Ahh, the 'Zibelfritzer' .... it was a debacle from the moment it was acquired (way, way before my time). The spare wheel was the least of its myriad of problems!! Virtually the only original parts were the floor pan and some fittings.
NOT my favorite collection vehicle, and I would have been quite happy to see it gone/replaced with a more original example. I'd better stop at that point.
Mike C