GL Class (X164) 2007-2012: GL320CDI, GL420CDI, GL450, GL550

Another Dead Taillight?

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Old Nov 14, 2021 | 09:55 AM
  #1  
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2011 E350 Wagon, 2010 GL450
Another Dead Taillight?

Hey folks,

I noticed yesterday that the right taillight wasn't illuminated after parking the car. I haven't been able to do any proper troubleshooting yet other than seeing the turn signal flash when I locked it, but I'm guessing it's bad and it'll need replacement. The thing is, I just replaced the left taillight! Fortunately they're not outrageously expensive, but it's crazy that both have gone bad now. I've inspected the rear SAM earlier this weekend and it's as dry as it's ever been. I pulled all of the harnesses out and none of them showed any signs of corrosion. I'm also not seeing any other unusual behavior so I don't suspect the SAM is the culprit.

What's everyone else's experience with the taillights? Is it unusual for them to burn out, or did I hit the jackpot?
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Old Nov 14, 2021 | 02:10 PM
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For some reason, they just don't last. I've replaced more rear bulbs on my GL than on all the other cars I've owned combined. Another quirk is that on early GLs, the warning message for them that a bulb is burned out is backwards (right is really left/left is really right).
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Old Nov 14, 2021 | 04:45 PM
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Originally Posted by EWT
For some reason, they just don't last. I've replaced more rear bulbs on my GL than on all the other cars I've owned combined. Another quirk is that on early GLs, the warning message for them that a bulb is burned out is backwards (right is really left/left is really right).
My 2007 seems to get the right side when a bulb burns out.
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Old Nov 14, 2021 | 10:06 PM
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Originally Posted by BlownV8
My 2007 seems to get the right side when a bulb burns out.
Mine does, but I'm not sure how common it is. The service writer at the dealer clued me into it and said something about it being an issue on early units. .
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Old Nov 15, 2021 | 09:19 AM
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From: Sammamish, WA
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Sorry, I should have clarified. I have a 2010 so the taillights are the LED type.
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