Author Topic: Euro fog lights dead  (Read 1817 times)

raueda1

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Euro fog lights dead
« on: 20 August 2021, 05:10 AM »
Per title.  I'm not sure if they ever worked since I got the car.  Regardless, it would be nice if they did.  I'm on the road 2600 miles from home, no tools or test equipment (brave or just foolish?).  :o
The fuse is ok.  Anything easy that I can do?  Thanks And cheers....
-Dave
Now:  '76 6.9 Euro
Before that:  1966 230S, 1964 220SE coupe, 1977 Carrera 3.0

Max-NL

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Re: Euro fog lights dead
« Reply #1 on: 20 August 2021, 06:31 AM »
Honestly not really. If I look at the wiring diagram (https://cdn.w116.org/tech/elektr_diagram.pdf) it seems that it goes from fuse 9 directly to the lightswitch and then to the lightbulb. You could try and see if fuse 9 gets power via a bulb and some wires.
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daantjie

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Re: Euro fog lights dead
« Reply #2 on: 20 August 2021, 09:11 AM »
Maybe the light switch?
Daniel
1977 450 SEL 6.9 - Astralsilber

Randys01

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Re: Euro fog lights dead
« Reply #3 on: 21 August 2021, 08:48 PM »
both globes?

mrkozzy

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Re: Euro fog lights dead
« Reply #4 on: 22 August 2021, 12:20 AM »
 Just to clarify

These are the ones incorporated into the headlight assembly yes?

Or the separate ones usually tucked under the bumper? (often yellow in color)

MrKozzy

raueda1

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Re: Euro fog lights dead
« Reply #5 on: 22 August 2021, 04:13 AM »
Just to clarify

These are the ones incorporated into the headlight assembly yes?

Or the separate ones usually tucked under the bumper? (often yellow in color)
Yes, integrated. 
-Dave
Now:  '76 6.9 Euro
Before that:  1966 230S, 1964 220SE coupe, 1977 Carrera 3.0

mrkozzy

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Re: Euro fog lights dead
« Reply #6 on: 22 August 2021, 02:55 PM »
So when you pull the light switch "out" to activate the fog lights is your rear fog light not working either? 
This single rear  light is incorporated into the rear light assembly and is only on the drivers side.
« Last Edit: 22 August 2021, 03:06 PM by mrkozzy »
MrKozzy

raueda1

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Re: Euro fog lights dead
« Reply #7 on: 28 August 2021, 07:14 PM »
So when you pull the light switch "out" to activate the fog lights is your rear fog light not working either? 
This single rear  light is incorporated into the rear light assembly and is only on the drivers side.
Huh. I don't think  so.  Nothing on the rear lights up when fogs are switched on.  Which lenses would those even be?  The backup lights?
-Dave
Now:  '76 6.9 Euro
Before that:  1966 230S, 1964 220SE coupe, 1977 Carrera 3.0

Nabstud

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Re: Euro fog lights dead
« Reply #8 on: 29 August 2021, 06:06 AM »
Just a thought, they only work when the park lights are on. Are you turning them light switch to the first notch??
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UTn_boy

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Re: Euro fog lights dead
« Reply #9 on: 29 August 2021, 04:17 PM »
So when you pull the light switch "out" to activate the fog lights is your rear fog light not working either? 
This single rear  light is incorporated into the rear light assembly and is only on the drivers side.
Huh. I don't think  so.  Nothing on the rear lights up when fogs are switched on.  Which lenses would those even be?  The backup lights?

Bear in mind that there are two "pull out" accessory positions on the headlight switch.  The first notch is for the front fog lights, while the second notch is for the rear fog light. 

The rear fog light is the inner most lens of the left tail light lens assembly.  (closest to the trunk lid button).  The rear fog lamp is only in the left tail light.  They did not have fog lights in both lights for safety reasons. 
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raueda1

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Re: Euro fog lights dead
« Reply #10 on: 30 August 2021, 01:18 PM »
So when you pull the light switch "out" to activate the fog lights is your rear fog light not working either? 
This single rear  light is incorporated into the rear light assembly and is only on the drivers side.
Huh. I don't think  so.  Nothing on the rear lights up when fogs are switched on.  Which lenses would those even be?  The backup lights?

Bear in mind that there are two "pull out" accessory positions on the headlight switch.  The first notch is for the front fog lights, while the second notch is for the rear fog light. 

The rear fog light is the inner most lens of the left tail light lens assembly.  (closest to the trunk lid button).  The rear fog lamp is only in the left tail light.  They did not have fog lights in both lights for safety reasons.
You and Nabstud were, as always, 100% correct.  Fog lights do indeed work when pulled out in the first position.  I still don't see anything in the back though. I suspect that the fixtures aren't original, or maybe USA versions when car was imported.  I don't care about the rear anyway.  Another mystery solved.  Thanks and cheers,
-Dave
Now:  '76 6.9 Euro
Before that:  1966 230S, 1964 220SE coupe, 1977 Carrera 3.0

UTn_boy

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Re: Euro fog lights dead
« Reply #11 on: 30 August 2021, 04:56 PM »
So when you pull the light switch "out" to activate the fog lights is your rear fog light not working either? 
This single rear  light is incorporated into the rear light assembly and is only on the drivers side.
Huh. I don't think  so.  Nothing on the rear lights up when fogs are switched on.  Which lenses would those even be?  The backup lights?

Bear in mind that there are two "pull out" accessory positions on the headlight switch.  The first notch is for the front fog lights, while the second notch is for the rear fog light. 

The rear fog light is the inner most lens of the left tail light lens assembly.  (closest to the trunk lid button).  The rear fog lamp is only in the left tail light.  They did not have fog lights in both lights for safety reasons.
You and Nabstud were, as always, 100% correct.  Fog lights do indeed work when pulled out in the first position.  I still don't see anything in the back though. I suspect that the fixtures aren't original, or maybe USA versions when car was imported.  I don't care about the rear anyway.  Another mystery solved.  Thanks and cheers,

If the turn signal lens part of the tail light lenses are half orange and half red, then they're U.S. tail light lenses.  If the turn signal part of the lens is all orange, then it's  European tail light lens.   
1966 250se coupe`, black/dark green leather
1970 600 midnight blue/parchment leather
1971 300sel 6.3, papyrus white/dark red leather
1971 280sel Black/black leather
1973 300sel 4.5, silver blue metallic/blue leather
1976 280s astral silver/blue MB Tex

mrkozzy

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Re: Euro fog lights dead
« Reply #12 on: 31 August 2021, 01:31 AM »
Thought I'd add some pics to clarify, (at least the downunder euro set up.)

In both cases I pulled my lights switch control button "out" and "clockwise". 

1st picture is front fog lights ON together with headlights. Fog lights can be ON by themselves if you desire.

2nd picture is the rear fog light ON. Note how its only on one side., Always the drivers side depending whether you are left or right hand drive. 
MrKozzy

Nabstud

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Re: Euro fog lights dead
« Reply #13 on: 28 September 2021, 06:20 AM »
Just to add to the confusion, I checked mine on the weekend, they work a bit different to MrKozzy's car. Fog lights only operate when park lights are on, as soon as the headlights are turned on the fog lights turn off. I can't have headlights and fog lights on together as in MrKozzy's pic.
1975 280S - Australian delivered

raueda1

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Re: Euro fog lights dead
« Reply #14 on: 28 September 2021, 07:40 AM »
Just to add to the confusion, I checked mine on the weekend, they work a bit different to MrKozzy's car. Fog lights only operate when park lights are on, as soon as the headlights are turned on the fog lights turn off. I can't have headlights and fog lights on together as in MrKozzy's pic.
Yeah, me too.
-Dave
Now:  '76 6.9 Euro
Before that:  1966 230S, 1964 220SE coupe, 1977 Carrera 3.0