Description
Unlock the full performance potential of your turbocharged Mercedes-Benz with the JB4 Tuner, the industry-leading plug-and-play tuning solution designed for 2014+ models. Engineered for power, precision, and safety, the JB4 delivers substantial horsepower and torque gains while maintaining factory drivability and reliability.
At the core of the system is advanced CANbus integration, allowing the JB4 to communicate directly with your vehicle’s ECU and sensors in real time. This enables precise control over boost, fuel, and ignition parameters—delivering performance gains of 30–60+ wheel horsepower on pump gas, with even greater increases when using higher octane fuel or E85 blends.
The included JB4 PRO wireless connection system allows seamless integration with your smartphone via Bluetooth 4.0. Using the intuitive JB4 mobile app, you can monitor up to 40 engine parameters, switch between performance maps, read and clear fault codes, and perform detailed data logging and analysis. The compact adapter is fully integrated داخل the JB4 enclosure, providing enhanced weather protection and a clean, OEM-style installation.
Designed for both enthusiasts and daily drivers, the JB4 offers multiple tuning maps tailored to different fuel types and driving conditions. It improves acceleration metrics such as 0–60 mph and quarter-mile times, while maintaining smooth, stock-like operation during normal driving. The system also features boost-by-gear control for improved traction and supports exhaust flap control on compatible vehicles.
Installation is quick and fully reversible, with no permanent modifications required. The JB4 is not VIN-locked, allowing it to be removed, transferred, or resold with ease. Built with a durable billet aluminum enclosure and backed by a 5-year warranty, it represents one of the most advanced and reliable tuning solutions available today.
Key Features & Benefits
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- Gains of 30–60+ WHP on pump gas
- Increased power with E85 and high-octane fuel
- Improved 0–60 mph and quarter-mile performance
- Wireless Bluetooth connection via JB4 PRO system
- Smartphone control with advanced data logging
- Multiple performance maps for various fuel types
- Reads and clears diagnostic trouble codes
- Logs up to 40 engine parameters in real time
- Boost-by-gear for enhanced traction control
- Exhaust flap control (vehicle dependent)
- Full CANbus integration for precise tuning
- Smooth, factory-like drivability
- No ECU unlock or flash required
- No impact on fuel economy under normal driving
- Plug-and-play installation with easy removal
- Not VIN locked (transferable between vehicles)
- Durable billet aluminum enclosure
- Designed and assembled in the USA
- 5-year manufacturer warranty
Vehicle Fitment
Compatible with a wide range of 2014+ turbocharged Mercedes-Benz models, including:
A-Class
- A220 / A250 (W177)
B-Class
- B250
C-Class / CLA / CLS
- CLA 250 (C117)
- CLS 400 (W218)
- C200 / C250 / C300 / C400 (W205)
- C43 AMG / C450 AMG
E-Class
- E300 (W212 / W213)
- E400
- E43 AMG
SUV & Crossover Models
- GLA 250
- GLC 250 / 300 / 43 AMG
- GLE 250 / 300 / 350 / 43 AMG
S / Roadster
- SLC 43
ML-Class
- ML 400
Vans
- Metris / V-Class / Valente / Viano (W447)
What is the JB4 Tuner?
The JB4 is a sophisticated plug-and-play performance tuner that connects between your vehicle’s sensors and ECU. By leveraging real-time data through CANbus, it dynamically adjusts boost pressure, fuel delivery, ignition timing, and air-fuel ratios to deliver significant performance gains—without permanently altering your ECU.
Unlike traditional ECU flashes, the JB4 preserves factory safety systems and does not trigger ECU modification flags. This ensures a safe, smooth, and highly effective tuning experience with maximum flexibility.
