Does the car jerk when you stop, or can you make it stop so gently that you can't really tell when it stopped moving by letting up on the brake as you get close to motionless?
If it always jerks, even with very light pedal pressure, the rear calipers are sticking (or the fronts, or both).
If the rears are locking up, I'd suspect that the fronts are sticking and you are braking with the rears only!
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!