{"product_id":"jb4-plug-and-play-performance-tuner-mercedes-benz-c300-c43-amg-e43-glc-gle","title":"JB4 Plug-and-Play Performance Tuner – Mercedes-Benz C300, C43 AMG, E43, GLC \u0026 GLE","description":"\u003cdiv class=\"product-description\"\u003e\n\u003ch1\u003eJB4 Performance Tuner for 2014+ Mercedes-Benz\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eUnlock hidden performance from your turbocharged Mercedes-Benz.\u003c\/strong\u003e\u003cbr\u003eThe \u003cstrong\u003eJB4 Performance Tuner\u003c\/strong\u003e is the most advanced plug-and-play tuning system available for modern Mercedes-Benz turbo vehicles. Designed to work seamlessly with your factory ECU, the JB4 safely increases boost, optimizes timing and fueling, and delivers substantial horsepower and torque gains—while maintaining factory-smooth drivability.\u003c\/p\u003e\n\u003ch2\u003e🔥 Proven Power Gains\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUp to +50 WHP\u003c\/strong\u003e on C300 models\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUp to +120 WHP\u003c\/strong\u003e on C400 \/ C450 models\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUp to +80 WHP\u003c\/strong\u003e on C43 AMG models\u003c\/li\u003e\n\u003cli\u003eEven greater gains possible with race fuel or E85 blends\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBoost pressure is safely increased by approximately \u003cstrong\u003e3–6 PSI\u003c\/strong\u003e, with timing and fueling intelligently rescaled to maintain reliability.\u003c\/p\u003e\n\u003ch2\u003e🔌 True Plug \u0026amp; Play Installation\u003c\/h2\u003e\n\u003cp\u003eThe JB4 installs in minutes using easy-to-access connections on top of the engine. No cutting, no splicing, and no permanent modifications.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCompletely reversible installation\u003c\/li\u003e\n\u003cli\u003eCompatible with AWD and RWD vehicles\u003c\/li\u003e\n\u003cli\u003eWorks with factory ECU and all driving modes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e🧠 Advanced CANbus Integration\u003c\/h2\u003e\n\u003cp\u003eUnlike basic two-channel tuning devices, the JB4 features full \u003cstrong\u003eCANbus OBDII integration\u003c\/strong\u003e, allowing it to monitor real-time engine data and make intelligent adjustments for smoother, safer, and more powerful performance.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFuel and spark control for safe high-power operation\u003c\/li\u003e\n\u003cli\u003eImproved performance and drivability vs. non-integrated chip tunes\u003c\/li\u003e\n\u003cli\u003eOptional BCM support for advanced boost control\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e📱 Smartphone Connectivity \u0026amp; Datalogging\u003c\/h2\u003e\n\u003cp\u003ePair your JB4 with a compatible Bluetooth adapter to unlock full wireless control through your iOS or Android device.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eChange performance maps on the fly\u003c\/li\u003e\n\u003cli\u003eView and log up to 40 engine parameters in real time\u003c\/li\u003e\n\u003cli\u003eRead and delete diagnostic fault codes\u003c\/li\u003e\n\u003cli\u003eUpdate firmware as new features and maps are released\u003c\/li\u003e\n\u003cli\u003eMeasure 0–60 performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eJB4 Mobile app sold separately ($29). Bluetooth adapter required.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003e🏁 JB4 Exclusive Performance Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eUp to 8 preloaded tuning maps\u003c\/li\u003e\n\u003cli\u003eEthanol (E85) compatible maps\u003c\/li\u003e\n\u003cli\u003eUser-adjustable boost-by-gear (1st, 2nd, 3rd)\u003c\/li\u003e\n\u003cli\u003eValet mode with reduced power\u003c\/li\u003e\n\u003cli\u003eExhaust flap control on supported vehicles\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e🚗 Mercedes-Benz Vehicle Fitment\u003c\/h2\u003e\n\u003ch3\u003eA-Class\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2018+ A220 (W177)\u003c\/li\u003e\n\u003cli\u003e2018+ A250 (W177)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eB-Class\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2014+ B250\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eC-Class \/ CLA \/ CLS\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCLA 250 (C117)\u003c\/li\u003e\n\u003cli\u003eCLS 400 (W218)\u003c\/li\u003e\n\u003cli\u003eC200, C250, C300 (W205)\u003c\/li\u003e\n\u003cli\u003eC400, C450 (W205)\u003c\/li\u003e\n\u003cli\u003e2015–2022 C43 AMG (W205)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eE-Class\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eE300 (W212 \/ W213)\u003c\/li\u003e\n\u003cli\u003eE400 (W212)\u003c\/li\u003e\n\u003cli\u003eE43 AMG (W212)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eGLA \/ GLC \/ GLE\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eGLA 250\u003c\/li\u003e\n\u003cli\u003eGLC 250 \/ 300 \/ 43 AMG\u003c\/li\u003e\n\u003cli\u003eGLE 250 \/ 300 \/ 350 \/ 43 AMG\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eS \/ ML \/ V-Class\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSLC 43\u003c\/li\u003e\n\u003cli\u003eML 400 (2015–2019)\u003c\/li\u003e\n\u003cli\u003eMetris, V-Class, Valente, Viano (W447)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e⚠️ Important Notes\u003c\/h2\u003e\n\u003cp\u003e2019+ C300 models use updated SENT pressure sensors and require a specific JB4 version. Please confirm vehicle details prior to ordering. Compatibility information will be updated as new model data becomes available.\u003c\/p\u003e\n\u003ch2\u003e✅ JB4 Features \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e30–70+ WHP gains depending on model\u003c\/li\u003e\n\u003cli\u003eImproves acceleration and quarter-mile times\u003c\/li\u003e\n\u003cli\u003eFuel economy unchanged during normal driving\u003c\/li\u003e\n\u003cli\u003e91 octane or higher recommended\u003c\/li\u003e\n\u003cli\u003eNot VIN-locked – transferable or resellable\u003c\/li\u003e\n\u003cli\u003eRemovable with no trace\u003c\/li\u003e\n\u003cli\u003eRugged billet aluminum enclosure\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e5-Year Manufacturer Warranty\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e❓ What Is a JB4?\u003c\/h2\u003e\n\u003cp\u003eThe JB4 is an advanced plug-and-play tuning system for turbocharged vehicles. It installs between your engine sensors and ECU, intelligently increasing performance while monitoring critical engine data via CANbus.\u003c\/p\u003e\n\u003cp\u003eOften imitated but never duplicated, the JB4 has been the gold standard in plug-and-play turbo tuning for over a decade and is trusted by enthusiasts in more than 67 countries worldwide.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BenzUnited Parts","offers":[{"title":"Default Title","offer_id":46514999034031,"sku":null,"price":699.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/8718\/9935\/files\/mercedes-benz-c-class-tuner-C63-jb4-_2_540x_5dad1596-fbff-4c51-aa60-a5b7767b9ef0.webp?v=1769378418","url":"https:\/\/benzunitedparts.com\/products\/jb4-plug-and-play-performance-tuner-mercedes-benz-c300-c43-amg-e43-glc-gle","provider":"BenzUnited Parts","version":"1.0","type":"link"}