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  1. #1
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    Oct 2011
    Stuart, FL
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    RENNtech ECU+ Upgrade for Mercedes-Benz S560 | 584 HP | 642 LB-FT

    RENNtech proudly releases their ECU+ Upgrade for the Mercedes-Benz S560. Equipped with the Mercedes-Benz M176 4.0L V8 BiTurbo engine, RENNtech measured the stock performance with 484 HP and 538 LB-FT. With just the upgraded ECU software RENNtech gained up to 100 HP and 102 LB-FT over stock, bringing the maximum power output up to 584 HP and 642 LB-FT.

    The Dyno graph shows that RENNtech increased the power consistently in the crucial rpm-range between 4,850 rpm - 5,800 rpm. During wide open acceleration this rpm-range is key, as the car will not fall out of this powerband after shifting. A maximized area underneath the power curve within this range leads to incredible performance.

    On the streets the S560 improved its 0-60mph time from 4.74 sec to 4.25 sec, 0-100 mph from 10.85 sec to 9.14 sec and the 60-130 mph sprint from 14.05 sec to 11.01 sec. The quarter mile is now passed in 12.42 seconds @ 117mph, improved by 0.73 sec and 6 mph over stock.

    Also available for the W222 – S560 Sedan are RENNtech’s BOV Adapters and Carbon Fiber Decklid Spoiler, along with their newly released forged Performance Series wheels, the RPS 10.2- available in a 21”/21” and 21”/22” configuration with over 70 color options. Additionally, the RENNtech plug’n’play Hand-Held Suspension Module allows to fully custom suspension-height adjustment within seconds, without any wiring or extensive installation.

    All products are available at

    Product Page

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    Click here to enlarge

  2. #2
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    Jan 2010
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    Renntech launches W222 S560 ECU tune for the M176 4.0 liter twin turbo V8 - +85 rwhp

    The M176 4.0 liter twin turbo V8 is a very interesting Mercedes tuning prospect. Why? Because it is a value version of the M177/M178 4.0 liter twin turbo V8's and will be utilized in more models.

    Click here to enlarge

    You will see the M176 phase out the M278 and this is great news. Those that buy 560 models such as the W222 S560 are essentially getting an AMG engine architecture at a discount.

    Not to mention the tuning potential. The S560 is rated at 463 horsepower by Mercedes-Benz. That is even slightly underrated according to Renntech's baseline:

    Click here to enlarge

    Now look at the tuned figures. 502 horsepower at the wheels with 552 lb-ft of torque at the wheels as well.

    A budget S63 AMG? Yes indeed! Look at the acceleration figures:

    Performance Tests:
    Vehicle Upgrades 0-60mph 0-100mph 60-130mph 1/4 Mile ET Trap Speed
    W222 - S560 Sedan Stock w/o Launch Control 4.74 sec 10.85 sec 14.05 sec 13.15 sec 111 mph
    W222 - S560 Sedan Rt ECU+ Upgrade w/o Launch Control 4.25 sec 9.14 sec 11.01 sec 12.42 sec 117 mph
    *If not otherwise noted, performed on non-prepped asphalt and with OEM, Street-Legal and/or Non-Performance tires. Data measured with Racelogic Performance Box.

    For now only the W222 S-Class gets the M176 V8 but expect it spread throughout the lineup as the M278 is phased out.

    Product page:

    Performance Numbers Overview

    Mercedes-Benz S560 Sedan (MY2018+ | W222 | M176 | 4.0L V8 BiTurbo) Stock Performance (at crank):

    Rated by Mercedes-Benz: 463 HP @ 5,250-6,000rpm; 516 LB-FT @ 2,000-4,000rpm
    Dyno measured by RENNtech: 484 HP @ 5,600rpm; 538 LB-FT @ 4,750rpm
    Note: Mercedes M176 engine performance when measured on the dyno obtains higher power numbers than rated from factory.

    Mercedes-Benz S560 Sedan (MY2018+ | W222 | M176 | 4.0L V8 BiTurbo) Modified Performance (at crank):

    Rated by RENNtech (peak @ Crank): 584 HP @ 4,800rpm; 642 LB-FT @ 4,550rpm
    Rated by RENNtech (peak @wheel): 502 whp @ 4,800rpm; 552 wtq @ 4,550rpm
    Crank Performance Numbers are calculated with a 14% Drivetrain loss on RWD vehicles.
    For detailed explanation on crank HP, wheel HP, drivetrain loss, etc. please click here.

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