CLK-Class (W209) 2003 on: CLK 270 CDI, CLK 200K, CLK 200 CGI, CLK 240, CLK 320, CLK 350, CLK 500, CLK 550 [Coupes & Cabriolets]

Instrument cluster backlight

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Old Jul 31, 2023 | 04:15 PM
  #1  
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From: Italy
W209 CLK 270 CDI ELEGANCE 6 gear manual transmission
Instrument cluster backlight

hello guys, my W209 cluster has no backlight, everyting works fine, speedometer, RPM, all gauges, display, clock and also the dimmer for lights.
The only thing that is not worlking is the backlight for clock and for all the gauges.
I know that there is a LED strip for backlight.
There is any DIY guide to fix it?
Any instruction to take the led strip apart ?
in the photo key is on position 2 and light switch is on Auto.
if i move the dimmer only the needle and the LCD become brighter or darker.
there is any fuse to check?
any help will be appreciated

cluster

cluster no light
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Old Jul 31, 2023 | 05:05 PM
  #2  
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2004 CLK 55
following. I have the same issue.
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Old Jul 31, 2023 | 05:43 PM
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From: Italy
W209 CLK 270 CDI ELEGANCE 6 gear manual transmission
I’m not alone, welcome in the club of no cluster backlight 😂

Just joking, I have some news, there is a Mylar strip with LED and it tend to break where it joints on the socket.
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Old Jul 31, 2023 | 05:44 PM
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W209 CLK 270 CDI ELEGANCE 6 gear manual transmission
Originally Posted by K_esco
following. I have the same issue.
your dimmer works ?
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Old Jul 31, 2023 | 07:47 PM
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From: Atlanta, GA
2004 CLK 55
Dimmer works but it's pointless lol. All lights work except back lighting. It worked once for a few mins but then went out again so I think it may be the ribbon for sure.
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Old Aug 1, 2023 | 01:02 AM
  #6  
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From: Italy
W209 CLK 270 CDI ELEGANCE 6 gear manual transmission
You should remove the cluster from your car, open it and look if the Mylar cable is broken, then you will fix it.
open it is easy. There are a lot of video on YT.
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Old Aug 3, 2023 | 01:46 AM
  #7  
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From: Italy
W209 CLK 270 CDI ELEGANCE 6 gear manual transmission
Anyone has a diy guide to fix that ? Please helppp
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Old Aug 4, 2023 | 09:23 AM
  #8  
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From: Italy
W209 CLK 270 CDI ELEGANCE 6 gear manual transmission
hello guys, i fixed my cluster backlight
i take it apart and found on the socket under the Mylar cable the 2 contacts were dirty. I cleaned them with some contact cleaner and i reassembled the cluster and now it works.
i read 2 post on the forum, i will link them:
Post 1
Post 2
on taht 2 link you can find some help.
Here the photo of my cluster

Mylar Cable

socket where backlight connects

see dirt, black stuff

cluster full working
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