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RENNtech ECU+ Upgrade | W222 | Mercedes-Maybach S560 | 584HP/642LB-FT | 4.0L V8 BiTurbo | M176 | MY2018+

ECU+ Upgrade | Up to 584 HP / 642 LB-FT | Gains: up to +100 HP & +102 LB-FT
SKU: ECU:54.222.MM.S560BT
Retail price without tax: $2,980.00

RENNtech has been at the forefront of ECU tuning since electronic engine management started to show up in vehicles during the mid 1980s! 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 vehicle's entire power band. By modifying ignition timing and throttle mapping, optimizing air-to-fuel ratios, increasing the engine's rev limiter and modifying boost mapping for turbo-charged vehicles, RENNtech performance software unleashes the true potential of your Mercedes.


With the proprietary RENNtech ECU Tuning the W222 - Mercedes-Maybach S560 gains up to +100 HP and +102 LB-FT, based on power numbers measured by RENNtech. Please note that the Mercedes M176 engine performance when measured, obtains higher numbers than rated from factory. The maximum power number reached with the RENNtech ECU Upgrade for the S560 is 584 HP and 642 LB-FT.


50-State Street Legal RENNtech HHT

The HHT for Mercedes-Benz and Mercedes-AMG, 4.0 L BiTurbo V8, M176 | 177 | 178, engines is EPA Emissions compliant and street legal in all 50 States.

This product conforms to EPA Emission Standards and does not reduce effectiveness of your vehicles original pollution control systems.

A CARB Executive Order was granted to the RENNtech HHT based on emission test results in the modified configuration, an examination of the On-Board Diagnostic II (OBD II) system, and an engineering evaluation.

 50 State Logo Tag




  • We have found the M176 engine stock performance numbers vary from the baseline figures claimed by Mercedes-Benz. We typically see higher baseline numbers than claimed by the factory.
  • Power gains are calculated based on stock numbers measured by RENNtech. Crank Performance Numbers are calculated with a 14% Drivetrain loss on RWD vehicles.
  • Our numbers will be dependent on conditions and fuel quality. 93+ Octane gasoline is mandatory with this Performance Upgrade.
  • States known for poor fuel quality have to be supplied with a lower power setup. Please call for details and Race fuel options +1-561-845-7888.


Performance Tests:
Vehicle Upgrades 0-60mph 0-100mph 60-130mph 1/4 Mile ET Trap Speed
W222 - S560 Sedan

Stock w/o Launch Control

4.34 sec 10.37 sec 13.75 sec 12.83 sec 111 mph
W222 - S560 Sedan Rt ECU+ Upgrade w/o Launch Control 4.19 sec 9.00 sec 10.72 sec 12.38 sec 118 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.

Performance Numbers Overview 


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

  • Rated by Mercedes-Benz:                        463 HP @ 5,250-5,500rpm; 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-Maybach 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.


Dyno-Graph for Performance measured at the wheels:


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
TEL: 561.845.7888 FAX: 561.845.6777 E-MAIL: