I will agree that the windows are tall, and the car tall, giving the car with the hard top on, a rather unique look. However, once INSIDE this same car, those perceptions are left to the observers outside. The driver and passenger inside are left with astoundingly wide visibility that no 2-place roadster ever came remotely close to. It isn't always or just about styling, Mercedes always had engineers mixed up in styling, and Bela Barenyi was in this one.
Protuberant wheels? Don't think so. Large? Certainly for the time. My quote in the buyer's guide, just published: ...the new P110 and RA60 185-HR14 tires contained both bias and radial plies with stiff sidewalls. For the time, this gave the car a wide, sure footed stance when compared with other roadsters...
Of course that quote was really condensed in the edit; it was not specifically the tires, but the overall size of the tires and wheels.
If your artist friend does not like the Pagoda, that's OK. Plenty of others do, including many artists and people of taste.