RENNtech ECU+ Upgrade | W212 | E 550 | 540HP / 705 LB-FT | 4.7L V8 BiTurbo | M278 | MY2012-2013 mercedes-benz-a-class--a176---2014-2018--a45-amg-esr4958388 911 - 997 3

911 - 997 3

Bentley Flying Spur Speed

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RENNtech and AMG Customer Logo on Chest

RENNtech ECU+ Upgrade | W212 | E 550 | 540HP / 705 LB-FT | 4.7L V8 BiTurbo | M278 | MY2012-2013 mercedes-benz-a-class--a176---2014-2018--a45-amg-esr4958388 911 - 997 3ECU+ Upgrade 540HP 705LB FT +105HP +262LB FT 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. Programming takes only a few minutes and the vehicle can be reflashed at