Mercedes-Benz CLS250 Android Head Unit Review — 12.3-inch Upgrade

Upgrade Your Mercedes-Benz CLS250 W218 with a 12.3-Inch Android All-in-One System

Welcome to our latest project! Today, we're showcasing a comprehensive upgrade for a Mercedes-Benz CLS250 W218, replacing the original display with a stunning 12.3-inch Android all-in-one system. While the CLS is renowned for its elegant design, the factory infotainment system, particularly its display size and functionality, can feel dated by today's standards. Common owner complaints often revolve around slow navigation updates and limited multimedia capabilities. This installation goes beyond a simple screen swap; it integrates a full Android operating system, offering a vastly enhanced user experience.

Before: Assessing the Stock CLS250 Display

The original CLS250 display is notably small and features a clunky, slow-reacting interface. The navigation system, a critical function for many drivers, often lacks real-time traffic updates, making it difficult to adapt to changing road conditions. The owner's primary request was clear: to bring the convenience and functionality of their smartphone experience into the car. The goal was to retain all existing factory functions while unlocking the freedom and versatility of Android. This meant the upgrade needed to be an extension of the original system, not a complete replacement that sacrifices factory features.

Seamless Integration: Custom Fit and Wiring

The key to a successful upgrade lies in flawless integration. After removing the original screen, the focus shifts to the dashboard fitment. For this CLS250, we utilized a custom-designed fascia specifically engineered for the W218 CLS model. This isn't just a filler piece; it precisely replicates the CLS dashboard's curves, material texture, and color. The result is a factory-perfect look, ensuring no visual disruption or awkwardness from the driver's perspective. The larger 12.3-inch screen blends harmoniously, maintaining the CLS's luxurious aesthetic while introducing modern multimedia capabilities.

Safety and reliability are paramount, especially with the complex electrical systems in European vehicles. Instead of cutting and splicing wires, which can compromise the vehicle's integrity and lead to future issues, we employed a plug-and-play, 'jack-by-jack' installation method using the original Quadlock connectors. Quadlock is Mercedes-Benz's standardized connector system for vehicle electronics. This approach eliminates the need for any wire modification, significantly reducing the risk to the car's electrical system and ensuring a clean, reversible installation should the owner ever wish to revert to the original setup.

Installation Process:

1. Careful removal of the original factory display unit.
2. Installation of the custom-fit fascia designed specifically for the Mercedes-Benz CLS W218.
3. Connection of the new 12.3-inch Android head unit using the Quadlock plug-and-play harness, ensuring no factory wiring is cut.
4. Configuration and testing of both the retained factory functions and the new Android system, including Android Auto and other apps.
5. Final dashboard reassembly and a thorough system check.

The Result: Enhanced Functionality and Connectivity

The most significant aspect of this upgrade is its 'overlay' architecture. The Android system doesn't replace the original Mercedes-Benz functions; it operates on top of them. This means you retain access to all essential factory information, including vehicle settings (like climate control and maintenance schedules), driving data (such as average fuel economy and trip distance), and warning indicators (like engine check lights or tire pressure warnings). Simultaneously, you gain the full power of Android. Access your favorite navigation apps like Google Maps or Waze with real-time traffic, stream music and videos via YouTube or Spotify, and utilize Android Auto for seamless smartphone integration. This dual functionality ensures you have the best of both worlds: the refined experience of your Mercedes-Benz combined with the limitless possibilities of a modern Android device.