Extensive research and development plus endless hours of testing, resulted in RENNtech¬Ļs new creation, the R.A.T. that ¬≥marries¬≤ itself to the first Mercedes Benz that it is plugged into. Designed for the ME2.7.1 and ME2.8.1, the R.A.T. distributes the bulk of its standard tuning for the Mercedes Benz E55 and 2006, or earlier, Mercedes V12 Turbos.
When connected to the OBD II port, the R.A.T. will make a pre-determined decision which firmware should be loaded for the specific vehicle. If the necessary firmware is not pre-installed, the supplied software can be used to email the results to RENNtech. Once the proper firmware is selected and tested, it is sent back to the user as an encrypted file containing the stock and modified firmware pair. The user then has the option to select between the stock and tuned files by using a switch located on the device. RENNtech is also able to design and send custom firmware to be used with 100-octane fuel.
The RENNtech Auto Tuner is designed so that if the programming process is interrupted, either by a power loss or by the user, it will automatically recover the ECU back to stock when plugged back in. This eliminates the need to pull the ECU for recovery.