I have just acquired (from a friend with a CLK 55) the following:

quantity: 2 (left and right sides)
Mercedes-Benz P/N # 203-820-25-26
description: Bi-Xenon HID ballasts (made in France), connectors, and bulbs

Given that these parts list for $450.00 per side, I SCORED!!!
All I had to do in return was build a very simple LAN and install some software on my lunch break!

As Mr. Checkov was fond of saying, "No problim,, Keptin."

Stay tuned...