Need help with rear view camera

My car is a 2008 with multimedia package and ever since i got the car i havent updated anything from the dealer anyone know why the back rear camera setting isnt coming up?
Last edited by mmike; Aug 12, 2011 at 12:34 AM.
Then you must power OFF the Comand unit for two or three minutes at least. Then start the Comand unit and navigate to SYSTEM and tick the "Active Rear Camera when rear gear is selected".
Hope this help.
Last edited by rognac; Aug 12, 2011 at 10:41 AM.
It could be another kind of problem. Try to put the rear gear with the key in position 2 without the motor running. Then try it again whit the motor running. If the flickering appears when you have the motor running, the solution is easy, you must use a relay to power your camera.
Hope this helps.
Last edited by rognac; Aug 12, 2011 at 06:17 PM.
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From member King_Neptune
From member King_Neptune
http://mercedes-benz.forumactif.com/...amera-de-recul
There is a drawing of what you need to do, it's really easy to do.
http://mercedes-benz.forumactif.com/...amera-de-recul
There is a drawing of what you need to do, it's really easy to do.
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Or here you can see the schema :
http://www.servimg.com/image_preview...354&u=13698079

Later I noticed that I don't need FARKA cable. I think FARKA is basically an SMB connector with some locking feature around it. I got a right-angle SMB cable and it fit in perfectly, not loose at all.

It could be another kind of problem. Try to put the rear gear with the key in position 2 without the motor running. Then try it again whit the motor running. If the flickering appears when you have the motor running, the solution is easy, you must use a relay to power your camera.
Hope this helps.
First I had it on 12V which is the environment sensing circuit. In dark garage, 12V comes on; when I backed out of garage in daytime, 12V disappeared and 7" screen became black. When I still had 12V on, I randomly had the above flicker/rolling lines. I tried a big cap across the power, no help.
Changed it to 12V socket power from the trunk fuse box, fuse 71 or 73 not sure. Perfect. Never had any lines. I don't need any diode and cap.
Last edited by C300CA; Sep 15, 2011 at 11:29 AM.


Or here you can see the schema :
http://www.servimg.com/image_preview...354&u=13698079
Last edited by C300CA; Sep 15, 2011 at 11:39 AM.
And for a plug for our company of course- guys, please post your results when the low end camera fails, or fails to perform at a particular temperature, or can't be seen at night... so others will understand why you should always get a better quality CCD camera. BUT, if one of you guys ever finds a camera that:
1. operates for at least 4 years with no trouble.
2. operates at all temps from 0 degrees F to 130 degrees F
3. operates at night without the ugly ring of IR led around the lens
4. is as small as a dime
5. has a glass lens (very important, as the plastic lens clouds with abrasion and chemicals)
PLEASE let us know a link so that we can test it in a weatherometer ourselves!
On the forum that I put the link, a guy whose job is electronics check the signal comming from rear +12V, ie when you put rear gift, and it goes from -12V to +12V, at 100Hz frequency, as a square signal (I don't know exact english term). So a simple electronic assembly with a diode and capacitor is enough to have a constant +12V signal.
That's what I did on mine, and signal is perfect when engine is running. For older W204, it seems this is not needed.

Yes, it must be something else, NOT at the +12V socket. I don't have a scope at home but just a cheap multi meter, set at DC Volt and it reads +12V. If square wave, DC Volt will read zero, AC Volt will read something.
I really wish the entire schematic is available. Right now I used one of the +12V accessory power from the right side trunk fuse box, no diode no cap no 100Hz filter nothing. Camera works perfectly so far, well only a few weeks but enough to say that is a solid +12V power for the camera.
Another way to check: Set meter to AC Volt and measure the power. If it reads zero then it's a pure DC 12V. If it reads some voltage say 3V, then it's not a pure DC; could be pure AC or an offset AC...
Sorry too long.



