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RENNtech ECU Upgrade | CLS 400 | C218 | 392HP/432TQ | 3.0L BiTurbo V6 | M276

RENNtech ECU Upgrade for 218 - CLS 400 BiTurbo 4-MATIC. Up to 392HP and 432TQ.
Gains: +63HP & +78TQ
SKU: ECU:54.218.CLS400BT
Retail price without tax: $2,240.00

RENNtech M276 Biturbo ECU Upgrades are TÜV approved!

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RENNtech HHT (hand held tuner) allows you the unlimited ability to switch between tuned and stock ECU programming and requires no ECU removal!

Our proprietary tuning module stores both the RENNtech tuned file and your vehicles stock file. The module plugs directly into the OBD2 port and delivers the file you choose directly to the ECU. Programming takes only a few minutes and the vehicle can be reflashed at any time as many times as you wish.

Our proprietary ECU upgrade for the Mercedes M276 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 with our dyno results increasing performance from 329 HP and 354 lb/ft torque, up to an astonishing 392 HP and 432 lb/ft at the crank!


CLS 400 BiTurbo (C218 - M276 Biturbo 4-MATIC Engine) Stock Performance:

  • 329 hp @ 5,250-6,000 RPM; 354 lb-ft @ 1,600-4,000 RPM
  • Note: Mercedes M276 engine performance when measured obtains higher numbers that rated from factory.


CLS 400 BiTurbo (C218 - M276 Biturbo 4-MATIC Engine) Modified Performance:

  • 392 hp @ 5,800 RPM; 432 lb-ft @ 3,110 RPM



Contact us

7825 SW Ellipse Way, Stuart, FL 34997
(+1) 561 - 845 7888
Mon - Fri 9am - 6pm


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7825 SW Ellipse Way - Stuart, FL 34997
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