Thanks for that splendid review, Ben. The truck is, indeed, basd on the current style Unimog. I had hopes that the new fire engine would use this chassis. Maybe there are plans for one based on it for the future. Meanwhile, here's a great custom by dreamteam combining the construction truck chassis and a 3880 rear body.
This was on my to buy list, but I'm really trying to limit my Playmobil buys at the moment (I have plans for the new fire station set when it comes out you see).