RENNtech M157 Biturbo ECU Upgrades are TÜV approved!

Our intermediate level ECU upgrade for the Mercedes M157 Biturbo 4-MATIC engine offers huge gains in performance across the entire RPM range without sacrificing around town comfort or daily driver reliability.

This is ideal for customers who want increased performance in their daily driver without worry of extra strain on driveline components or for areas and countries with extreme altitudes, temperatures or fuel quality concerns. 

This is a slight reduction from our standard tune but still offers white knuckle performance at one of the most affordable price points in the tuning market.

Notes:

• We have found the M157 engine stock performance numbers vary from the baseline figures claimed by Mercedes Benz. We typically see higher baseline numbers than claimed by the factory.
• Power gains are calculated based on stock numbers measured by RENNtech. Crank Performance Numbers are calculated with a 17% Drivetrain loss on 4MATIC vehicles.
• Our numbers will be dependent on conditions and fuel quality. 93+ Octane gasoline is mandatory with this Performance Upgrade.
• States known for poor fuel quality have to be supplied with a lower power setup.

Performance Numbers Overview 

S 63 AMG (W222 | Sedan | MY2014+ | 4MATIC | M157 | 5.5L V8 BiTurbo) Stock Performance (at crank):

• Rated by Mercedes-Benz:      577 HP @ 5,500rpm; 664 LB-FT @ 2,000-4,500rpm
• Rated by RENNtech:               605 HP @ 5,500rpm; 669 LB-FT @2,800-3,900rpm
  • Note: Mercedes M157 engine performance when measured, obtains higher power numbers than rated from factory.

S 63 AMG (W222 | Sedan | MY2014+ | 4MATIC | M157 | 5.5L V8 BiTurbo) Modified Performance (at crank):

• Rated by RENNtech:               638 HP @ 5,500rpm; 695 LB-FT @ 3,700rpm

                                                          530 awhp @ 5,500rpm; 577 awtq @ 3,700rpm

• • Crank Performance Numbers are calculated with a 17% Drivetrain loss on 4MATIC vehicles.