Jordan, your car and mine look like twins! See my pic below.
Rich, I had the same question when I got my car repainted a few years ago. My conclusion was most all W113s have wheels painted the body color, but now and then you'll find one painted the top color. Hubcaps usually match the top. And it is true that some of the early MB press photos (like the one you posted along the water) show the wheel-top match.
In my case, I have a 1967 230SL in white (050) with a black top, but it had white hubcaps and wheels. My data card shows it have a white top. The car has been in my family since 1970, so we figure the first owner had the top repainted black, but the hubcaps remained white. In the end, I liked the look of the black hubcaps and a black top, so I went with that ... data card be damned!
My suggestion: Do what you think looks best.
Brian