Mercedes Benz 2003 CLK430


RENNtech ECU Upgrade CLK 430

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Product Information

RENNtech has been at the forefront of ECU tuning since electronic engine management started to show up in vehicles during the mid 1980's! Our experience, countless hours of in house research, development and exhaustive testing ensure that our proprietary ECU upgrade offers incredible performance gains and rock solid daily driver reliability.

RENNtech tuning software for Mercedes offers significant gains in horsepower and torque across the vehicles entire power band. By modifying ignition timing and throttle mapping, optimizing air/ fuel ratios, increasing the engines rev limiter and modifying boost mapping for turbo charged vehicles, RENNtech performance software unleashes your Mercedes true potential.

CLK 430 (W208) Stock Performance:

  • 275 HP @ 5750 RPM; 295 LB-FT @ 3000 RPM


  • 285 HP @ 5700 RPM; 307 LB-FT @ 3000 RPM
Brand: RENNtech
Product Code: 54.208.CLK430
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