RENNtech M157 Biturbo ECU+ Upgrades are TÜV approved!

Our proprietary ECU+ upgrade for the Mercedes M157 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; increasing performance from 563 HP and 594 lb/ft torque, to an astonishing 669 HP and 734 lb/ft at the crank! 

Performance Numbers Overview 

S 63 AMG (W221 | Sedan | MY2006-13 | RWD | M157 | 5.5L V8 BiTurbo) Stock Performance (at crank):

• Rated by Mercedes-Benz:      537 HP @ 5,500rpm; 590 LB-FT @ 2,000-4,500rpm
• Rated by RENNtech:               563 HP @ 5,500rpm; 594 LB-FT @2,800-3,900rpm
  • Note: Mercedes M157 engine performance when measured, obtains higher power numbers than rated from factory.

S 63 AMG (W221 | Sedan | MY2006-13 | RWD | M157 | 5.5L V8 BiTurbo) Modified Performance (at crank):

• Rated by RENNtech:               669 HP @ 5,500rpm; 734 LB-FT @ 3,700rpm

                                                          575 awhp @ 5,500rpm; 631 awtq @ 3,700rpm

• • Crank Performance Numbers are calculated with a 14% Drivetrain loss on RWD vehicles.