E-Class (W124) 1984-1995: E 260, E 300, E 320, E 420, E 500 (Includes CE, T, TD models)

dash light turns on when lights on why??

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Old 11-19-2008, 12:51 AM
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85 euro w124 300d non turbo black on black......coming soon hx35 turbo intercooler
dash light turns on when lights on why??

First what is the dash light that looks like a bulb with lines around it. It only turns on when I turn the head lights on? Any idea?
Old 11-19-2008, 01:01 AM
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1990 300ce 24v I6
its the light out indicator. Check your lights.
Old 11-19-2008, 01:14 AM
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85 euro w124 300d non turbo black on black......coming soon hx35 turbo intercooler
outside lights or inside?
Old 11-19-2008, 01:28 AM
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92 500e, 95 E34 525I Touring
Well if it only comes on when you turn on your headlights, it could be a number of bulbs. Possibly your headlights, but it could be a tail light or any of the console lights that come on when your headlights are on.
Old 11-19-2008, 02:58 AM
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1994 C124 E320 Coupe - 1975 W116 280S
It's for external lights only (or at least only in my experience)

Check the obvious, headlights, tailights, third brake light, turn signals, driving lights (rear ones that stay on when headlights are on), front fogs, rear fog and the one that goes overlooked allllll teh freakinnnnnn time is this one on both sides:



And for future reference, from left to right:
High beams (duh), battery (duh), parking brake (duh), oil level/pressure (duh), coolant level, washer fluid (duh), exterior bulb out, ABS malfunction (duh), SRS malfunction (duh), ASR malfunction (duh, but not on all cars), and the last one is an obvious duh.

Last edited by Chinny4290; 11-19-2008 at 03:02 AM.
Old 11-19-2008, 03:21 AM
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1990 300ce 24v I6
I've got to change my 3rd brake light tomorrow as it decided to up and die tonight for some odd reason. Oh well, to Walmart I go in search of bulbs.
Old 11-19-2008, 06:24 AM
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92 500e, 95 E34 525I Touring
Hey Chinney you missed one! The brakepad light.

And you may be correct about the indicator only being for outside lights. It does make plenty of sense.

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Old 11-19-2008, 11:09 AM
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Enzo, my Benzo
Yes, the bulb out indicator is only for outside bulbs. DO check the circled one on that drawing, it's usually that one. If it were a signal light, it would flash double the speed....those are an easy tell.

Also check the third brake light ( need 2 people or back up to a reflective surface.)
Old 11-19-2008, 01:31 PM
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1990 300ce 24v I6
If its dark out, you can see the light leak from around the casing of the third brake light IF it is working. No light leak, no worky. Rear brake light is Sylvania Part Number 7506= 1156 for other number systems.
Old 11-19-2008, 01:59 PM
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Mercedes Benz
Yes, the light out indicator is for outside bulbs only.
-Did you check your licence plate lights at the rear ?
Cheers,
Old 11-19-2008, 06:33 PM
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92 500e, 95 E34 525I Touring
Hopefully its not the 3rd brake light. Those tabs break so easily from years of sun exposure. the retards installing my tint broke them and didnt tell me, and every one Ive seen at the junkyards is wrapped in electrical tape for the same reason.

So be super careful taking it off.
Old 11-20-2008, 02:29 AM
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85 euro w124 300d non turbo black on black......coming soon hx35 turbo intercooler
I found it it was the left turn signal.

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