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E320 Elegance 99" (Arabian Gulf Market), Fathers's 500 SEL 86"
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81 Posts
Discussion Starter #1
Hi there folks,,

This time with this very annoying error "Light Defective" it is really mysterious error with my babe.

I tried hard to fix it but nothing to do, last time I went to a good workshop they have something smiler to the "computer checking device used in the dealer" so they checked everything they said that there mayeb some problem with left headlight, after switching the key to position "2" without switching the engine on, All the light inside and outside the car are working fine, headlight, brakes, signals,...everything and without any error.
but as soon as we turned the engine ON, we see the "Light defective" thing comes back!!!

even when I clear it by "pressing the (R)" button it will come back as soon as I change from "Full mode headlight" to "dam mode" or whatever I mean semi-full , by the way I have a xenon headlight on my babe "works only on semi-full mode" comes along with it originally from the factory.

So at the end they said it is maybe the left headlight motor have some problems, which is very costly to change I think specially when u don't notice any changes at all in the REAL duty of my car.

Thanks please help me. Is all that is right? do I have to change my left headlight's motor?to fix this annoying "Light defective" error..
 

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E320 Elegance 99" (Arabian Gulf Market), Fathers's 500 SEL 86"
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81 Posts
Discussion Starter #3
acarter53 said:
I have a dumb Q for you. Are both front marker lights working?
Hi there,, thanks for ur reply,

but I didn't get what do u mean by "Front Marker Light"? do you mean those light which keep all the stuff behind the wheel "Speedometer, Temp, ,,.." readable? or what?

,,,
 

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2001 E320 - Brilliant Silver/Ash: 107,000+
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17,193 Posts
Front marker light

cruel_storm said:
Hi there,, thanks for ur reply, but I didn't get what do u mean by "Front Marker Light"? do you mean those light which keep all the stuff behind the wheel "Speedometer, Temp, ,,.." readable? or what?,,,
I think he means the little lights between the headlights and the front wheels. We have those in the USA, maybe you don't (?)
 

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2012 C300 Sport 4Matic and 2003 CLK430 Cabrio
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1,919 Posts
cruel_storm said:
Hi there,, thanks for ur reply,

but I didn't get what do u mean by "Front Marker Light"? do you mean those light which keep all the stuff behind the wheel "Speedometer, Temp, ,,.." readable? or what?

,,,
Sorry I did not see that you were not in the USA.
 

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2004 Mercedes S350L, 1999 Mercedes E55 AMG, 1997 Mercedes SLK230, 1992 Mercedes 300SE (sold)
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236 Posts
Check the rear brake lights. I was unable to identify which light was gone for months when I had the "Lamp Defective" message on my 1999 E55 AMG. Until one day, I was pulled over by a police car and got warned. I took it to the mechanic and found out it was the lamp fitting that was wrong. Replaced that and the annoying message went away. Good luck!

Cheers,
Adam
 

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2013 VW Golf Sportwagen TDI, 2011 Mazda 2, 2000 E320 4Matic Wagon (retired),1994 C280 (retired)
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3,488 Posts
Check the lights over your rear licence plate as well. I had the light defective warning in my C280 and couldn't find the light that was out until someone suggested the licence plate lights.
 

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1959 220S cabriolet, 1983 240D original owner, 1999 E300 turbo diesel, 1988 560SL, 2003 SLK320
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3,513 Posts
I don't think the climate control illumination is part of that error message. I believe it is only exterior lighting.

Len
 

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E320 Elegance 99" (Arabian Gulf Market), Fathers's 500 SEL 86"
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81 Posts
Discussion Starter #10
thanks all for the help,
but I have already checked rear plate lights and chnged one it still the same, dunno why??
any other new advice
 
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