What do you base the percentage estimate on, Hans?.../...
Relevant question... Was long ago when I bought my own metallic green California Coupé (2008, subsequently sold), so I do not have clear memories.
At the time, I discussed this with many Mercedes guys "in the scene", and also my own gut feeling based on the ratio I have encountered over 25 years.
Furthermore, the numbers in for instance the German Club Pagode.
But, certainly a subject up for discussion. As mentioned, there is no official table from the Factory to look at.
To confuse the matter, a number of SA 41/7 cars have been modified. Their bodywork cut and welded, and a soft top compartment has thus been fitted to them
(as well as a soft top frame, as a result late type soft top frames are hard to come by, and expensive).