BMS JB4 Mercedes-Benz Plug and Play Tuning Box - C, E, V Class and 43 AMG Models 2015+
Unlock effortless power, torque and response from your Mercedes-Benz with the Burger Tuning JB4 piggyback tuner. This proven plug and play Mercedes tuning box connects to four easily accessible sensors on top of the engine and safely raises turbo boost by around 3 to 6 psi. Expect significant gains in horsepower and torque, sharper throttle response and stronger midrange punch while maintaining factory-like drivability.
On pump fuel typical gains range from 30 to 60 whp depending on map and model, with even higher potential on race fuel or ethanol E30 to E85 blends. On a 2015+ C43 AMG W205 a ~30 whp increase is expected with the JB4. Timing and fuelling are appropriately rescaled, and installation is fully reversible with no coding. Compatible with rear wheel drive and 4MATIC all wheel drive.
Looking for a Mercedes remap alternative in the UK? The JB4 is the go to Mercedes tuning solution for C250, C300, C400, C43 AMG, E300, E400, E43 AMG, GLA 43 AMG, GLC 43 AMG, GLE 43 AMG and V-Class owners who want reliable gains without permanent ECU flashing. We have run JB4 on our own cars and our customers consistently report smoother power delivery, stronger acceleration and a genuine seat of the pants improvement.
Note for 2019+ C300: these models use new SENT pressure sensors and require a unique JB4 system. Other 2019+ models such as C400, C450, C43 etc may migrate in future. We will update compatibility as new information becomes available. For the latest map guide, firmware and install notes, visit N54tech: http://www.n54tech.com/forums/showthread.php?t=28003
- Substantial power gains on pump fuel - typically 30 to 60 whp depending on map and model
- More potential on higher octane, race fuel and ethanol E30 to E85 blends
- True plug and play install using four factory connectors on top of the engine
- Advanced CANbus integration for unrivalled Mercedes tuning control and safety
- Runs smoothly like stock during normal driving with strong, linear power when you want it
- Compatible with all factory driving modes and both RWD and 4MATIC AWD
- Fuel economy unchanged during gentle driving
- JB4 Mobile app compatible for smartphone logging, map changes and on the fly adjustment
- Able to read and delete fault codes
- Not VIN locked - easily removed without a trace and can be resold
- Made in the USA with a 5 year BMS warranty
Optional accessories: add the Data Cable or the Bluetooth Connect Kit to unlock easy map switching, datalogging and setup from your phone. Perfect for fine tuning your Mercedes C-Class, E-Class, GLA 43 AMG, GLC 43 AMG and GLE 43 AMG.
JB4 maps for Mercedes-Benz turbo petrol engines:
- Map 0: Disables tuner
- Map 1: ~4 psi over stock peak - suitable for 91 octane+ fuels
- Map 2: ~6 psi over stock peak - suggested for 93 octane+
- Map 3: User definable fixed boost profile map
- Map 4: Stock performance with CANbus active for logging
- Map 5: ~6.5 psi over stock peak holding more to redline - suggested for E30+ or unleaded race fuel
- Map 6: User definable map - boost over stock entered on the user adjustment page
- Map 7: ~7 psi over stock peak - suitable for unleaded race fuel
- Map 8: Water or methanol integration progressive map coming soon
For the latest firmware and detailed guidance, see N54tech: http://www.n54tech.com/forums/showthread.php?t=28003
A-Class
• 2018+ A250 W177
• 2018+ A220 W177
B-Class
• 2014+ B250
CLA-Class
• 2014+ CLA 250 C117
C-Class
• 2015+ C200 W205
• 2015+ C250 W205
• 2015-2018 C300 W205
• 2014+ C400 W205
• 2015+ C43 AMG C205
• 2015+ C43 AMG W205
• 2015+ C450 W205
E-Class
• 2016+ E300 W212
• 2017+ E300 W213
• 2015+ E400 W212
• 2015+ E43 AMG W212
G-Class SUV and Crossover
• 2016+ GLE 250, 300, 43 AMG
• 2016+ GLC 250, 300, 43 AMG
• 2015+ GLA 250, 300, 43 AMG
SLC-Class
• 2017+ SLC 43
ML-Class
• 2015-2019 ML 400
V-Class and Vans
• 2016+ Metris Van W447
• 2016+ V-Class Van W447
• 2016+ Valente Van W447
• 2016+ Viano Van
Keywords for search: Mercedes JB4 tuner UK, Mercedes tuning box, Mercedes C43 AMG tune, Mercedes C300 tuning, Mercedes C400 JB4, Mercedes GLA 43 AMG tuning, Mercedes GLC 43 AMG tuning, Mercedes GLE 43 AMG tuning, W205 W213 W177 W447 performance upgrade, remap alternative, piggyback ECU, increase bhp and torque.
C300 Dyno Charts - click to enlarge
C450 with BMS Stage 1 - click to enlarge
Installation is quick plug and play using four factory connectors on top of the engine. The JB4 is fully reversible and leaves no trace once removed. No cutting, no coding and compatible with all driving modes.
Prefer professional fitting? Book a JB4 installation with Nforcd in Warwickshire. Email Sales@nforcd.com for a fitting quote and availability.
For firmware, setup help, logging and the latest Mercedes JB4 map updates visit N54tech: http://www.n54tech.com/forums/showthread.php?t=28003
We will run a compatibility check before dispatch to ensure perfect fitment for your Mercedes-Benz. Provide your UK registration number or the last 7 digits of your VIN at checkout and our team will verify the correct JB4 application.
MB-JB4
Manufactured by: Burger Tuning - BMS
Warranty: 5 year BMS warranty