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M-Class (W163) 1998-2005: ML 230, ML 320, ML 350, ML 400 CDI, ML 430, ML 500, ML 270 CDI

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Old 05-29-2010, 05:37 PM   #1
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fog lights on 1999 ML320?

i have a 1999 ML320. I'm trying to install fog lights but I'm not sure if the fog lights even work on the car. It looks like it's all built in and stuff but it never came with any bulbs.

anybody know if the fogs really work?
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Old 05-29-2010, 06:33 PM   #2
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Yep...they really work...and very well I might add. The H3 bulbs fit into the headlights themselves. Already wired..pretty much plug and play...BUT you might have to visit a dealer to have them hook up a hand-held computer to energize them via the dash switch. While you're at it, see if they can also enable the green dash indicator for the fogs. Its buried down in one of the diagonstic menus. These PIAA bulbs are my favorites...emit a very bright yellow light ideal for fog.

http://www.amazon.com/13556-Plasma-C...2&sr=8-1-spell

Well worth the effort !!!!!

BTW...save yourself a LOT of aggravation and remove the entire headlight assembly instead of trying to squeeze a bulb in from the engine compartment. Pop the hood, remove the piece of trim directly below the headight and remove 3 10mm small bolts and the whole assembly is easily removed.

HINT : Do one side at a time, so you can refer to the other.

Do not touch the glass part on a halogen bulb. If you do carefully
wipe with windex on a paper towel to remove skin oils.
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Old 05-30-2010, 12:32 PM   #3
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The fog lights are probably burnt out. Replace the h3 with any brand you like. Yellow is preferable for rain, fog, snow.

The fog lights don't need activated by the dealer. They simply turn on with the dash rocker down. The driving lights with the dash rocker up require a separate lighting fixture and activation by the dealer.
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Old 05-30-2010, 09:53 PM   #4
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Quote:
Originally Posted by springerfever View Post
Yep...they really work...and very well I might add. The H3 bulbs fit into the headlights themselves. Already wired..pretty much plug and play...BUT you might have to visit a dealer to have them hook up a hand-held computer to energize them via the dash switch. While you're at it, see if they can also enable the green dash indicator for the fogs. Its buried down in one of the diagonstic menus. These PIAA bulbs are my favorites...emit a very bright yellow light ideal for fog.

http://www.amazon.com/13556-Plasma-C...2&sr=8-1-spell

Well worth the effort !!!!!

BTW...save yourself a LOT of aggravation and remove the entire headlight assembly instead of trying to squeeze a bulb in from the engine compartment. Pop the hood, remove the piece of trim directly below the headight and remove 3 10mm small bolts and the whole assembly is easily removed.

HINT : Do one side at a time, so you can refer to the other.

Do not touch the glass part on a halogen bulb. If you do carefully
wipe with windex on a paper towel to remove skin oils.
Quote:
Originally Posted by netjob711 View Post
The fog lights are probably burnt out. Replace the h3 with any brand you like. Yellow is preferable for rain, fog, snow.

The fog lights don't need activated by the dealer. They simply turn on with the dash rocker down. The driving lights with the dash rocker up require a separate lighting fixture and activation by the dealer.
Springerfever is correct. The Up position is for the front fog lights only and the down position is for turning on both the front and rear fog lights. There is also an accessory fog light plug behind the left headlight assembly for external fog lights. The plug's power is switched on and off at the same time as the front fog lights.

The ML did not come with the fog lights installed because of some state fog light regulations. They are most likely not burnt out but simply not installed. I use my white fogs in my 98ML for running lights. I had to get my fog lights activated by the dealer in my 98ML.
Mike
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Old 05-31-2010, 01:07 AM   #5
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Hey Thanks guys for the responses.

Today I went to the car shop and bought myself an H3 bulb. I plugged it in and I was hoping for a green light when I pressed the front fog button on my car. And again, it does not work. So according to Springerfever, should i go ahead and go to the dealership and unlock or something? Is this going to cost me?
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Old 05-31-2010, 01:13 AM   #6
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Oh yeah, also, do I have to get it unlocked by a dealership or can I go to my own mechanic nearby?
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Old 05-31-2010, 04:29 AM   #7
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The foglight activation itself is a seperate event. The grren light dash display is a seperate event. After installing the H3 bulb (you will need two, one for each side) you might have activation w/o the green light illuminated. Drive up to a store front window(acts like a mirror) and activate the fogs with your regular lights on LOW BEAM! Fog lights cut off when regular lights are on high beam. If the fog lights do not energize, you need the dealer to activate. Not sure if an independent shop can do this for you. The dealer will probably charge you but if you bought from the dealer, they might not.

The green light indicator is a total different choice in the drill down menu with the dealer computer. Good luck !!
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Old 06-03-2010, 02:30 AM   #8
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Hey guys... so new question..

my mechanic should figure it out but im curious, there's no like, instructions or some type of manual that helps activate the fog light button?
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Old 06-05-2010, 08:41 PM   #9
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and now. my mechanic is saying that there are no fog lights on my car.....


......

any estimation on how much the dealership might charge me for the light activation?
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Old 03-24-2011, 04:11 PM   #10
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They charged me 20... It needs to ge done my Mercedes because it is controlled by the AAM.
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Old 03-24-2011, 05:10 PM   #11
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There is a way to activate the fog light by jumping the relays. I found this when I was researching on the subject. Luckily I didn't need to jump my relays. My fogs worked when I installed the bulbs. But, no green light dash indicator.
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Old 04-01-2011, 07:42 PM   #12
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This upgrade is very easly accomplished. The only difficulty is changing coding in AAM, which can only be accomplished at the dealer or a shop that has acces to DAS. First coding for AAM module needs to be changed to ROW (rest of the world), and to activate green indicator light changing coding in IC (istrument cluste) to enable fog lights does the trick. Dont forget to install light bulbs lol.

Did it on my and my friends ML's in about 20 min for both cars
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Old 04-04-2011, 11:07 AM   #13
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for 99 ML, the fog light is inside the main headlight, right? is there external fog light that can be installed on 99/00 ML320 bumper?
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Old 04-06-2011, 05:35 PM   #14
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Quote:
Originally Posted by blue960 View Post
for 99 ML, the fog light is inside the main headlight, right? is there external fog light that can be installed on 99/00 ML320 bumper?
I hadf external fog lights installed under the bumper. I used Hella FF100's. Work pretty good. I also had to go to the dealership to have them activated and the green light in the dash turned on.

Click the image to open in full size.
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Old 04-08-2011, 04:44 AM   #15
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Hi stiggs ... Do u mind taking closer pict of your Hella foglight pls. how did you install them...any additional bracket you use? How to connect the cable ..any error message? Thank you
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Old 04-11-2011, 09:30 PM   #16
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Hi stiggs ... Do u mind taking closer pict of your Hella foglight pls. how did you install them...any additional bracket you use? How to connect the cable ..any error message? Thank you
I'll try to take pics tomorrow. I didn't install them. I had an independent shop install them. I think there is a wiring harness near the drivers side headlight they hooked them to.
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Old 04-12-2011, 05:04 PM   #17
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Here are some quick pics. First two are outside the bumper, last two show metal bracket inside the bumper:

Click the image to open in full size.


Click the image to open in full size.



Click the image to open in full size.



Click the image to open in full size.
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Old 04-14-2011, 12:32 PM   #18
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great ... thanks for the picture
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Old 04-14-2011, 12:32 PM
 
 
 
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1998, 1999, activate, assembly, dash, disassembly, fog, fogs, install, lamps, light, lights, mercedes, ml320, unlock



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