Just a thought on the "sports car" aspect of the W107...
I have an '87 560SL, and despite the power of the big engine, this car is clearly for touring. I've never pushed it around curves or even explored triple digit speeds (although it is wildly satisfying to be able to squirt from 70 to 90 in the blink of an eye to pass a truck).
Keep in mind, my previous sports car was a '74 MGB roadster...another touring car, albeit tiny. The Mercedes Benz handles dramatically better than the B.
But the W107, for me, is just a wonderfully comfortable touring car, which cruises along with its creamy-smooth ride, clearly designed for comfort, rather than curves.
Or, is it just that I'm sitting on my AARP Card?

__________________
Tom

'87 560 SL