RennTech Performance ECU Upgrade For Mercedes-Benz W212 E400 Biturbo

VENDOR: RennTech

SKU: 54.212.E400BT

All orders will include an AutoTalent window decal


RennTech HHT (hand held tuner) allows you the unlimited ability to switch between tuned and stock ECU programming and requires no ECU removal. RennTech proprietary tuning module stores both the RennTech tuned file and your vehicles stock file. The module plugs directly into the OBD2 port and delivers the file you choose directly to the ECU. Programming takes only a few minutes and the vehicle can be reflashed at any time as many times as you wish.

RennTech has been at the forefront of ECU tuning since electronic engine management started to show up in vehicles during the mid 1980s. RennTech experience, countless hours of in-house research, development and exhaustive testing ensure that our proprietary ECU upgrade offers incredible performance gains and rock solid daily driver reliability.

RennTech ECU tune offers the biggest performance gains on the market with our dyno results increasing performance from 329 HP and 354 lb/ft torque, up to an astonishing 392 HP and 432 lb/ft at the crank.


  • Gains: +63HP & +78TQ
  • Long-lasting and driver reliability
  • Significant gains in horsepower
  • Increases the performance
  • Significant gains torque 
  • Increasing the engine's rev limiter
  • Incredible performance gains

      Stock Performance:

      • 329 hp @ 5,250-6,000 RPM; 354 lb-ft @ 1,600-4,000 RPM

      Modified Performance:

      • 392 hp @ 5,800 RPM; 432 lb-ft @ 3,110 RPM

      Vehicle Fitment:    

      • 2014 Mercedes-Benz W212 E E400 Biturbo
      • 2015 Mercedes-Benz W212 E E400 Biturbo
      • 2016 Mercedes-Benz W212 E E400 Biturbo


                                Images are for representation purpose only and may differ depending on application.