Front Apron Fog Light DIY Repair/Troubleshooting




In Europe, some years back the light and fogs worked like this:
1st position: parking light or side marker lights on (as you seem to call them over there)
2nd position: driving lights on
1st pull: fog lights turned on and driving lights off
2nd pull: rear fog light turned on front fog lights still on and driving light off
Indicator stalk pushed forward: main road hi-beam driving light on
Today the rule is like this:
1st position: parking light or side marker lights on
2nd position: driving lights on
1st pull: fog lights turned on and driving lights still on
2nd pull: rear fog light turned on front fog lights still on and driving light also on
Indicator stalk pushed forward: main road hi-beam driving light on
So how does that get you

In Europe, some years back the light and fogs worked like this:
1st position: parking light or side marker lights on (as you seem to call them over there)
2nd position: driving lights on
1st pull: fog lights turned on and driving lights off
2nd pull: rear fog light turned on front fog lights still on and driving light off
Indicator stalk pushed forward: main road hi-beam driving light on
Today the rule is like this:
1st position: parking light or side marker lights on
2nd position: driving lights on
1st pull: fog lights turned on and driving lights still on
2nd pull: rear fog light turned on front fog lights still on and driving light also on
Indicator stalk pushed forward: main road hi-beam driving light on
So how does that get you


In Europe, some years back the light and fogs worked like this:
1st position: parking light or side marker lights on (as you seem to call them over there)
2nd position: driving lights on
1st pull: fog lights turned on and driving lights off
2nd pull: rear fog light turned on front fog lights still on and driving light off
Indicator stalk pushed forward: main road hi-beam driving light on
Today the rule is like this:
1st position: parking light or side marker lights on
2nd position: driving lights on
1st pull: fog lights turned on and driving lights still on
2nd pull: rear fog light turned on front fog lights still on and driving light also on
Indicator stalk pushed forward: main road hi-beam driving light on
So how does that get you

You already have front fogs fitted they are in the headlights and come on with the first clic out of the main light switch, with a 43 these front fogs are disabled and the feeds are fed to the ones in the bumper.
To fit them in the bumper you will need to fit either C36 or C43 front bumper c/w with fog lights and 2 wiring looms which just plug into the headlight to get the fog light feed.
SO TO END THIS THREAD, I was right the C43 works just like I explained and I guess the C36 is different or YOUR switch is wrong. Either way we now have 3 confirmations that my switch is wired correctly
You already have front fogs fitted they are in the headlights and come on with the first clic out of the main light switch, with a 43 these front fogs are disabled and the feeds are fed to the ones in the bumper.
To fit them in the bumper you will need to fit either C36 or C43 front bumper c/w with fog lights and 2 wiring looms which just plug into the headlight to get the fog light feed.
SO TO END THIS THREAD, I was right the C43 works just like I explained and I guess the C36 is different or YOUR switch is wrong. Either way we now have 3 confirmations that my switch is wired correctly
Your high beams should not be yellow, if your low beams are not yellow how are your high beams going to be a different color when they are the same exact bulb just separate filaments inside the bulb?

First pull activates fogs in headlamp. ALL of the W202 books I scanned in do say so
. Many states in the USA are required to have lower fogs connected into the tail lamp circuit anyway. (I can link you to some statutes) So unless this other forum can somehow give a legitimate explanation or reason why this is different, I'm inclined to go by the books, nothing personal brah. Please post the link as I would like to figure out why this is so confusing.

Your high beams should not be yellow, if your low beams are not yellow how are your high beams going to be a different color when they are the same exact bulb just separate filaments inside the bulb?

First pull activates fogs in headlamp. ALL of the W202 books I scanned in do say so
. Many states in the USA are required to have lower fogs connected into the tail lamp circuit anyway. (I can link you to some statutes) So unless this other forum can somehow give a legitimate explanation or reason why this is different, I'm inclined to go by the books, nothing personal brah. Please post the link as I would like to figure out why this is so confusing. 
EDIT: I NEVER knew HIDs were a stock option! Just googled it, I want them!
anyways apples to oranges, just noticed it in your sig to!
Still REALLY weird how the factory manuals are contradicting? wtf?The stock C36 MB setup does not allow you to have the fogs next to the hi/low beam on with the lower apron/tail fogs most likley due to jurisdictional laws in the US. I know Cali has some stringent laws in general. CT statute allows you to have at most two fog light systems illuminated in the front along with low-beams. Some states require fogs to be wired into the tail lamp circuit as well. I'm pretty sure It is unlawful to have hi-beams on at anytime with fogs, newer cars I think actually cut out the fogs when high beams are switched on, you can actually fail inspection in some states if they do not switch off
. Stupid if you ask me, the more light the better just as long as you are considerate of other drivers at night right?
Last edited by appatula; Jun 17, 2010 at 08:43 AM.
The Best of Mercedes & AMG

EDIT: I NEVER knew HIDs were a stock option! Just googled it, I want them!
anyways apples to oranges, just noticed it in your sig to!
Still REALLY weird how the factory manuals are contradicting? wtf?The stock C36 MB setup does not allow you to have the fogs next to the hi/low beam on with the lower apron/tail fogs most likley due to jurisdictional laws in the US. I know Cali has some stringent laws in general. CT statute allows you to have at most two fog light systems illuminated in the front along with low-beams. Some states require fogs to be wired into the tail lamp circuit as well. I'm pretty sure It is unlawful to have hi-beams on at anytime with fogs, newer cars I think actually cut out the fogs when high beams are switched on, you can actually fail inspection in some states if they do not switch off
. Stupid if you ask me, the more light the better just as long as you are considerate of other drivers at night right?
as they want to be able to ticket you using photo radar
It looks like that Appatula's headlight housing is different since he says that there are only 2 "distinct" bulbs in the housing namely: Low/High Beam and Fog light. The low/high beam shares 1 bulb by having 2 filaments in 1 bulb. In Euro specs, you cannot use the fog lamps if you turn on the High Beam similar to the ones in W124.
Maybe Mercedes Benz has created 2 different versions of headlight housings to accommodate laws that are applicable to each state. I am not creating an argument here. Just my observation.

It looks like that Appatula's headlight housing is different since he says that there are only 2 "distinct" bulbs in the housing namely: Low/High Beam and Fog light. The low/high beam shares 1 bulb by having 2 filaments in 1 bulb. In Euro specs, you cannot use the fog lamps if you turn on the High Beam similar to the ones in W124.
Maybe Mercedes Benz has created 2 different versions of headlight housings to accommodate laws that are applicable to each state. I am not creating an argument here. Just my observation.

BTW, with the exception of the CLK's green indicator lamp, the 1995 C36 manual reads the exact same as the 2002 CLK manual.
Good job to ALL for the inputs!

https://mbworld.org/forums/4101778-post21.html
I still think the manuals side with me but others claim that they are not accurate?

https://mbworld.org/forums/4101778-post21.html
I still think the manuals side with me but others claim that they are not accurate?
As for the 2-bulb and 3-bulb housings, still yet, the manual mentions only two bulbs. Even check your car/year on the Sylvania bulb fitment site, see what you get and post back.
As for the 2-bulb and 3-bulb housings, still yet, the manual mentions only two bulbs. Even check your car/year on the Sylvania bulb fitment site, see what you get and post back.
Refer to nos. 8, 9 & 10 in the image for the electrical connectors for the 3 distinct bulbs. Although manual does not state so, I can turn ALL the bulbs ON at the same time.




Lets ask this, can you have your high beams, low beams, fog light, AND the rear fogs on ALL at the same time?
This was the original problem I pointed out way back in the thread to 503C43 before going off on tangents. When I switch my rear fogs on (second pull on switch), it disables the foglights in the headlight and turns on my apron fogs as well. Another forum member's C36 did the same thing. The manual states first pull is fogs, second is rear fogs. I assume this means BOTH cannot be on at the same time? My W124 worked the same way my C36 does. WAYYY back in the thread 503C43 said his does not function like this all this other stuff was brought up after the fact and was dissimilar to my setup therefore creating further mass confusion.

Lets ask this, can you have your high beams, low beams, fog light, AND the rear fogs on ALL at the same time?
This was the original problem I pointed out way back in the thread to 503C43 before going off on tangents. When I switch my rear fogs on (second pull on switch), it disables the foglights in the headlight and turns on my apron fogs as well. Another forum member's C36 did the same thing. The manual states first pull is fogs, second is rear fogs. I assume this means BOTH cannot be on at the same time? My W124 worked the same way my C36 does. WAYYY back in the thread 503C43 said his does not function like this all this other stuff was brought up after the fact and was dissimilar to my setup therefore creating further mass confusion.
Last edited by 503C43 ////AMG; Jul 2, 2010 at 05:35 PM.






