How do you change the low beam headlight bulb on a GL 450?

To change the low beam headlight bulb on a Mercedes-Benz GL 450, first, ensure the vehicle is off and the key is removed. Open the hood and locate the headlight assembly; remove the cover or access panel on the back of the headlight. Disconnect the wiring harness from the bulb, twist the old bulb counterclockwise to remove it, and then insert the new bulb by twisting it clockwise. Reconnect the wiring harness and replace the cover before testing the new bulb.