Does this car have KE-Jetronic injection? If so, you have a sticking idle control valve that closes when you take your foot off the gas pedal and fails to open fast enough when the engine slows down. The result is a stall before the car comes to a stop.

Only happens on hard stops or rapid deceleration, driving lightly allows the valve to open and the engine to restart before the fuel pump switches off.

It it happens while driving at open throttle, it's the fuel pump relay and/or fuel pumps.

If you have LH-Jetronic (electronic multipoint) injection, you have another problem.

Peter

__________________
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!