RENNtech ECU+ Upgrade | W166 | ML 550 | 540HP / 705LB-FT | 4.7L V8 BiTurbo | M278 mercedes-benz-e-class-wagon--213---2017-present--e-53-amg-esr5164676 384 wtq @ 3

384 wtq @ 3

609 awtq @ 3

798 LB-FT @ 4

0L I6 Turbo EQ Boost | Up to 494 HP / 480 LB-FT | Gains: +59 HP & +97 LB-FT

3 Series CABRIOLET (E93) M3 V8 (FOR USA MARKET ONLY) (HP: 420 | Year: 08 > 09)

RENNtech ECU+ Upgrade | W166 | ML 550 | 540HP / 705LB-FT | 4.7L V8 BiTurbo | M278 mercedes-benz-e-class-wagon--213---2017-present--e-53-amg-esr5164676 384 wtq @ 3ECU+ Upgrade 540HP 705LB FT Gains: +92HP +167LB 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