1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Bonroad 12.3-inch Linux Car Stereo Radio. Designed to enhance your driving experience, this multimedia unit integrates seamlessly with your Mercedes-Benz B Class, offering advanced features like wireless CarPlay, Android Auto, navigation, and more, while retaining original car functionalities.
2. Compatibility and System Identification
This unit is compatible with specific Mercedes-Benz B Class models and NTG systems. Please verify your car's system before installation.
2.1. Compatible Models and Years:
- Mercedes-Benz B Class W246 2013-2015 (NTG 4.5 System)
- Mercedes-Benz B Class W246 2016-2018 (NTG 5.0 System)
2.2. Identifying Your NTG System:
It is crucial to identify your car's NTG system version (4.5/4.7 or 5.0) to ensure correct product selection and installation. The distinction can often be made by examining the original CD radio unit.
3. Package Contents
Please check the package for the following items:
- 12.3-inch Multimedia Screen Unit
- Main Wiring Harness
- Installation Bracket (varies by car model)
- USB Cable
- GPS Antenna
- User Manual (this document)
4. Installation Guide
The Bonroad car stereo radio is designed for plug-and-play installation, minimizing the need for wire cutting. However, professional installation is recommended if you lack relevant experience.
4.1. Pre-Installation Checks:
- Ensure the car is turned off and the battery is disconnected.
- Confirm your car's NTG system version (4.5/4.7 or 5.0) matches the unit.
- Verify all components listed in the package contents are present.
4.2. Wiring Instructions:
The unit uses an ISO interface for connection. If your OEM connector has a fiber optics cable, you must carefully move it to the new connector on the provided harness.
4.3. Initial Setup After Installation:
After physical installation, perform the following software configurations:
- NTG System Selection: If the original car screen shows black or "no signal", navigate to
Setting > About > NTG setting > Automatically select [car type]. - Audio Output: If there is no sound, enter the Benz NTG menu, find the Audio settings, and set the sound source to AUX. If your car lacks AUX but has AMI, an additional AMI cable is required to connect to the AMI port, and the sound source should be set to AMI.
- Factory Setting Code: The factory setting code is
8888.
5. Operating Instructions
Your Bonroad multimedia unit offers a range of features to enhance your in-car experience.
5.1. Switching Between Original and Android Menus:
You can freely switch between the original car system interface and the new Android menu with a single button press.
5.2. Wireless Apple CarPlay & Android Auto:
The unit features built-in wireless CarPlay and Android Auto. No extra adapters are needed.
- Connect your phone via Bluetooth.
- Open the "Zlink5" APP on the unit (it may switch automatically).
- Wait for the connection to establish.
5.3. Navigation & Maps:
Utilize online or offline maps. Download your preferred navigation apps like Google Maps, Waze, or iGO from the Play Store.
5.4. Bluetooth Music & Phone Calls:
Connect your phone via Bluetooth to stream music and make hands-free phone calls.
5.5. Siri Voice Control:
The unit supports Siri voice control for hands-free operation of music, navigation, and phone calls, promoting safer driving.
5.6. Original Car Settings Integration:
The unit retains original car functions, including the car knob, system controls, steering wheel buttons, sound stereo, and CD radio. The original menu supports iDrive control, while the Android menu supports iDrive and touch screen control.
5.7. Accessing Original Car Interface Settings:
To access factory car settings, touch the OEM car system icon. Slide the screen to reveal factory car settings. Long-press options to enter and select them.
5.8. 4G LTE Internet & WiFi:
The unit has built-in 4G and WiFi functions, allowing you to connect to the internet and download apps from the Play Store.
5.9. AirPlay & AutoLink (Mirror Link):
Support for wireless/wired mirror link for both iOS and Android phones. This feature allows you to display your phone's screen on the car stereo, enabling navigation, video playback, and more.
5.10. Original Car Information Display:
The unit integrates OEM car-centric functions, displaying information such as speed, engine speed, fuel level, oil pressure, temperature, parking brake status, and seat belt reminders on the dashboard in your chosen theme.
5.11. Camera Support:
The unit supports both factory original reverse cameras and parking sensors, as well as aftermarket reverse cameras and 360-degree cameras.
6. Maintenance
- Cleaning: Use a soft, dry cloth to clean the screen and unit. Avoid abrasive cleaners or solvents.
- Software Updates: Periodically check for software updates to ensure optimal performance and access to new features.
- Temperature: Avoid exposing the unit to extreme temperatures.
7. Troubleshooting
Here are solutions to common issues you might encounter:
- Q: The factory camera cannot display?
- A: Enter
Setting > Car settings > Camera Type > Factory Camera. - Q: No sound during a phone call via CarPlay after connecting the phone?
- A: After installation, enter the Benz NTG menu, find the Audio settings, and set the sound source from AUX/USB (for NTG5.0).
- Q: How can I change the unit from °C to °F?
- A: Go to
Settings > Display > Unit selection > Temperature Unitand choose your desired unit (e.g., °F). - Q: My Benz system doesn't work?
- A: Click
Setting > About > NTG setting > Automatically select [car type]. - Q: I have an audio problem (no sound)?
- A: Firstly, enter the Benz NTG menu, then set the sound source from USB or AUX.
- Q: Original car knob cannot be used?
- A: Check the power cable to ensure the correct connector is plugged in.
- Q: Bluetooth calling has no sound?
- A: Enter
Setting > About > Factory setting (8888) > Benz Setting > Small speaker switching mode > Manual. - Q: What is the factory setting code?
- A: The factory setting code is
8888.
8. Specifications
| Feature | Specification |
|---|---|
| Brand Name | BONROAD |
| Operating System | Linux |
| Processor Type | Linux (MTK8581 CPU, 8-core) |
| Running Memory (RAM) | 4GB |
| Storage Memory (ROM) | 32GB |
| Display Size | 12.3 inches |
| Resolution | 2400*900P |
| Touch Screen | Yes |
| Built-in Screen | Yes |
| Power Output | 4*45W |
| Voltage | 12 V |
| Item Weight | 2kg |
| Special Features | Built-In Speaker/Microphone, WiFi function, Support steering wheel control, CarPlay, Android Auto, Reversing Input |
| Digital Media Format | Mp3, MP4, WMA, JPEG |
| Interface | ISO |
| Certification | CE, WEEE |
9. User Tips
- Always ensure your car's NTG system is correctly identified before purchasing to avoid compatibility issues.
- If you plan a DIY installation, contact the seller for specific installation guides and setting steps.
- For optimal audio, ensure the correct AUX/USB input is selected in the Benz NTG menu after installation.
- Regularly check for software updates to keep your system running smoothly and access the latest features.
10. Warranty and Support
The Bonroad 12.3 Inch Linux Car Stereo Radio comes with a 1-year warranty.
For any technical support, installation queries, or warranty claims, please contact the seller directly. They can provide detailed installation guides and assist with specific settings or troubleshooting steps.
