It will vary depending on if you have HID lighting or Halogen Lighting and model year which you did not include in your question. Mercedes-Benz A-Class 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).
To change the front dipped beam bulb on a Mercedes B-Class, first, open the hood and locate the headlight assembly. Remove the cover or dust cap on the back of the headlight, then disconnect the electrical connector from the bulb. Carefully twist and pull the old bulb out, and insert the new bulb without touching the glass. Reconnect the electrical connector, replace the cover, and test the new bulb to ensure it's functioning properly.
Without exact model I can't check exactly but see sources and related links below for an easy place to try.
You actually only change the bulb. They are held in harnesses inside the hood, just behind the actual headlights. Once you start tinkering with it, you can see how it works. It's easy to change the bulbs in a C-Class Mercedes.
come si fa a sostituire lampada bixeno anteriore Mercedes r
how do you change heater blower resister merc a class
All Mercedes C class are chain driven.
How i can change the engine oil for my my mercedes benz 240c 2003?
unplug it
Inside the trunk.
On a C-Class 1994-2000, you don't actually change the headlights, just the bulbs. They are located on the inside of the engine compartment. They fit easily into little harnesses, just behind the headlights.
MB C240 is every 13,000 miles.
Mercedes-Benz A-Class was created in 1997.