DIY Changing Fog lamp Bulbs & W203/CL203 Fog Lamp Thread
Oh and try using the search function or going back to the first page of this thread...its amazing what you can find in a thread labeled "DIY Changing Fog lamp..." by just reading some of the posts
The Best of Mercedes & AMG
Headlights were easy.
Removed caps and old bulbs.
Put in new HID Bulb, plugged in extension.
Heres the somewhat tricky part, taking the cap that went over the bulb and drilling a large enough hole for the plugs to go through but small enough that the grommit on the HID plug will fit(this is so no what gets in).
Mount ballasts and plug in.
Good to go.
Now for the fogs, little bit harder.
Start with the right one, real easy, turn the wheel all the wheel in either direction, which ever you feel you have more room.
Unscrew bolts from wheel well shield.
Unplug bulb, plug in new bulbs, mount ballast somewhere in area, assembly HID.
For the left, your probably going to need an extra set of hands.
Jack the car up a bit, turn the wheel to one side, easier to go in towards the car on this one.
Remove three bolts from wheel well shield and one black rivet.
Proceed to remove rivets from underneath shield, pull shield off.
Now as soon as you take this off your going to see the washer reserve, fog light is in the front of it.
Have someone pull the bumper back(or push towards front of car) so you can get your hands in there and pull bulb out. (I suggest practicing with the bulb your pulling out to learn the motion of installing the bulb so you dont ruin the HID.)
Your going to have to have someone pull the bumper while you place the new HID bulb in the hole, then work your hand in there to tighten bulb in place.
From there mount the ballast(I used the 3m stick pads that came with mine to mount on side of washer reserve =] ) and plug in. Pop the cover back on and enjoy.
I took pictures after it was done, didn't have my camera during install, just of where I put the ballasts and what I was talking about with the cap.
Hope that helps, overall it took me and my friend Matt an hour and a half to do both sets and get everything cleaned up. I also pulled the parking light out because it looked like crap with the stock one, will pick up hyper white tomorrow so the silly messages on the inside go away.
- Finished!
- Right headlight, nice and tucked away
- What I was talking about with drilling out a hole and pulling the grommet through.
- Left ballast mounted, kind of hiding in plain sight.
- Where I mounted and stuck the ballast for right fog.
- View from inside.Mike
at youPlease read about that because that is soooooo not a good idea.
Love the Hot spots
Last edited by samaritrey; Apr 12, 2010 at 12:08 AM.
ing I was on my way to work this morning, turned the headlights on and my ABS light came on, almost immediately before reading your reply. Thanks lol. I pulled the ballast off and tucked it away, kinda across from where the right one is.That could have been bad! Thanks. Hahahah
Anyone know a decent place for me to find projector headlights for my year? Every time I search I only find 00-05, I'd rather not order off eBay if it can be avoided.
edit: just noticed you have 230, not sure if its visible from the front since your grill is different but i think the mounting is the same.
Let me explain. The factory 9006 incandescent bulbs come down at a right angle for the connector to go in, obviously not touching the fluid reservoir/tank right behind the fog light on the driver side. But 9006 HID bulbs protrude straight out.
I took the whole front bumper off, put the HID bulbs in, and when I put the bumper back on, the back of the HID bulb on the driver side where the 2 wires connect is jammed up against the fluid tank, causing the bumper to not quite go in/down far enough to where it was previously. It is not noticeable when looking at the car from a few feet away, but it was tough to get the 2 bolts to align properly when putting it back on so I knew something was up. Since this causes the driver side of the bumper to be pushed up/out, the beam from the driver side fog light is pointing slightly up into the air to where it blinds everyone, even though I have it aimed as low as it will go.
I have tried multiple 9006 HID bulbs from multiple manufacturers and they are all about the same length and all touch the fluid tank, so the only solution I can think of is to go back to the factory incandescent bulbs, which I really don't want to do, or to somehow make more room directly behind the bulb.

Any input on this would be greatly appreciated.
so while I am replacing that lens, I am going to upgrade all my headlight, fog and parking bulbs. I have halogens in all and don't want to do a HID upgrade (my headlights and fogs are the frosted type anyway). I am looking for the whitest halogen light possible (for aesthetics) while keeping the lights legal (DOT or Euro [E-code] approved). I will likely get all the same brand for fog, headlights and parking light bulbs to match if possible.
Based on your experience, do you have any suggestions for bulbs?
PS: This thread and forum has been ridiculously helpful

EDIT: I have gone with Phillips DiamondVision 5000k Halogens in fogs and low beam, and then AZN Optics LED for the city lights (day time running lights). The match is pretty good.
Last edited by Green Machine; Dec 13, 2014 at 10:22 AM.
I can't seem to find which forum member originally posted this, so I can give them credit. These instructions were PERFECT for my 03 c230k coupe and made the job VERY easy. You can't really go wrong.
Now I have a new fog light lens and all it cost me was the lens and my time (a whole lot better than hundreds of dollars from the stealership)





