I wondered about the cross and plaque, probably a memorial sight as you say. I came across a photo of an Opel truck that looks to have identical parts to at least some of the wreck, apart from the radiator being the same, the curved front axle bar can be seen on the floor just in front of it, but if the Opel truck was shaft driven rather than chain driven then there is clearly more than one vehicle present. Makes me wonder why there would be wrecked trucks in a memorial sight.