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Fog Lights?

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Old Mar 26, 2004 | 11:09 AM
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me: 2015 SL400 & 2015 ML400; wife: 2022 GLC Coupe; daughter: 2017 GLC SUV
Fog Lights?

My manual says to pull headlight switch out one detent for front fogs, two detents for rear fogs. I've walked around the car and can't tell any difference, front or rear, fogs on, fogs off? are they optional or something?
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Old Mar 26, 2004 | 05:53 PM
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2005 SLK 55
This is how it works on my SLK...

On my SLK, I turn the switch for the lights clockwise to the end. When you pull out to one detent, the front fogs come on. When you pull our to the second, the front fogs stay on and the left rear lamp becomes brighter.
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Old Mar 26, 2004 | 06:34 PM
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02 W163, 84 W123, 03 E39, 98 E39
Fog Lights

You need to have either your parking lights or head lights on for the fog lights to work.

If your front fog lights and your one rear fog light on the left aren't working, then possibly your bulbs are burnt out.
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Old Mar 27, 2004 | 10:13 AM
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'05 A4 1.8TQM6
Re: Fog Lights?

Originally posted by eddieo45
My manual says to pull headlight switch out one detent for front fogs, two detents for rear fogs. I've walked around the car and can't tell any difference, front or rear, fogs on, fogs off? are they optional or something?
Ok, if you look at your headlights straight on, you should notice next to the grill on each side, there's a seperate chamber inside there. Thats your fog lights.

Now turn on the headlights, you'll see what i'm talking about, there will be space there that is not lighted up.

Go back and pull the headlight knob out once and take a look again. That empty lens space should be filled with light now.

If you walk around back, take a look at the tail lights. They'll be glowing their normal red color.

Go back and pull the knob out once more, you should see a "amber/orange" light lit up in the middle of the knob.

Walk back there and take a look. You should see a spot on the left (i'm pretty sure it's on the left side) that is noticibly brighter RED than the rest of the red light surrounding it. Thats your rear fog.

You can drive with the front fogs on, doesn't matter. But only turn on the rear fog if your in dense thick fog because sometimes the po-po will think something is wrong with your tailight and may pull you over

Report back with your findings
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Old Mar 27, 2004 | 10:14 AM
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'05 A4 1.8TQM6
Re: Fog Lights

Originally posted by sph17
You need to have either your parking lights or head lights on for the fog lights to work.

If your front fog lights and your one rear fog light on the left aren't working, then possibly your bulbs are burnt out.
Yeah, my front left fog is still burnt out...i'm going to get that darn thing out today!
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