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2009 c300 sport Check right and left low beam

Old Oct 23, 2023 | 07:38 PM
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2009 c300 sport
2009 c300 sport Check right and left low beam

So all my lights work besides my low beams, high beams and all work but when i go to turn my headlights on they dont come on. The bulbs look good, connection points all looked brand new and spotless. I checked fuses and what not and nothin. Im out of ideas and cant find any solution
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Old Oct 24, 2023 | 01:45 PM
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From: MA Coast
W204 2010 C300 4matic Sport M272
Have you worked on the headlights recently, or the low beams just stop working out of the blue? Is there a warning showing on the dash for bulbs out? What type of bulbs, halogen, xenon? If you have a multimeter you can check the harness going to each bulb for power. Check the fuse for power with multimeter.
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Old Oct 24, 2023 | 02:57 PM
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2009 c300 sport
Originally Posted by TimC300
Have you worked on the headlights recently, or the low beams just stop working out of the blue? Is there a warning showing on the dash for bulbs out? What type of bulbs, halogen, xenon? If you have a multimeter you can check the harness going to each bulb for power. Check the fuse for power with multimeter.
no I have not worked on the headlights on this car, I just bought it like 2 weeks ago. I just realized I been driving with my highs on and not my lows ☠️ I’ll need to go get a new multimeter and check for voltage, I get two warnings when starting car that say “check left and right low beam” and that’s it. And which fuse is the main headlight fuse? I checked on fuses in front SAM and all were perfect. As far as bulbs go I’m not sure which ones are in these, I’m assuming whatever the oem bulbs are, I’m not too savvy with headlights
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Old Oct 24, 2023 | 05:34 PM
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From: MA Coast
W204 2010 C300 4matic Sport M272
The bulbs could be burned out and need replacing. The low beams are the lights on the outside of the housing, the inner bulbs are the high beams. My car has projector type lenses for the low beams and reflector for the high beam.


Drivers headlight, low beam is on the right side.


Check the bulbs. Open the hood and look for the round covers on the back of the headlight housing. The passenger side is easier to check, less stuff in the way.


Remove the round cover counter clockwise and you will see the harness and bulb.


Its easy to tell if the low beams are on and the high beams are on. On the dash the low beams show as the green headlight light. High beams show as blue.






Mine came with regular Halogen H7 bulbs in the lows, highs and fog lights.


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