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Topic: Which antenna to wire into? Reply to Thread
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  Topic Review (Newest First)
06-20-2019 11:33 PM
Dave2302 Hi,

Blue wire with Black trace is the Wake Up + ve

Brown Wire colour is Earth (- ve)

I would remove the left Seat, Back Seat Squab and Sill trims, now "cable tie" to existing Wiring until out of the Trunk and into the Cabin at Back Seat Squab area.
Then remove front Carpet, remove Centre Console, lift up the rear Carpet and run it through the plastic cable trunking under the Carpets until it is up at Centre Console area where you need it

That is the correct way to do it.

Some others will likely chime in here that they just stuff it / tuck it under the Carpets, that is NOT the correct way to do the job
Mercedes put all their wiring in the Trunking, it protects it, do it right, do it once is my motto / advice

HTH, Cheers Dave
06-20-2019 02:22 PM
Huachipato I followed the battery power cable to the front. It takes you under the back seat (remove back seat), under the carpet of the passenger seat and up the side of the center console. I did the wiring for the Android head unit and it was kind of a pain to work around the passenger seat (I didn't see how to remove a steal cable that was attached to it so I just rocked it back and forth to get cables under it). I'm sure you might be able to go up the driver side as well.
06-20-2019 11:06 AM

Thanks Dave, Will write it up and post it as a new thread.
As for the electric, the blue black to CD changer will be my positive and I find ground elsewhere right or is it a BLUE for + and BLACK for -?
Any advise on how to route this cable to the cabin?
06-19-2019 11:15 PM
Dave2302 Hi,

Glad you've sorted it, a pictorial write up would be good, I looked for similar in our Encyclopaedia and couldn't find it, so if you do a new thread I will put it in the Encyclopaedia for you

For your power, if it is very low amps like under 1A it will probably be fine hooked into the Blue / Black Wake Up wire that goes to stuff like CD Changer, Amplifier etc

06-19-2019 10:00 PM
Kskanna Done. I hope this is a good solution to those who are stuck with this specific problem.
Thanks to your input I was able to finish the antenna wiring and get quality audio auxillary input into the command unit.
Steps for creating an aux input into the 2005 and later w220 using a powered FM modulator are quite simple.
The only additional parts required are an antenna adapter kit. That's linked in this thread.
Remove the black antenna from the audio gateway and plugged the little box in and tuned my radio to the specified fm frequency.
From here I hope to run the aux cord into the cabin somewhere close to the ashtray in the center console.
For now I just plugged into the power for the audio gateway but I'm sure I can find a better power source.
I would like suggestions for the following:
1. Best source for power in that trunk area which will turn on with the key in.
2. Best route for the cord to run from trunk to near the gear shift.

I hope you guys have followed what I did. Should I do a write up if this?
Here are some photos.

Thanks to all for your consistent help.
06-18-2019 07:44 AM
Huachipato Black one is the one I used for my Android head unit install for FM. It should just be a easy latch to disconnect. I believe the Yellow one is GPS.
06-18-2019 12:10 AM
Dave2302 Hi,

OK, I now understand what you are trying to achieve.

Yes, being a 2005 your Car is a Facelift model, and therefore has the most F/O system which sadly is not the one I am all that familiar with.

Yes there will be a catch on the plugs, don't just yank them out, have a good look and unlatch them.

It would appear from the below link that it is NOT the yellow plug, (Yellow is Navi Antenna) so you need to tap into the other one !!

Have you actually tried using the Forums Google Search Button ?

In under a minute I came up with this link, plus there are others, which I do believe tell you what you need to know ...................

06-17-2019 08:34 AM
Kskanna Hello Dave. I'm sorry that what I'm trying to do is so confusing. Let me try again.

This is a 2005 w220. So it has MOST and not d2b. It's got a command with no means of putting in an aux input. Now if I'm already wrong in this statement, Correct me and set me on the right track.

(Only option I've seen is: NAV-TV kit 0002 that's supposed to take away CD changer and provide the aux in. Looks complex and I've not seen a single post that shows it's worked.)

Using an FM modulator is the easiest way to get an aux input but the wireless devices are not good simply because of the heavy FM use in my area, San Francisco. There is a better fm modulator and that's the one that's hard wired into the radio. There's no splicing involved as I have adapters that convert the antenna in that goes into the AGW to regular and the antenna out that comes out of the modulator into the Mercedes pin that'll fit the AGW.

Technically if I connect this correctly I should interrupt nothing. If something stops working, I just undo what I did.

Dave since you've worked so much on these cars can you answer me this:

1. In the audio gateway where is the antenna input?

2. When that's disconnected what happens?

3. How does it disconnect (where is the tab)?

Thank you
06-17-2019 12:30 AM
Dave2302 Hi,

I don't think it is a lack of interest, I just think that not many folks really understand these systems.

I have a reasonable to good understanding having done several Android Installs, but I am struggling to comprehend exactly what it is you are trying to fix / achieve

If you have a problem with your Antennae, then fix it using MB Parts.

If you want to use your phone by a Bluetooth puck

If you want to play Music digitally, either install the "Aux In Kit" from Mercedes or fit an Android and use a TF Card in it.

If you want to install Android then use one of the proprietary adaptors that you have linked.

As @Ex-Fed said earlier Chinese Electronics seldom plays well with Mercedes F/O Audio equipment.

Still but HTH,
06-16-2019 06:24 PM
Kskanna Photo update. I have attached a photo. I finally figured out I'm looking at the wrong side of my AGW. The photo shows 2 antenna connections. One black other yellow. Any comments on which is in and which is out? Also do they pull out? Is there a tab to press?
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