RENNtech ECU Upgrade | E 400 | C207 | 392HP/432LB-FT | 3.0 L BiTurbo V6 | M276 | MY2015-2017 mercedes-benz-cls-class--218---2011-2014--cls63-amg-biturbo-esr5204476 This product is recommended with

RENNtech ECU Upgrade | E 400 | C207 | 392HP/432LB-FT | 3.0 L BiTurbo V6 | M276 | MY2015-2017 mercedes-benz-cls-class--218---2011-2014--cls63-amg-biturbo-esr5204476 This product is recommended withRENNtech ECU Upgrade for 212 E 400 BiTurbo 4 MATIC Coup. Up to 392HP and 432LB FT. Gains: +63HP & +78LB FT RENNtech M276 Biturbo ECU Upgrades are TV approved! 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

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