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Old 09-16-1999, 11:48 AM
Posts: n/a

The knob that switches on the headlights has an small round orange dot on it. Is that supposed to light up when the fog lamps are turned on when you pull the knob out? I pulled the knob all the way off and didn't see a way to place a bulb in there.


Old 09-16-1999, 12:06 PM
Posts: n/a
My 190E got a buld in the knob...try to
get one fix it.
Good luck
Old 09-16-1999, 09:14 PM
Registered User
Join Date: May 1999
Location: Sacramento, CA
Posts: 1,565
It might depend on which model year you have. Our '87 300E has the orange dot, but it doesn't light up. I think the dot on my mom's '91 lights up, but i can't remember for sure.

Old 09-16-1999, 10:47 PM
Registered User
Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
I believe it is model year dependent. The reason for the orange spot is the knob has been replaced and that is all that is available now.

1987 16V

Old 09-16-1999, 11:36 PM
Posts: n/a
Have someone stand behind the car when you pull the knob out. You may just ahve a rear fog light. I find that these are best used so that people can follow you to tell you that your brake lights are messed up.
Old 09-17-1999, 12:37 AM
Chris Ecklund
Posts: n/a
I see by your profile you have a 1988 300E, on my 1998, the 1st detent is orange for the fog lights, running lights, and the 2nd detent is the back fog light.

Chris Ecklund
98 300 DT
Old 09-17-1999, 04:35 PM
Posts: n/a
The front fog lamps work, I was just curious as to whether or not the orange dot on the know should light up when the fog lights are active. I think Benzmac is correct, the knob may have been replaced.


Old 09-17-1999, 06:38 PM
Posts: n/a
On my 190E, I noticed that the orange light only comes on if I pull the knob out and THEN turn it clockwise to turn on the fog lights.
It doesn't go on if I turn first and then pull.
(regardless, the back fog light doesn't work...just the orange interior light goes on) :-)

You might wanna give that a try though.

84 190E
94 C220
Old 09-17-1999, 08:52 PM
akry's Avatar
W140 Maniac
Join Date: May 1999
Location: Burnaby, BC, Canada
Posts: 960
Actually the orange dot only lights up on when REAR foglight is on. However, it won't light up with just front foglight(since you have '88, your foglights should be yellow, unless replaced).

Or maybe it's model year related like someone mentioned above. However, just a note, my friend's '86 DOES light up. It's all stock, never replaced, Canadian model.....

Happy Motoring.....
Andy Kuo
'92 400SE
71,118 KM

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