Contents
The Mercedes-Benz W177 (A-Class) is equipped with a high-tech infotainment system that supports multiple languages. By default, users can change the language through the vehicle’s menu, but in some cases, a deeper level of customization is required, especially if certain language options are not available. This can be done using DTS Monaco, a professional diagnostic and coding software used for Mercedes-Benz vehicles.
In this guide, we will walk you through the process of changing the language on a Mercedes W177 from English to Arabic using DTS Monaco.
Requirements
Before you begin, make sure you have the necessary tools:
Hardware:
- A compatible diagnostic interface (such as SD Connect C4/C5 or VXDIAG).
- A laptop with Windows OS.
Software:
- DTS Monaco (installed and properly configured).
- Xentry or Vediamo (optional for additional verification).
Step-by-Step Guide to Changing Language on W177
Step 1: Launch DTS Monaco
- Connect your diagnostic interface to the Mercedes W177 OBD2 port.
- Open DTS Monaco on your laptop.
- Ensure that your vehicle is correctly recognized in DTS Monaco before proceeding.
Step 2: Enter Variant Coding Mode
- In DTS Monaco, select the ECU variant coding mode.
- This mode allows you to modify system parameters and change the default settings of the vehicle’s control modules.
Step 3: Connect to the HU6 Control Unit
- Locate and connect to HU6 (Head Unit 6), which controls the infotainment system and display settings.
- Choose the [004] Main Write option.

Step 4: Modify Language Settings
- Look for the “Language” parameter in the coding options.
- Change the language setting from English to Arabic.
Step 5: Save and Apply Coding Changes
- Confirm the changes and initiate coding.
- Wait for the system to complete the process.
- Once finished, restart the vehicle’s infotainment system to apply the new settings.
Verification & Testing
After changing the language setting, follow these steps to ensure that the modification was successful:
- Restart the vehicle and check if the infotainment system now displays in Arabic.
- Navigate through menus to verify full language adaptation.
- If the language change is not applied correctly, repeat the process or recheck the coding parameters.
Troubleshooting Tips
- Ensure that the coding changes are saved properly before exiting DTS Monaco.
- If the language does not change, double-check the selected ECU and variant coding settings.
- Some updates may require a full system reboot or vehicle restart to take effect.
- If DTS Monaco is not working properly, verify that your hardware and software versions are compatible.
Why Use DTS Monaco for Language Change?
DTS Monaco provides deep access to vehicle coding parameters, allowing for modifications that are not available through the standard menu settings. This is especially useful for:
- Unlocking hidden features.
- Changing regional settings.
- Customizing infotainment preferences.
If you want to master DTS Monaco, the book “DTS Monaco Engineering: Comprehensive System Training“ is a must-read. It covers all the essential information about how the software works and how to use it effectively for coding and programming.
On the other hand, if you’re interested in unlocking the hidden features of Mercedes-Benz, then “100 Mercedes Hidden Features – A Coding and Programming Guide“ is the perfect resource for you.
Need Expert Help? Contact AutoExplain
Changing vehicle settings using DTS Monaco requires experience and knowledge. If you’re unsure about the process or need professional assistance, AutoExplain is here to help!
We provide expert car diagnostics, coding, and programming support. Contact us today via WhatsApp at +84967469410 for fast and reliable assistance!
By following this guide, you can successfully change the language settings on your Mercedes W177 and customize your vehicle’s infotainment experience to suit your preferences. Happy coding!