How to replace a headlamp bulb on a Mercedes 220cdi?

To replace the headlamp bulb on a Mercedes 220 CDI, first, ensure the vehicle is turned off and the keys are removed. Open the hood and locate the back of the headlamp assembly. Disconnect the electrical connector and remove the retaining clip or cover to access the bulb. Gently twist and pull out the old bulb, then insert the new bulb without touching the glass, reattach the clip or cover, and reconnect the electrical connector before testing the headlamp.