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What resistor for OEM LED Sidemarkers and License Plate lights?

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Old Jun 10, 2020 | 11:49 PM
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Lawrence1's Avatar
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2011 G55 + others
What resistor for OEM LED Sidemarkers and License Plate lights?

looking to convert to the 2015+ sidemarker lights and license plate lights on my 2011 car. Anyone know what size resistors are needed to eliminate bulb out errors? I see the aftermarket china made lights come with resistors built in but I would like to stay with genuine MB parts on this. Thanks.
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Old Jun 11, 2020 | 09:35 AM
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The original side marker bulbs are 4 watts so it should require a 40 ohm, 5 watt resistor for these. The license plate lamps are 5 watts so it should require a 30 ohm, 10 watt resistor for these. In reality, you could use the 30 ohm, 10 watt ones for all of them and the SAM won't care.

As I said in my previous post, I have not been able to find these values pre-made for this application, however, if you are handy with a soldering iron and heat shrink, you can easily find the bare resistors on the net and make your own. I converted my previous G to LED using the MB OEM parts (I just sold my extra set of the side lights) and I got the required resistors on Amazon (
Amazon Amazon
)

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Old Jun 11, 2020 | 07:14 PM
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Originally Posted by Floobydust
The original side marker bulbs are 4 watts so it should require a 40 ohm, 5 watt resistor for these. The license plate lamps are 5 watts so it should require a 30 ohm, 10 watt resistor for these. In reality, you could use the 30 ohm, 10 watt ones for all of them and the SAM won't care.

As I said in my previous post, I have not been able to find these values pre-made for this application, however, if you are handy with a soldering iron and heat shrink, you can easily find the bare resistors on the net and make your own. I converted my previous G to LED using the MB OEM parts (I just sold my extra set of the side lights) and I got the required resistors on Amazon (https://www.amazon.com/LM-YN-Wirewou.../dp/B077BQKT16)
great! thank you so much. Can I ask where you mounted the resistors? My understanding is that they get fairly hot so finding a good place to mount them is paramount.
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