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My newly arrived US CLA 250 premium, multimedia, non sport package but with xenons, has a dash switch and "on" display icon when switched on, but I can't find nor see any front fog lights, on or off! The rear fog light is working, however.
Are mine alone not functioning? Do all the rest of you guys have them and work?
 

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That's a good question. I hit the button and I see the fog light indicator on the dash go on but I can't tell the difference.
 

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you can't see any changes from outside and having someone else hit the button? maybe it's built into the headlight? I haven't played with the cla much so I can't say for sure but my 911's foglight was built into the headlight so when I hit the fogs the lower portion of the headlight lights up
 

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OK, I found it and it's quite lame. I don't know if it's the same for non-Xenon/LED tail light models but on mine when you push the fog light button a little red light on the driver side tail light comes on. It's just to the right of the back-up light. It is not on the passenger side tail light. I don't know what purpose that serves or how it is called a fog light. At the front pushing the fog light button just turns on the headlights. I can't tell the difference between turning them on this way or just simply switching the headlight on using the light switch.
 

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OK, I found it and it's quite lame. I don't know if it's the same for non-Xenon/LED tail light models but on mine when you push the fog light button a little red light on the driver side tail light comes on. It's just to the right of the back-up light. It is not on the passenger side tail light. I don't know what purpose that serves or how it is called a fog light. At the front pushing the fog light button just turns on the headlights. I can't tell the difference between turning them on this way or just simply switching the headlight on using the light switch.
I guessing this is for either..

1. rear fog, as mention above the foggy situations in Europe, many European cars have rear fogs so help other cars see them in dense fog so they don't get rear ended

or

2. on my older w140 I remember there was an option when you park the car on the side of the street you can put your turn signal "on" as in it's left like you're going to turn right or left, and when the car is off a light will light up on the rear of your car, this is for when cars are parked in narrow streets in Europe and at night to keep people driving by from hitting your car, I don't know if this feature is on newer cars though
 

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2. on my older w140 I remember there was an option when you park the car on the side of the street you can put your turn signal "on" as in it's left like you're going to turn right or left, and when the car is off a light will light up on the rear of your car, this is for when cars are parked in narrow streets in Europe and at night to keep people driving by from hitting your car, I don't know if this feature is on newer cars though
There's a different switch for that feature and I've tested it. If you turn the light switch all the way to the left then the driver side rear "parking" light comes on. Turn it one click to the right and the passenger side rear light comes on. This is independent of the fog light. I'm guessing you didn't get your CLA yet.
 

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If you have ever been on I-80 in NE Pennsylvania in the fog or have seen the 20 and 30 car pile ups that occur in areas of dense fog, you would appreciate having the rear fog light.

Multiple-vehicle collision - Wikipedia, the free encyclopedia
I drive I-80 every day to and from work but in NJ but I know about I-80 in PA. I just don't see how that little red light in the driver side tail light is very visible by anyone in the fog. Maybe I'm wrong.
 

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turn it on and get down to the level as if youre in another car. then report back. its very useful. think about it, when was the last time benz put something on their car that wasnt needed.
 

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Discussion Starter #12
It's the front fog lights that are "missing'. Even my dealer is perplexed and is trying to get a hold of a factory rep to get the answer.
 

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That's just for the rear of the car, it makes it safer in tough conditions. Some cars tend to have the fog lights integrated in the main lamps but this is not true for the CLA. I guess it's just a rear-end collision prevention system? hehe
 

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I think rear foglights are more useful than front foglights honestly, assuming people turn them on. A rear foglight will better allow you to see traffic you are approaching versus your foglights shining into the grey looking for a grey car. That said, it won't help you avoid deer (though I can't imagine they have as many deer in Western/Central EU than in the states).
 
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