Sean:

Either you have a bad fuse for the low beams, or you have a bad bulb.

Check the fuses first, since a new bulb it a bit more expensive than a fuse. If the fuse is good, get a new bulb and replace the old one.

I believe there is a cover on the rear of the headlamp assembly that pulls up to release. The bulb is held in place by a lock ring. Bulb plug into the harness, there is (or used to be) and clip you have to pry up to release the bulb.

7004 Halogen.

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!