It will vary depending on if you have HID lighting or Halogen Lighting which you did not include in your question. 2007 Mercedes-Benz C280 headlight bulb general replacement procedure: Purchase the correct replacement headlight bulb(s) first, before disassembling the vehicle. See sources and related links below for replacement bulb information. Then consult your owner's manual for the headlight bulb lamp replacement procedure. As simple as it sounds, the owner's manual is the best place to start for bulb replacement instructions and illustrations. You may want to consider replacing both left and right at the same time in order to keep brightness and color equal (optional).
How do I change the nearside headlight bulb on my Vauxhall Vectra 2007
Bring it to the dealer!
you will probably have to take the complete headlight assembly out to get enough room to change the bulb.
how to replace 2007 Mercedes GL450 Headlight Bulb Low Beam
can you change the reflectors on a 2007 vectra
Changing a headlight bulb in a 2007 Buick Lacrosse can be done easily. Just remove the cover piece and change the bulb.
how do I change lightbulb for a 2007 escalade
No
Use socket
To change the low beam bulb on a 2004 Mercedes E320, first, open the hood and locate the headlight assembly. Remove the plastic cover or access panel on the back of the headlight to expose the bulb. Disconnect the electrical connector from the bulb, then twist the bulb socket counterclockwise to remove it. Replace the old bulb with a new one, ensuring not to touch the glass with your fingers, and reassemble the headlight by reversing the steps.
To change the sidelight on a Mercedes CLK, first, open the hood and locate the headlight assembly. Turn the headlight housing counterclockwise to unlock it, then gently pull it out. Disconnect the old bulb by twisting it counterclockwise, replace it with a new bulb, and reassemble by reversing the steps. Always ensure the new bulb is securely fitted before closing the headlight housing.
where can I buy a retainer clip for headlight bulb of my c200 mercedes