SL-Class (R230) 2003 -- 2012: Discussion on the SL500, SL550, SL600

SL/R230: Instrument cluster

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Old Jul 5, 2019 | 08:23 PM
  #1  
Bwollen's Avatar
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From: Olympai Washington
SL63 ANG Acura MDX
Angry Instrument cluster

Is there a way to make the instrument cluster brighter? I have it turned all the way up for night driving but can't read it very well during day light.
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Old Jul 5, 2019 | 08:41 PM
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FxFormat's Avatar
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From: Northern VA
SL 600
I had the same issue with dim clusters, you gotta clean out the sensors on the windshield maybe, the car thinks it's nighttime all the time and dim the gauges.
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Old Jul 6, 2019 | 06:36 PM
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From: Olympai Washington
SL63 ANG Acura MDX
Where are the sensors on a 2004 SL55? If your are referring to the ones behind the mirror how does one clean those?
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Old Jul 7, 2019 | 03:08 PM
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2005 R 230 SL350 (M112 3.7). Sold the 1966 W113 230SL recently
By cleaning the windshield!
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Old Aug 15, 2019 | 11:25 PM
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SL550
Hi, I've been having this issue with my 2007 The windshield was recently replaced. Everything else associated with the windshield sensor module (intermittent wipers, auto headlights) work fine. Today, while sitting at a red light, I reached to see if the adjustment knob was turned all the way up.... and as my hand approached the knob, the cluster displays got bright! Move my hand back, dim. Move it close, bright. moving my hand around, it seems the change occurs only when my hand is near the rest/dimmer knob. No change to the sunlight on the windshield during all this. Does anyone know for sure if the auto dimmer is linked to the windshield sensor, or does it have its own sensor? Any input welcome!

Last edited by tydriver; Aug 16, 2019 at 06:45 AM.
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Old Aug 16, 2019 | 12:23 PM
  #6  
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There is a light sensor on the COMAND unit. Maybe light is reflecting off of your arm onto it?
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Old Aug 16, 2019 | 05:18 PM
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SL550
Maybe. I'll try it 'lefty' on the way home today. If it still does it, I'm taking the cluster apart this weekend to investigate.
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Old Aug 17, 2019 | 12:17 PM
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From: Dallas, TX
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OK, so I do believe the change in brightness is due to sunlight reflecting off the back of my hand, but it is reflecting into the cluster,not the Comand. I found this phot. and I think the sensor is directly above the reset/dimmer control:
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Old Feb 27, 2023 | 02:15 PM
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sl500 r230
I know this is an older thread, but did you ever get this resolved? I have the same issue/s: instrument lights always dim and hardly readable, and "Light Sensor Drive to Workshop" error message.
Of the two, the dim panel is most important to me.
Thanks.
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