The light only turn os when you pusch the button on the bottom side. The light turns on when the fog lights in the front are on and the rear fog light built into the light assemblly.

I have and ML430 and have the same thing, and had them wire the my first set of auxillary lights into the rear lights. As soon as I get my grille guard from Manik, I am going to added a second set which will be wired to the front switch (the top side of the button.)

Its an MB thing. Even my 190E and other 300E have the same thing, the light on the light switch doesn't turn on unless you have on the rear fog light setting, which turns on the built in amber ones as well.

Hope this helps.

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Chirag (Charlie) Patel

- 99 Mercedes-Benx ML 430 V8 w/custom TV, Video, UHF, speaker system
- 93 190E 2.6 (4-sale) w/ an amp, equalizer, and CD-changer, integrated w. stock stereo for integrated cellular phone speaker system
- had a 93 190E m103 3.2, 5-speed trans,
- had a 88 300E 2.6
- had a 84 300TD w/275k+ miles
- 2001 C-Class - Maybe (if 190E sells)