RENNtech TCU upgrade for Mercedes-Benz 9G-Tronic Plus automatic transmission increases clutch torque limits and pressure, generating faster shifts and less slip for faster acceleration times.

TCU tuning is recommended for use with RENNtech ECU and Turbo upgrades, but also delivers sharper shifting and a more robust feel to stock vehicles.
Installation and programming of TCU tune requires no tools and takes only 2 minutes.

ABOUT RENNtech Option Modules -
RENNtech Option Modules (ROM) are electronic modules that offer quick solutions to override electronic factory settings and restrictions.
Installation is done in minutes through the OBD II -port, and requires no tools.