RENNtech ECU Upgrade | Mercedes-Maybach | S 600 | W222 | 582HP/752LB-FT | 6.0L BiTurbo V12 | M277 | MY2014-2017RENNtech ECU Upgrade for the Mercedes Maybach 222 S 600 BiTurbo V12. Up to 582HP and 752TQ. Gains: +59HP & +140TQ RENNtech HHT (hand held tuner) allows you the unlimited ability to switch between tuned and stock ECU programming and requires no ECU removal! Our 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.
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