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 to an astonishing 625 HP and 668 lb/ft at the crank! This allows the M157 engine to run the quarter mile in an impressive time and dramatically improves 0-60 mph times. ML 63 (W166) M157 Bi Turbo-Stock Performance (Non Performance Package):

• 518 HP @ 5250 RPM; 516 LB-FT @ 1750-5000 RPM

ML 63 (W166) M157 Bi Turbo-Stock Performance (With Performance Package):

• 550 HP @ 5250 RPM; 560 LB-FT @ 1750-5000 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 (Non Performance Package):

• 669 HP @ 5500 RPM; 738 LB-FT @ 3800 RPM

Modified Performance (With Performance Package):

• 669 HP @ 5500 RPM; 738 LB-FT @ 3800 RPM