How to turn foglights on with headlights in "auto"?
the main issue here is I like the fog lights on when i enter parking garages (which I do everyday). the fog lights provide light on the "sides" -- anyway, to have to turn the fog lights "on" every morning and every evening to and from the office is terribly annoying. auto lights are a godsend, and having them turn on with the fog lights shouldn't be crippled!
i think the 1 at a time thing while cornering is only with the p2 package.
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BTW, i HATE low-cornering fog lights; it looks like you have a burnt light.
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2) I also would like to have the fogs turn on when the headlamps turn on in "AUTO" mode...
However, this user wanted to use them in a parking garage, which sounds like a good idea.
I just don't think you can do this without going to on and pulling it out.


the main issue here is I like the fog lights on when i enter parking garages (which I do everyday). the fog lights provide light on the "sides" -- anyway, to have to turn the fog lights "on" every morning and every evening to and from the office is terribly annoying. auto lights are a godsend, and having them turn on with the fog lights shouldn't be crippled!
i think the 1 at a time thing while cornering is only with the p2 package.
In a prior car I did something similar by running a hot wire from the one of the parking light wires to the relay that controls the foglights. You might be able to do something similar. Not sure where the fog lights relay is on the C-Class though.
Is your point "hey it's really easy just turn it on and off everytime" - ? Cause that's not the point either.
Glad you contributed though!
BTW, i HATE low-cornering fog lights; it looks like you have a burnt light.
the "cornering" foglight is just a cheap way of making the projector like the BMW and Lexus that turns when you turn the steering wheel.
the W204 has stupid features.
without the headlight switch on "auto" mode. the security/locator lights doesn't delay shut-off or turn-on when you unlock the door. with the switch on "auto" you can't turn your fog light on and with the "auto" on it does that stupid cornering light thing.
Last edited by FrankW; Sep 26, 2008 at 05:31 AM.
I always thought there was something wrong with my fog lights. In fact, the non-Mercedes dealership that sold me the car changed both fog lamp bulbs because they believed one of them was burnt. Whatever Mercedes was thinking, there is only one conclusion from any observer of a single lit fog lamp- the other one must be burnt. Now that I know it is by design, I think it is weird.
Since this issue was discussed in 2008, I wonder of anyone has a found an easy workaround to make both fog lamps come one, or stay off.
The manual:
The cornering lights only function when the headlight switch is set to auto. This is on purpose and by design since the cornering light function is automatic. With the switch in any other position the cornering light function does not work.
The cornering light function can also be added to any vehicle equipped with fog lights by the dealer. I believe they just need to enable option code 619 for it to work.








