to-be-brother-in-law
for one day, I had to do this at night during my well deserved sleeping time. Taking the measures from the carpet I came to this Sketchup model:

VW T4 Project – Interior construction – beddinge as a couch, having 5 cm left as a 1,95 cm guy while sitting

VW T4 Project – Interior construction – right side view – top rectangle is roof

Fortunately at this time I had a left over sofa-bed from IKEA called Beddinge around, which I would like to include into my interior design. It is foldable and usable as a couch and therefore perfect as a the heart of my low cost campervan VW T4:

It is possible to pull the seating area and get an full 140 by 200 cm bed by that:

VW T4 Project – Interior construction – front right view

VW T4 Project – Interior construction – back right view