Time to return to the Pleasuredome and see if we (I will need lots of help) can finish this one off.
I am going to try D & 15.
D is clearly inside a body shop, where a restoration (not new work) seems to be taking place. The person in the foreground seems very over dressed for a body shop, so I suppose that he is the owner and/or designer, but if I need to know who he is, I don't have a clue. The car under restoration appears to be from the late 40's, or early 50's, and possibly Italian, so perhaps the unidentified person is the original designer.
15 is an unknown building under construction. From the picture I would guess the time frame is the 1930's, but it could be early post war. If one imagines the finished structure, it seems to me that the restoration work in D is occurring inside this building, given the amount of the building visible in the background.
I going way out on a limb and guess that the person in the picture is Sergio Pininfarina, given that the Pininfarina establishment was founded in 1930, and Battista's, ("Pinin") son Sergio was in charge after Pinin's death in 1966, and was reputed to be a very "hands on" president. Sergio was born in 1926, so, given the clothing style, the person in picture D appears to be about the right age.
I'm probably way off with this scenario, but perhaps it will trigger some ideas with other AutoPuzzlers who will proceed to complete the puzzle of the Pleasuredome.