Mar 24 2017
How to Check If My Mercedes-Benz C W204 Has AUX?
Mercedes-Benz C-Class W204 from year 2007 to 2014 including models C220, C180, C200, C300, C250, C350, C230, C63 AMG. If your Mercedes W204 comes with original 5 inch small screen without navigation system in the dashboard and want to upgrade it with a large 8 inch screen aftermarket navigation Mercedes W204 Android head unit, you need to find out if your W204 has AUX function or not.
So how to check if my Mercedes-Benz C W204 has AUX?
Firstly a 3.5mm AUX jack is usually located in the glove box at the front of the passenger’s side. You can check if your car has one there:
If yes, you can connect it with your phone via a aux cable, and see if the music sound from your phone comes out from car speakers.
Secondly, please check if you are able to turn to AUX mode from factory menus, just follow below steps:
- whiling playing a CD from your menu, use your control knob to select CD, then press the knob to enter.
- Use your control knob to turn to Aux as the below pic, press the knob to turn to Aux mode
Tip: If you have ipod plugged in, ipod turns off the Aux option(iPod and Aux functions go through the same media interface connection and it defaults to the iPod), so you will need to unplug it so that you are able to select the aux input.
- If you are able to enter into aux mode(not grey color like disabled), that means your car has aux function, then you can use a Aux cable to connect your phone, play music with your phone, and see if the music sound comes out from car speakers, if yes, that means your car’s Aux works well now.
- By the way, your aux volume may be lower compared with radio and CD’s sound, that’s normal for nearly all Mercedes Benz C-Class W204.
Why AUX function is so important?
AUX is used to transfer the music sound from the new aftermarket Mercedes-Benz W204 head unit to your car speakers, so if your W204 does not have AUX function, there will be no sound from the new USB or SD function. By the way, the GPS sound comes out from a small speaker included in the package, so that you can listen to factory radio or CD and use GPS navigation system at the same time.
You may also be interested in:
How to install Mercedes Benz C W204 Navigation GPS?
If you have any other questions, welcome to contact us, DVDGPSNav would be glad to assist you.
Jun 15 2017
Installation Instructions of Android Mercedes Benz C-Class W204 Navigation Head Unit
Android navigation head unit for Mercedes-Benz C-Class W204 is available now, this navigation unit fits Mercedes Benz W204 C180, C200, C220, C230, C280, C300, C320, C350, etc, inbuilt GPS navigation system, Bluetooth hands free phone calling, Bluetooth streaming music A2DP, USB, SD, Mirror-Link, supporting steering wheel controls and a backup camera with RCA connectors.
The latest version comes with 2 theme style available.
For more information about this unit, you can check it here: https://www.dvdgpsnav.com/mercedes-benz-c-w204-android-gps-head-unit-bluetooth-system-for-mercedes-c-180-c-200-c-220-c-230-c-280-c320-c-350.html
If your Mercedes Benz W204 comes with original 5.8 inch small screen and a working aux function, you can order and install this unit in your car, this head unit can also fit factory 7 inch screen w204 now. If you don’t know if your car has aux or not, you can check our previous post: How to check if my W204 has aux function?
Installation for this W204 Android navigation is more or less the same as the Wince version, if you have check other posts from this blog, you may have already seen How to install Wince version Benz C W204 navigation GPS.
Installation instructions for Android Mercedes-Benz C-Class W204 navigation head unit
The first step is removing the factory Mercedes-Benz W204 screen unit and radio/CD, then you can connect all cables and install new touch screen W204 head unit in your car.
Click the above picture for larger view.You need to connect the white CAR-LVDS plug with your LVDS plug behind your factory screen.
Secondly, please check every plug with different colors carefully, the correct connections should be as following:
There are 2 square big plugs to connect your CD and factory wiring harness, see below picture:

Important! If there are fiber optic cables from factory wiring harness, you need to move them to our new plug at the same position as below:
You can put the main unit box in the glove box as below.
If you don’t know how to detach the glove box, you can check this video on how to remove the glove box for Mercedes W204.
And there’s trigger line which should connect 12V+ reverse light, see below pic:
Besides, you should get the power for the camera with 12V reverse light(not from our 12V power), so after you put in reverse gear, the camera can get power and automatically display rear view images on screen.
Note: If you have connected the camera correctly, but still no signal or the display is not stable, that’s because the voltage from your car reverse light is not stable, we have a solution, you can connect a relay to power the camera. A professional mechanic should know how to connect the relay for the camera easily. Here’s a document with clear photos for you to check how to connect the camera for Mercedes W204 and how to connect a relay, you can download it here
The second solution is by using a aux-adapter audio cable from us to connect our main unit and your 3.5 mm aux port directly in the glove box to get the factory aux working. You can check this cable as below:

Note: this cable is not included in the package by default, because only very few cars need it.
If there’s no sound from car radio or CD playing, you need to check the fiber optic cable plug which connected to our new plug as below:
Solution: Please turn off your car and the unit, then you can disconnect the entire square plug from your CD, then re-connect the fiber optic plug with our CD plug, make sure it’s well connected. We had one customer the first time installed but there’s no sound from radio, after he checked and re-connected the fiber optic plug the sound issue solved.
After installation if your old factory OEM menus does not display normally, don’t worry, you can contact us we will tell you how to set it correct in settings. Because there are 2 different OEM screens from Mercedes-Benz W204, one is with factory small 5″ screen, the other is with factory large 7″ screen, the screen resolution is different.
If you still have a question while installing, please take some photos for us to check all cables and plugs connections and send to us via email sales@dvdgpsnav.com, our technicians would be glad to assist you. You can also contact us on Facebook:
https://www.facebook.com/dvdgpsnav
or send a message to our whatsapp: +86 13424170755
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Last modified: April 3, 2020 By DVDGPSNAV Posted in Android Navigation System, DVD/GPS Installation, Mercedes Benz • 34 • Tags: android w204 navigation, installation instructions, Mercedes-Benz C-Class W204, w204 android gps, w204 android head unit, W204 navigation