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Back up camera wiring help w203

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Old 04-10-2016, 01:34 AM
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Back up camera wiring help w203

Hi All;
I own a 2005 c230 Sport Sedan, and trying to wire a wifi back up camera. Need to locate the back up lights wire and another wire for a power source for the wifi transmitter. I do have the Haynes manual for wiring diagram but it's so confusing and doesn't seem to match my wired. I think the reverse lights wire is the yellow-gray wire. What do you all think? Does anyone know what the colors of wires indicate??



Yellow gray are reverse lights? For wifi transmitter, which wire would give constant power?





This is so confusing and doesn't match wire colors?





Old 04-10-2016, 11:14 AM
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Originally Posted by LexBrett2
Hi All;
I own a 2005 c230 Sport Sedan, and trying to wire a wifi back up camera. Need to locate the back up lights wire and another wire for a power source for the wifi transmitter. I do have the Haynes manual for wiring diagram but it's so confusing and doesn't seem to match my wired. I think the reverse lights wire is the yellow-gray wire. What do you all think? Does anyone know what the colors of wires indicate??



Yellow gray are reverse lights? For wifi transmitter, which wire would give constant power?





This is so confusing and doesn't match wire colors?





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Old 04-10-2016, 07:30 PM
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Originally Posted by LexBrett2
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Anyone know what the colors indicate?
Old 04-11-2016, 01:10 PM
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Test for constant power

Originally Posted by LexBrett2
Anyone know what the colors indicate?
Guess I could just use a voltmeter and stick it in each one of the slots in the plug to test for constant power?
Old 09-06-2017, 11:58 PM
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2005 C230 Sport Sedan-6 Speed Manual
Did you ever receive an answer or figure this out? I am preparing to wire my camera and I need the same information.

I'm thinking grey/yellow looks like the one to use.
Old 05-25-2019, 11:01 PM
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Did u guys ever figure this out. I have exact issue.
Old 05-26-2019, 05:54 AM
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I tried fitting a camera to my past Rover 75. The problem connection was not so much the reversing light wire but the reversing wire behind the dash. I never did find it.
Old 05-26-2019, 06:26 AM
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Check out post #6 in this thread: https://mbworld.org/forums/c-class-w...0-revival.html

I used the gray/yellow wire and I posted a picture of the ground.point.
Old 04-17-2020, 07:23 AM
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w203 c230 sport edition
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constante no hay .. solo el negativo es continuo ..lo tendrias que sacar de la fuciblera trasera del lado izquierdo .... ahora si necesitas que la camara prenda cuando pones marcha atras ahi si conectas al faro gris / amarillo
Old 03-15-2021, 12:02 AM
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Sorry to resurrect this post but i have a similar problem. I'm installing a backup camera to my '07 w211, but im confused about reverse lights' positive and negative. Any idea which color to connect?


Old 03-15-2021, 07:07 AM
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On my car, there was a grey/yellow wire that I used for power. There was a ground point on the inside of the fender that I used for ground.
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Old 03-15-2021, 06:54 PM
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Just open up your light and see which one powers up the reverse bulb. One look at the circuit board and you'll have your answer.

You might also want to ask in the W211 forum.

The circuits can handle quite a bit of juice, especially if your car uses P21W bulbs. No power issues. Also no need to find a chassis ground. The ground in the harness will be sufficient.

Last edited by slammer111; 03-15-2021 at 07:04 PM.
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