Mercedes CL65 AMG (2007-2013) – RENNtech ECU upgrade





RENNtech M157 Biturbo ECU Upgrades are TÜV approved!

RENNtech’s 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.

Their 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 on D.O.T. street tyres in an impressive 11.15 seconds at 126.7 mph with 0-60 mph coming in a mere 3.4 seconds.

Equipped with drag radials on the vehicle they were able to achieve an even more impressive quarter mile time. The M157 engine was able to rocket down the drag strip; clocking a quarter mile time of 10.9 seconds @ 129 mph with 0-60 mph coming in 3.2 seconds!

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



CL 65 (C216) Stock Performance:


  • 621 HP @ 5500 RPM; 738 LB-FT @ 2000-3000 RPM




Modified Performance:


  • 670 HP @ 5500 RPM; 840 LB-FT @ 3500 RPM


*NOTE – We would need either the ECU or the vehicle bringing to our premises in Cheshire

Due to some of the products coming direct from RENNtech USA please allow 7-10 days for delivery

Prices may vary in accordance to the current exchange rate, please contact us for the current confirmed price


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