3rd bed Elddis Accordo 135

Is it the one with the fold out bed that fits across the front seats and the passenger seat?

Not on the websites I have seen BB. Some 135 models have a peculiar folding table, without legs, that fits across the swivelled seats, and onto the dinette at an angle. If it is this model, I can understand the OP’s apprehension about a six year old using it. I will try and find a photo, as I have never seen an extra bed like this one before.

that looks like a homemade job, the next video on youtube shows a similar arrangement but with the 'bridge' made from plywood slats, not the metal frame.

even with the metal frame, it should be possible to mount it square into the backrest of dinette, extending (again square) onto the squab of the swivelled drivers seat.

certainly looks like a pretty cheap afterthought, perhaps originally there were no plans to have an extra bed..

my SIL made a bed for his (then) young daughter in their PVC which was not dissimilar to the metal framed effort except that it was made with a folding ply frame, lay across the van with the cab seats in position and it was cut to a template that followed the contours of the Fiat dasboard, leaving no gaps at all for any potential problems....he even had the shaped mattress mounted onto the frame and this folded with the frame for storage. very innovative.

in a primarily two berth van, a supplier has to decide what level of production investment to make in providing an 'occasional' 3rd berth.

some go full tilt and install a drop down roof bed (single or double) as a customer option, some are at the other end of the scale....price certainly has a bearing.

the product Cabbunk is a cheap effective way of adding a single child berth across the cab area. effectively its a 'hammock' slung on 4 mountings which can take a child....there is even a double version...

Brue, that was my 'homemade' observation and my earlier description was along the lines of what you describe....flatten dinette, feet on swivelled cab seat.

assuming this might not have been designed in by the converter (pute two berth) the Cabbunk think actually seems a decent product.

Had a look at Cabbunk. It’s an old idea updated. Our Suntor A60 van, built in the 1970’s, came with a similar stretcher type bed, that went across the whole length of the van with the pop up roof ‘popped’. We bought the van off my BIL, he toured in it with his wife, and their young daughter, who slept up in the roof. Great idea though across the cab in today’s MH’s for small children.

This is a link to what we had as a first camper, really tiny, but we loved it. It doesn’t show the bunk, but basically it went up in the roof space. https://heritagemachines.com/restorations/rare-morris-suntor-camper/