Bad airflow sensor will give you fits on those cars, too -- idles rough, misfires terribly at large throttle position, but runs well at speed.

Check all the connections, particularly the manifold pressure sensor and the cam position sensor, they may be loose or incorrectly installed.

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!