RENNtech ECU Upgrade | S 600 | W222 | 582HP/752LB-FT | 6.0L BiTurbo V12 | M277

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 any time as many times as you wish.

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RENNtech M277 Biturbo ECU Upgrades are TÜV approved!

Our proprietary ECU upgrade for the Mercedes M277 engine offers huge gains in performance across the entire RPM range without sacrificing around town comfort or daily driver reliability.

Our ECU tune offers the biggest performance gains on the market with our dyno results increasing performance from 523 HP and 612 lb/ft torque, up to an astonishing 582 HP and 752 lb/ft at the crank!

S 600 BiTurbo (W222 - M277 6.0L BiTurbo V12 Engine) Stock Performance:

• 523 hp @ 4,900-5,500 RPM; 612 lb-ft @ 1,900-4,000 RPM

• Note: Mercedes M157 engine performance when measured obtains higher numbers that rated from factory.

S 600 BiTurbo (W222 - M277 6.0L BiTurbo V12 Engine) Modified Performance:

• 582 hp @ 4,700 RPM; 752 lb-ft @ 2,750 RPM