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How to change the headlight on a Mercedes C Class (2007-2014)

Do you need to replace a headlight on your 2007 to 2014 Mercedes C Class but don't know where to start? This video tutorial shows you step-by-step how to do it!

The video was filmed in our workshop where we strip down and rebuild every car when producing our best-selling car repair manuals. Our 2007 to 2014 Mercedes C Class manual covers diesel engine 07 to 63 reg vehicles.  

You can get it in the traditional printed book, or you can get the online manual version which comes with 20 more videos just like this one! You can find both versions of the manual here

How to change the main beam bulb on a Mercedes C Class

Vehicles up to 2012 model year

  1. Rotate the inner cover anti-clockwise and remove it
  2. Push the wiring plug downwards to release it and withdraw the bulb from the reflector
  3. Pull the bulb from the wiring plug
  4. Press the wiring plug onto the new bulb then align the lower edge of the bulb with the socket in the reflector (and the upper lug with the slot). Then push the wiring plug upwards until it engages. Take care not to touch the glass with your fingers
  5. Refit the cover then rotate it clockwise to secure

Vehicles from 2012 model year

  1. Rotate the inner cover anti-clockwise and remove it
  2. Rotate the bulbholder anti-clockwise and withdraw it from the reflector
  3. Pull the bulb from the holder
  4. Press the new bulb into the holder, then insert it into the reflector socket and rotate it clockwise until it engages. Take care not to touch the glass with your fingers
  5. Refit the cover then rotate it clockwise to secure

How to change the dipped beam halogen bulb on a Mercedes C Class

Vehicles up to 2012 model year

  1. Rotate the cover on the rear of the headlight anti-clockwise and remove it
  2. Pull the wiring plug from the bulb
  3. Push the retaining clip to one side, then fold it downwards and withdraw the bulb from the reflector
  4. Manoeuvre the new bulb into the reflector socket by aligning the lug on the bulb flange with the slot on the socket (arrowed). Secure it with the retaining clip. Note that the bulb will only fit correctly in one position. Take care not to touch the glass with your fingers
  5. Press the wiring plug onto the bulb contacts then refit the cover

Vehicles from 2012 model year

  1. Rotate the bulbholder anti-clockwise and withdraw the bulb from the reflector
  2. Pull the bulb from the holder
  3. Press the new bulb into the holder then manoeuvre the bulb and holder into the reflector socket. Rotate it clockwise until it engages
  4. Refit the cover then rotate it clockwise to secure it
  5. Bi-Xenon High-intensity discharge bulb

Changing the Bi-Xenon High-intensity discharge bulb

Caution: Bi-Xenon bulbs are pressurised to approximately 22 bar. Take extreme care when handling these bulbs - wear safety glasses and gloves

  1. Due to the high-voltages required to produce the electric arc between the bulb's electrodes, disconnect the battery, then wait at least 10 minutes for any residual electrical energy to dissipate
  2. Rotate the cover behind the dipped beam location anti-clockwise and remove it
  3. Squeeze together the ends of the retaining clip and fold it upwards
  4. Carefully withdraw the ignition unit/bulb from the reflector
  5. Disconnect the wiring plug from the ignition unit
  6. Refitting is the reverse of removal. If a new unit/bulb has been fitted, the systems operating counter must be reset to zero using Mercedes STAR diagnostic equipment (or equivalent). Entrust this task to a Mercedes dealer or suitably equipped specialist