I searched and was unable to find info on the third break light, so sorry if alreday asked; but my third brake light is out, so do I have to replace just interior light strip, or the whole light assembly? I belive it's LED, correct? Also my Avant has stock HIDs and their is a slight color diffrence between either headlight, possibly mismatched bulbs or possibly faded.

 

Whatever guys here will tell you will be a approx guess (I am only talking about the cost factor, technically the guys here are great). Also dealers have different prices (sounds strange though). Your best bet is to call or visit your dealer, and see what he is quoting you for both the HID and Brake light. If it is reasonable, get it fixed or at least find the type and specs from the dealer and try to get it from online vendors.