![]() ![]() If your C230 has this type of bulb, we do not recommend that you attempt to change it yourself. These bulbs have a very high voltage that runs through them, even if the battery is disconnected. Some Mercedes-Benzs have high intensity discharge headlights, sometimes referred to as xenon lights. In some Mercedes-Benzs, the highbeam is the same bulb as the headlight and it is possible for the highbeam to work, but the headlight be burnt out even if they are the same bulb (and vise versa). Changing both headlight bulbs on your C230 at the same time will allow both bulbs to have the same intensity and prevent the new headlight bulb from appearing brighter than the bulb on the opposite side. Headlights grow dimmer by up to 20% over time and eventually burn out - for this reason, we recommend changing your headlights in pairs. If a new unit/bulb has been fitted, the systems operating counter must be reset to zero using Mercedes STAR diagnostic equipment (or equivalent).The video above shows you to replace the headlight in your 2003 Mercedes-Benz C230. Disconnect the wiring plug from the ignition unit.Carefully withdraw the ignition unit/bulb from the reflector.Squeeze together the ends of the retaining clip and fold it upwards.Rotate the cover behind the dipped beam location anti-clockwise and remove it.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.Take extreme care when handling these bulbs - wear safety glasses and gloves Refit the cover then rotate it clockwise to secure itĬhanging the Bi-Xenon High-intensity discharge bulbĬaution: Bi-Xenon bulbs are pressurised to approximately 22 bar.Press the new bulb into the holder then manoeuvre the bulb and holder into the reflector socket.Rotate the bulbholder anti-clockwise and withdraw the bulb from the reflector.Press the wiring plug onto the bulb contacts then refit the cover.Take care not to touch the glass with your fingers Note that the bulb will only fit correctly in one position. Manoeuvre the new bulb into the reflector socket by aligning the lug on the bulb flange with the slot on the socket (arrowed).Push the retaining clip to one side, then fold it downwards and withdraw the bulb from the reflector.Rotate the cover on the rear of the headlight anti-clockwise and remove it.How to change the dipped beam halogen bulb on a Mercedes C Class Vehicles up to 2012 model year Press the new bulb into the holder, then insert it into the reflector socket and rotate it clockwise until it engages.Rotate the bulbholder anti-clockwise and withdraw it from the reflector.Refit the cover then rotate it clockwise to secure.Then push the wiring plug upwards until it engages. 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).Push the wiring plug downwards to release it and withdraw the bulb from the reflector.Rotate the inner cover anti-clockwise and remove it.How to change the main beam bulb on a Mercedes C Class Vehicles up to 2012 model year ![]() Discover which Haynes Manual is best for you.NEW Fault Finder - Diagnose the problem. ![]()
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