This particular Pagoda demonstrates what a factory original W113 undercarriage looks like! It has only been cleaned.
Original Daimler-Benz undercoating of this era is a rough texture and beige in color. If you encounter a black undercarriage it has been resprayed for some reason.
Original Wheel Wells, aka Wheel Houses
The wheel wells you see above are all factory original, having only been cleaned! Yes, the factory painted Pagoda wheel houses the color of the exterior body.