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 556 HP and 550 lb/ft torque, to an astonishing 669 HP and 734 lb/ft at the crank! This allows the M157 engine to run the quarter mile in an impressive 11.37 seconds at 125.01 mph with 0-60 mph coming in a mere 3.4 seconds.

 CL 63 (C216) M157 Bi Turbo-Stock Performance (Non Performance Package):

• 536 HP @ 5500 RPM; 590 LB-FT @ 2-4500 RPM

CL 63 (C216) M157 Bi Turbo-Stock Performance (With Performance Package):

• 563 HP @ 5500 RPM; 664 LB-FT @ 2-4500 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 (With Performance Package):

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

Modified Performance (Non Performance Package):

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