I have never pushed it hard enough for the car to slide or lose grip. There is just too much body roll, a very high center of gravity, and too much weight. We all know these cars were made to go fast on the Autobahn, not handle like sports cars, so you can't blame the W123. For what it is (a 3,600 lbs luxury sedan that was developed in the 70's that has a lot of weight, high center of gravity), it's a great handling car. I'm guessing when it first came out (like Randall mentioned), it was probably one of the best handling sedans out there, maybe only 2nd to BMW. And we all also know BMW's focus more on sport than luxury so there's not surprise there.