No model year was given in question, also it will vary depending on if you have HID lighting or Halogen Lighting which you did not include in your question. Mercedes-Benz E 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).
how to replace 2007 Mercedes GL450 Headlight Bulb Low Beam
take the big thing of and twist the bulb and put it in
pop out the bulb. replace. Please be a little more specific.
The low beam bulb, on a Mercedes Benz ML 350, can be accessed from the back of the headlight. Take hold of the bulb, push in and turn, the bulb will come out and can be replaced.
Replace headlight bulb only when blown.
Open the Hood, behind the headlight housing there are two round black moisture covers that spin off. Depending on which bulb you want to replace, spin off the corresponding cover. Depending on which bulb type you have, (Xenon or Halogen) unclip the bulb connector and then take out the clip spring holding the bulb in place. Install is in reverse order. Good Luck. Open the Hood, behind the headlight housing there are two round black moisture covers that spin off. Depending on which bulb you want to replace, spin off the corresponding cover. Depending on which bulb type you have, (Xenon or Halogen) unclip the bulb connector and then take out the clip spring holding the bulb in place. Install is in reverse order. Good Luck.
On older vehicles you replace the entire headlight. On the newer vehicles you just replace the bulb unless the headlight assembly is damaged.
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