The Impossible Fix 2010 Glk 350 Tail-Light
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GLK 350
The Impossible Fix 2010 Glk 350 Tail-Light
Back right tail light will not turn on. I have ordered andreturned three Bulb Carriers and everyone had the same issue the bottom back rightlight will not turn on.So I switchedthe left bulb holder to the right one and all the lights came on, so I ruledour wiring and SAM issues. Mercedes tried the other returned bulb holders and theyall worked on other models. I am completelylost, and have no idea how to fix this problem. Please Help!
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Joined: Feb 2016
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From: Canada
'06 E55 / '10 GLK 350
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Joined: May 2016
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GLK 350
I thought I pinpointed the issue to the Holder, but now we have ordered three different bulb holders from MB and they still don't work. Each holder was tested on both passenger and drivers side connections and the results were the same. The main break light bulb will not turn on...
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Joined: May 2016
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GLK 350
Swapped Multiple Bulbs, and multiple bulb holders.. The only thing I could see out of the ordinary is that I used a test LED bulb and it faintly illuminated. To me this seems like a Sam issue, but why would the other driver side( Bulb holder) when switched all lights came on.. I’m lost I’ve spent12+ hours trying to find resolution.
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Joined: Aug 2011
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From: Philly area
350 GLK, C280
Did you look at the connector on the end of the cable in the car? The wire for the lower tail light might have been inserted into the point where the fog light is on the left side. Since there is no fog light on the right side that location does not connect to the bulb socket for a right side bulb holder. When you plug the left side holder in, what you actually saw was the fog light turning on for the lower stop light. Examine the vehicle connector very closely for the actual wire location. If there is an empty point that is probably where the connection is suppose to be. You can remove the pin and move it or just jumper the connection point in the bulb holder to it or any other brake light .
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Glk350
I found this old thread while google searching for this same issue. I have been frustrated with this exact problem for months. My fix was to replace the small sidemarker bulbs (194) type. The sidemarker bulb worked but was sending a signal to the SAM, which caused the SAM to trip the lower bulb into brake only mode. I tried carriers, bulbs, swapping, etc, but the only thing that worked was changing all sidemarkers to new and restarting the car! Do not use LED or the SAM will read the wrong resistance and not light the brake bulb.
Last edited by Bavariane46; Jan 8, 2019 at 12:37 AM.
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Joined: Aug 2024
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From: Seattle
GLK350
the dreaded 194 bulb.. who would think.. my lower big bulb now works.. thank you Bavariane46 for your post... Kenan
