RennTech Performance ECU Upgrade For Mercedes-Benz W463 G 65 AMG

VENDOR: RennTech

SKU: 54.463.G65BT

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 tuning software for Mercedes offers significant gains in horsepower and torque across the vehicle's entire power band. By modifying ignition timing and throttle mapping, optimizing air-to-fuel ratios, increasing the engine's rev limiter and modifying boost mapping for turbo-charged vehicles, RennTech performance software unleashes the true potential of your Mercedes.


  • Gains: +88 HP & +65 LB-FT
  • 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:

  • 621 HP @ 5,00-5,300rpm; not published
  • 635 HP @ 5,650rpm; 636 LB-FT @ 3,050rpm

Modified Performance:

  • 670 HP @ 5,350rpm; 740 LB-FT @ 4,050rpm
  • 536 whp @ 5,350rpm; 592 wtq @ 4,050rpm

      Vehicle Fitment:    

      • 2013 Mercedes-Benz W463 G 65 AMG
      • 2014 Mercedes-Benz W463 G 65 AMG
      • 2015 Mercedes-Benz W463 G 65 AMG
      • 2016 Mercedes-Benz W463 G 65 AMG
      • 2017 Mercedes-Benz W463 G 65 AMG
      • 2018 Mercedes-Benz W463 G 65 AMG


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