From experience, simple swing axles are dangerous, particularly a V8 W109 I don't know how 6.3s stay on anything less than a straight road. I got into some hairy situations with a 300SEL 3.5. Eugen Boehringer should have a driving school. I've never pushed a 116 so I don't know how surefooted it feels. A 126 rolls so much that I let up before the tires and suspension quit. A 140 is surprisingly nimble for its size and heft but I don't know if it's actually quicker around turns than a 126. A 124 blows away the heavyweights in turns

Sixto
87 300D