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RennTech ECU Upgrade Mercedes-Benz SL550 11-13

$2,740.00 Sale:$2,657.80


Model #54.231.SL550BT

In Stock

Shopper Award

This product is for Racing Competition only and is not legal for use in highway or street vehicles or other non-racing competition off-road vehicles.

Purchasing this product requires you to sign our Vehicle Compliance Waiver here.

With custom software that is at the cutting edge of tuning technology, RENNTECH has inspired some of the most advanced software upgrades on the market today. RENNTECH customers experience improved throttle response, more aggressive transmission shift patterns, increased speeds, and (of course) more power. Designed to optimize every aspect of a vehicles performance, increasing low-end torque for better off-the-line performance and enhancing fuel economy in some applications.

Their proprietary ECU upgrade for the Mercedes M278 engine in the new SL 550 offers huge gains in performance across the entire RPM range without sacrificing around town comfort or daily driver reliability. The ECU tune offers the biggest performance gains on the market translating to an astonishing 530 HP and 606 lb/ft at the crank!

SL 550 (R231) Stock Performance:
  • 429 HP @ 5,250 RPM; 516 LB-FT @ 1,800-3,500 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
  • 101 HP gain
  • 90 FT-LB gain
  • ECU upgrade
  • Mercedes-Benz, SL550, R231, 2011-2013
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Vehicle Engine Notes
Mercedes-Benz SL550

RENNTECHs philosophy has always been to produce products without compromise, and that dedication continues to this day. True to Mercedes-Benz quality, RENNTECH cars are designed to be fast yet refined. Regardless of specification, they run faultlessly, idle smoothly, and have reliability and ease of maintenance comparable to the stock Mercedes-Benz. This attention to detail has made RENNTECH the choice of some of the most discriminating enthusiasts in the world.

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