RENNTech  ECU Upgrade CLS 550



Our proprietary ECU upgrade for the Mercedes M278 engine in the new CLS 550 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 translating to an astonishing 530 HP and 606 lb/ft at the crank!
RENNTech  ECU Upgrade CLS 550



$1490.00 USD
530 hp
606 lb./ft. torque


  RENNTech  ECU Upgrade CLS 550  RENNTech  ECU Upgrade CLS 550