1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Road Top 12.3-inch Ultra-Narrow Wireless CarPlay Android Auto Screen. This display upgrade enhances your driving experience by integrating modern multimedia features while retaining your vehicle's original functions.
Image: Road Top 12.3-inch Ultra-Narrow Linux Touchscreen seamlessly integrated into a Mercedes-Benz dashboard, showcasing its sleek design and wide display.
2. Vehicle Compatibility
This CarPlay Android Auto screen upgrade is specifically designed for Mercedes-Benz NTG4.5/4.7 Systems. It is compatible with the following models:
- Mercedes-Benz CLA GLA Class C117, X117, X156 (2013–2015)
- Including CLA200, CLA250, CLA45 AMG, GLA200, GLA250, and GLA45 AMG.
Important: Audio is transmitted via AUX or Bluetooth. Your factory radio must support AUX input for proper sound output. Please confirm your vehicle's NTG system (NTG4.5/4.7) before purchase to ensure compatibility. This unit is not compatible with NTG5.0/4.0 systems.
Image: Visual guide illustrating compatible Mercedes-Benz NTG4.5/4.7 systems and incompatible NTG5.0/4.0 systems, highlighting key visual differences in the original car display.
3. Package Contents
The product package includes the following items:
- 12.3-inch Car Screen
- Power cable
- LVDS/USB cable
- AMI cable (if applicable)
Image: A visual representation of the package contents, including the 12.3-inch screen, its home screen interface, and essential connecting cables.
4. Installation Guide
Installation requires dashboard removal and wiring connection. Most issues are caused by incorrect wiring or system mismatch. Our technical team provides full support for troubleshooting. It is recommended to test all functions (CarPlay, Android Auto, MirrorLink) before reinstalling the dashboard.
4.1. General Installation Steps
For a detailed visual guide on installing the touchscreen for Mercedes-Benz A Class NTG4.5, please refer to the video below:
Video: Step-by-step installation guide for the Road Top Touchscreen in a Mercedes-Benz A Class with NTG4.5 system.
4.2. Fiber Optic Cable Relocation
If your vehicle's original power cord has a fiber optic cable, it must be carefully removed and connected to the new power cord. This process is crucial for maintaining audio functionality.
Video: Instructions on how to relocate fiber optic cables to the new Linux harness for Mercedes-Benz vehicles.
Video: Guide on connecting the fiber optic cable to the new power cable.
4.3. AMI Cable Connection
If your vehicle requires an AMI interface, ensure the AMI cable is properly connected as shown in the video below:
Video: Demonstrates how to connect the AMI cable if your vehicle requires this interface.
4.4. Visual Comparison (Before & After)
Observe the significant visual upgrade and seamless integration of the 12.3-inch touchscreen compared to the original factory screen.
Image: A side-by-side comparison showing the original car screen versus the new 12.3-inch touchscreen after installation, highlighting the enhanced display.
5. Operating Instructions
5.1. Wireless CarPlay & Android Auto
Transform your original system into a smart Mercedes-Benz CarPlay Android Auto head unit. This system supports Wireless CarPlay, Wireless Android Auto, navigation (Google Maps / Apple Maps / Waze), calls, messages, music, and various apps. Voice control is available via Siri and Google Assistant for safer and more convenient driving.
Image: Demonstrates the Wireless Apple CarPlay and Wireless/Wired Android Auto interfaces on the new display, showing navigation, music, and communication features.
Video: Illustrates how to connect wireless CarPlay (using a BMW screen as an example, the process is similar).
5.2. MirrorLink Function
The built-in MirrorLink support allows smartphone screen mirroring directly to your car display. This enhances entertainment and navigation flexibility by supporting app display and media streaming.
Image: Displays the Airplay and Autolink functions for iOS and Android devices, demonstrating screen mirroring capabilities.
Video: Shows how to connect wireless Airplay (using a BMW screen as an example, the process is similar).
5.3. Dual System Switching
Easily switch between the new Linux system and your original Mercedes-Benz OEM car system. Click "OEM Car Info" to enter the original system, and you can touch anywhere on the screen to return to the Linux system.
Image: Illustrates the seamless one-button switching functionality between the new Linux system and the original Mercedes-Benz OEM system.
Video: Demonstrates the dual system switch function (using a BMW screen as an example, the process is similar).
5.4. Menu Interface and Language Setup
Explore the intuitive menu display interface of the Linux screen and learn how to set up your preferred language.
Video: A detailed overview of the menu display interface for the Mercedes-Benz Linux Screen.
Video: Guide on how to set up the language on the Linux Touchscreen.
5.5. Day and Night Mode
The screen features automatic light sensitivity, adjusting between day and night modes based on your car's original headlights for optimal visibility.
Image: Visual demonstration of the automatic day and night mode feature, adapting the screen brightness and theme to ambient light conditions.
6. Camera & Parking System Support
The system supports multiple camera systems, enhancing parking safety and awareness:
- OEM factory reverse camera
- Aftermarket backup camera
- Front view camera
- DVR video input (CVBS signal)
- Parking radar display integration
Note: This system does not support aftermarket 360 camera systems.
Image: A clear view of the screen displaying the reverse camera feed with dynamic parking lines and integrated parking radar information.
7. Specifications
| Feature | Detail |
|---|---|
| Brand | Road Top |
| Screen Size | 12.3 Inches |
| Resolution | 1920 x 720 |
| Display Type | LCD |
| Touch Screen Type | Capacitive |
| Operating System | Linux |
| Connectivity Technology | Bluetooth |
| Special Feature | Apple CarPlay, Android Auto, MirrorLink |
| Compatible Devices | Smartphone |
| Mounting Type | Dashboard Mount |
8. Troubleshooting
If you encounter issues during installation or operation, consider the following common solutions:
- No Audio Output: Ensure your factory radio supports AUX input and that all audio cables are securely connected. Incorrect fiber optic cable relocation can also cause audio issues.
- Intermittent Functionality: Verify all wiring connections are firm and correct. A system mismatch or loose connection can lead to inconsistent performance.
- CarPlay/Android Auto Connectivity: Confirm Bluetooth is enabled on your phone and the device. Sometimes manual connection is required initially.
- Screen Blackout/Freezing: This may indicate a wiring issue or a system conflict. Double-check all connections and ensure the unit is receiving stable power.
For complex issues, please contact our technical support team with pictures or videos of the problem for assistance.
9. Warranty & Support
Your Road Top 12.3-inch Ultra-Narrow Wireless CarPlay Android Auto Screen comes with a 1-year warranty. We also offer a 30-day return and exchange policy.
For technical support, installation guidance, or any product-related inquiries, please contact the seller, Road Top Direct. You can typically find a "Contact Seller" or "Ask a question" option on the product's purchase page.
Image: Visual guide demonstrating how to locate and use the 'Ask a question' feature to contact Road Top Direct for support.