Don't.<br> <br> You won't get anything but possibly worse<br> lighting.<br> Replacing just the bulb will not help at<br> all because all mentioned headlight setups<br> use the same Philips D2R Xenon bulb (or equivalent). Difference is in the optics - audi and BMW uses projector lens while Mercedes still uses the 'old fashion' reflector design. In the new E-class they finally switched to projector lens.<br> <br> That's the cause of BMW or Audi looking different<br> when you look at the headlights from outside - on<br> mercedes, light is more spread on the surface of<br> headlight than the 'spot' of projectors.<br> <br>
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