I took it to a shop not sure if they are national or not (cartoys) they did it for $150ish did an amazing job and used special hot sealant glue and guarenteed it, I called mercedes they will do it but they charge $120ish an hour to install I think it takes 2-3 hours to install, cartoys much cheaper, plus the OEM one mercedes sells doesnt have the LED brake light so mercedes will use up time trying to figure out how to wire it, I didnt do it myself because there is no way I could drill holes in my car, but if your comfortable it looks very easy to doMYML350 - 3/31/2005 8:22 AM
I just ordered it. Is this something I can install myself. It does not look that hard, however, I have yet to see the directions, and I am a bit concerned about the electrical part for the LED Brake-Light.
Do you recomend me going to MB directly or will they not even do it..
I love it to makes the ML very sporty, and I have the saftey of having at least one light turn on 250 milliseconds faster than the rest of my lights!bocobod - 3/31/2005 4:45 PM
Love that spolier B-Hawk! Wish I had seen it before I had the OEM one installed 
you just attach the black and red wires to the pos/neg wires that lead to the third brake light. You don't even need a load equalizer. I also have the LED third brake light and LED replacement bulbs for the brake lights. Again no load equalizers whatsoever and no effect on the electrical system for any of the three LED options I have installed.MYML350 - 4/14/2005 4:39 PM
Spoke with MB today,
They say they cant install Spoiler w/ LED using 3rd breaklight, because it messes with the eletcrical system.. IE. ABS etc. Now what.. Do you think I will have any problems? Should I just have it installed without the LED.. MB says its not a factory part... What the f...