a Q plated, Diahatsu engined, van conversion
http://www.ebay.co.uk/itm/mercedes-g-wagon-van-daihatsu-diesel-turbo-engine-12-months-mot-/121070790194?pt=Automobiles
The advert is poor on detail and has far to few photos to properly assess the quality and method of the "van" conversion. No detail of age, engine size or output. Nevertheless if I was living near I'd have a look