Yes, I have heard that some dealers would store the tops (when I was in Louisville Ky they would do that).
I just plain do not want to mess around with the hard top. For winter storage, I leave the soft top in place, covered with a good cover, and wait for the spring.
I did the same thing with my 107, I would echo Douglas's experience with the window, but judging from the other comments, this may have been a function of the way the top is folded, stowed, etc.
Jonny B
1967 250SL Auto