2006 c230 Sport: BiXenon; passenger side bulb turned purple.
Just confirming that I need to replace the bulb for this? if so, where do I buy the bulb from? RockAuto.com has many options for this.
Furthermore, is it an easy DIY replacement?
Thanks in advance!

Replacement is easy.
Philips Ultinon Xenon from the Aachen plant in Germany are the best lamps out there.
Weird thing is, that it started to flicker intermittently, and would stay on for a little while (still with the purple color).
Nevertheless, I ordered new bulbs from ebay for $117 USD including express shipping. Hopefully, this is just a bulb issue.




