I wonder if anyone of you guys out there can enlighten me on this problem as to exactly which Benz models and in which year of manufacture are haunted by this great invention. When did this "jerk" feature start, which year and which models or were all of them affected as soon as they put in a particular catalyctic converter which somehow required a lot more of extra heating? Why don't the newer models have this feature or have the German designers gone back to school and copied the Japanese instead for their silky smooth gear changes?