It's more likely you pulled the boost control line off the overboost control switchover valve on the firewall, it isn't very far from the oil filter.
Check to make sure the white plastic hose from the intake manifold (just about dead center) is connected on both ends, and that everything it connects to has all the bits attached, too -- it goes to the ALDA, the switchover valve, and the blue vacuum amplifier on the fender.
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!