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 with our dyno results increasing performance to an astonishing 669 HP and 734 lb/ft at the crank!

SL 63 (R231) Stock Performance (Without Performance Package):

• 530 HP @ 5250 RPM; 590 LB-FT @ 6000 RPM

SL 63 (R231) Stock Performance (With Performance Package):

• 557 HP @ 5500 RPM; 664 LB-FT @ 6000 RPM

• Note: We have found the new M157 engine stock performance numbers vary from the baseline figures claimed by Mercedes Benz. We typically see slightly higher baseline numbers than claimed by the factory.

Modified Performance (Without Performance Package):

• 669 HP @ 5500 RPM; 734 LB-FT @ 3800 RPM

Modified Performance (With Performance Package):

• 669 HP @ 5500 RPM; 734 LB-FT @ 3800 RPM