RENNtech ECU Upgrade CLS 550 (C218- 530 HP / 606 TQ for M278)

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SKU: ECU:54.218.CLS550BT

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!

CLS 550 (C218) Stock Performance:

  • 402 HP @ 5,000-5,750 RPM; 443 LB-FT @ 1,800-4,750 rpm
  • Note: Mercedes M278 engine performance when measured obtains higher numbers that rated from factory.

Modified Performance:

  •  530 HP @ 4900 RPM; 606 LB-FT @ 4100 RPM



Price: $2,740
Questions? Email RENNtech your Inquiry