I have a 300SD. I know the W123 chassis is different from the W126, however, I found (once, mind you) that going 60Mph around a large sweeping turn will break the rear end out. The front stick fairly well, and I did not experience hardly any body roll at all. A well know Eurpoean mechanic in my area said that Mercedes Benz has the best front end made. He said BMW and all the others are under it.