Description
Unlock the true performance potential of your Mercedes-Benz turbocharged platform with the JB4 Performance Tuner, a cutting-edge plug-and-play solution engineered to deliver substantial horsepower gains without the need for ECU flashing. Designed for modern Mercedes-Benz vehicles, the JB4 provides power gains ranging from 50 to 100 horsepower, depending on fuel quality and tuning settings.
The JB4 integrates seamlessly with your factory ECU, optimizing boost pressure, ignition timing, and fueling for improved acceleration, sharper throttle response, and reduced turbo lag—while maintaining factory safety systems and smooth drivability.
Effortless Installation – No ECU Flash Required
The JB4 features a simple plug-and-play harness that connects to key sensors in the engine bay for a quick, clean installation. Unlike traditional ECU flash tunes, the JB4 leaves no footprint once removed, ensuring your vehicle remains undetectable to factory systems. It is fully compatible with all factory driving modes and maintains fuel efficiency during normal driving conditions.
Advanced CANbus Integration for Real-Time Tuning
Equipped with full CANbus integration, the JB4 reads and processes critical engine data directly from the ECU, including throttle position, pedal input, ignition timing, air/fuel ratios, fuel trims, engine knock, and gear selection. This enables adaptive, real-time tuning that maximizes performance while preserving engine safety and reliability.
Compared to basic tuning solutions, the JB4 offers superior power delivery, precision control, and advanced safety features—making it the preferred choice for high-performance Mercedes-Benz vehicles.
Wireless JB4PRO Connectivity Included
Included with this system is the JB4PRO Bluetooth adapter and free mobile app, allowing wireless control via iOS and Android devices. With the JB4PRO app, you can:
- Switch between multiple performance maps for different fuels and driving conditions
- Monitor and log up to 40 engine parameters in real time
- Read and clear diagnostic fault codes
- Analyze performance data and identify tuning improvements
- Install free firmware updates with enhanced maps and new features
The integrated adapter design ensures a clean installation with improved durability and weather protection.
Key Features & Benefits
- Gains of +50 to +100 HP depending on fuel and tuning level
- Improved 0-60 acceleration and quarter-mile performance
- Multiple tuning maps for various fuel types and performance levels
- Quick plug-and-play installation with no ECU flash required
- Supports E85 ethanol blends
- Reads and clears diagnostic fault codes
- Logs up to 40 engine parameters in real time
- Boost-by-gear control for improved traction
- Compatible with JB4PRO smartphone app (included)
- Full CANbus integration for real-time adaptive tuning
- Smooth, OEM-like drivability
- No impact on fuel economy during normal driving
- Requires 91 octane or higher for optimal performance
- Fully removable and not VIN-locked
- Durable billet aluminum enclosure
- Designed and assembled in the USA
- 5-year warranty
Vehicle Fitment
E-Class:
- 2021+ Mercedes-Benz E450
- 2021+ Mercedes-Benz E580
- 2021+ Mercedes-Benz E53 AMG
GLE:
- 2021+ Mercedes-Benz GLE53 AMG
AMG GT:
- 2020+ Mercedes-AMG GT43
- 2020+ Mercedes-AMG GT53
Why Choose JB4?
The JB4 is a true plug-and-play performance tuning system that delivers ECU-level control without requiring ECU unlocking or flashing. By integrating directly with your vehicle’s sensors and CANbus system, it safely adjusts boost, timing, AFR, and fuel trims in real time—delivering significant, reliable power gains while retaining factory safety systems.
With continuous free firmware updates, advanced customization, and a proven global reputation, the JB4 remains the industry-leading solution for turbocharged performance tuning.
