JB4 Tuner

The Burger JB4 Tuner is a sophisticated plug-and-play performance tuning system engineered to unlock significant power and torque from your turbocharged Mercedes-Benz. This device installs between your car's sensors and its engine control unit (ECU), safely increasing turbocharger output by 3-6psi. This tuner offers substantial power gains, ranging from up to 50whp for the C300, up to 60whp for the C400/C450, and up to 70whp for the C43 on pump gas. Higher gains are achievable with racing fuel or E85 mixtures. The JB4 system also improves 0-60 and quarter-mile times and includes multiple tuning maps to accommodate different fuel types, including support for E85 ethanol blends. It also features the ability to read and delete fault codes, display and log up to 40 engine parameters, control boost by gear for better traction, and manage exhaust flap operation on supported vehicles. A key feature of the JB4 Tuner is its Bluetooth 4.0 connectivity, allowing seamless integration with the free JB4PRO app for iOS and Android devices. This enables users to wirelessly connect, record and analyze vehicle data, change performance maps, and update firmware. The app provides an intuitive interface with help buttons and advanced log analysis tools. The tuner itself is housed in a durable billet aluminum enclosure and comes with a 5-year warranty. It's designed and assembled in the USA and is not VIN-locked, allowing for easy removal and resale. The specified platform for this particular JB4 tuner is for All 2015-2018 and non-C300 2019+ Mercedes-Benz models. It's important to note that 2019+ C300 models utilize new SENT pressure sensors and require a unique JB4 system; this particular unit is not for those specific applications. The tuner runs as smoothly as stock, is compatible with all driving modes, and has no impact on fuel economy during normal driving, though it requires 91 octane or better for optimal performance gains.