How do you change cornering lamp on BMW 645ci?

To change the cornering lamp on a BMW 645ci, first, ensure the vehicle is turned off and parked on a flat surface. Open the hood and locate the headlight assembly; you may need to remove the headlight cover or access panel. Disconnect the electrical connector from the lamp, twist the bulb socket counterclockwise to remove it, replace the old bulb with a new one, and reassemble everything in reverse order. Always check the new bulb's fit and functionality before closing the hood.