fkong777

For pass couple of nights my 00 ML55 passenger side headlight is changing to different color.. Purplish one night then it is blueish the next. Is my bulb going or the ballast?

sosh

Most likely the bulb

poonamt93

No,your bulb is not going.
There is no power going to the light assemblies when you have your keys in the off position, when you have your lights off, and you are not modifying the connector's wiring.. so it is pretty safe.
Just take note and be careful pulling the decorative molding on the front/bottom of the headlights.. It is easy to break or lose something if you are not careful..

sosh

Bad advice. He says that when its on it changes color has nothing to do with the key position or the wiring. There is no need to pull the molding. Believe that you have not a clue and this is not the first time. Perhaps your reading is deficient.

fkong777

How do you remove the HID bulb? do I have to loosen the hex bolts. I cant twist the bulb at all.

55fanatic

I always loosened the nut and took the plastic trim off

fkong777

thanks that is such pain to just remove a bulb.

55fanatic

I dont think it could be any easier to change these bulbs, lol...

that is the only PITA part but I can do a full bulb swap in about 10 minutes, luckily you dont have to do it so often