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RENNtech ECU Upgrade | SL 65 AMG | R231 | 735HP/836TQ | 6.0L BiTurbo V12 | M279

RENNtech ECU Upgrade | SL 65 AMG | R231 | 735HP/836TQ | 6.0L BiTurbo V12 | M279

AED 13,980.00

Plus shipping, applicable import duty and installation.

SKU: ECU:54.231.SL65. Category: .

Product Description

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.

  • Note: We have found the new M279 engine stock performance numbers vary from the baseline figures claimed by Mercedes Benz. We typically see slightly higher baseline numbers than claimed by the factory.

SL 65 (R231) Stock Performance:

  • 621 HP @ 4800 RPM; 738 LB-FT @ 2300-3000 RPM

Modified Performance:

  • 735 HP @ 5200 RPM; 836 LB-FT @ 3500 RPM


  • +114 HP & +100 TQ
How We Operate

Our online store allows you to choose the best performance parts for your car. Instead of having the items delivered to your home, we can deliver direct to your local service center. You can browse products on this website. Please feel free to place an order and one of our representatives will contact you to arrange delivery and installation if requested of your new performance parts.

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