I own a 99 c43. I changed my OEM hid bulb to a 6000K bulb sometime ago. Recently I started to notice that only the upper half of the headlight is much brighter. I thought it was the bulb. I changed back to stock and I noticed that it is like that, only that the brightness of the upper headlight somehow blend in with the lower part.

Is there something wrong with my headlight or the HID system? I seriously hate the way it look now! (90 degrees "L")

While I was installing the bulbs I noticed that there is a free cable and an empty bulb holder below the hid bulb. I assume that would be a driving light??? Is that functional? what size bulb fits in there?