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  #1  
Old 01-19-2004, 10:01 AM
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Join Date: Feb 2001
Location: Northumberland, UK
Posts: 1,294
R129 dashboard illumination question

In between the centre air vents on the R129 are two little buttons, one with a red square on it and one with a blue square on it. Press the red square button and the centre vents blow warm air; a little red LED illuminates in the button. Press the blue square button and the centre vents blow cool air; a little red LED illuminates in the button.

Now my question:

At night, with the headlights switched on, the red square in the button is illuminated (whether or not the warm air is switched on). Should the blue square in the other button also be illuminated? On my car it is not, only the red square lights up. The LEDs in both buttons work correctly, it is the blue square itself I am wondering about. Should the blue square be illuminated with the other dashboard illumination?

TIA

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JJ Rodger
2013 G350 Bluetec
1999 SL 500
1993 E300 diesel T
1990 190
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  #2  
Old 01-19-2004, 02:23 PM
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On mine the red LED's are off untill I press the buttons. no matter if the headlights are on or off.

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CR


97 SL600
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  #3  
Old 01-19-2004, 03:29 PM
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Join Date: Mar 1999
Location: phoenix, az
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yes both the red square and blue square are lighted. the colored square light only when the instrument lights are on
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  #4  
Old 01-19-2004, 04:24 PM
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Just checked,

both red and blue sqaures are lit when lights are on.

LED's off untill buttons are pressed.

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CR
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  #5  
Old 01-20-2004, 04:33 AM
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Join Date: Feb 2001
Location: Northumberland, UK
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Thanks guys!

Mine obviously needs a new bulb or something because the blue square never lights up. I'm fixing all of the trivial (and not so trivial) faults before the warranty expires!

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2013 G350 Bluetec
1999 SL 500
1993 E300 diesel T
1990 190
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