
RENNtech HHT (Hand Held Tuner) is the number one ECU programmer for Mercedes-Benz and AMG. Do it yourself tuning, no ECU removal or mechanical modifications necessary!
RENNtech’s proprietary tuning module contains both the Tuned file as well as your vehicles Stock file. The module plugs directly into the OBD2 port and delivers the file you choose directly to the ECU. Programming takes only a few minutes and the vehicle can be re-flashed at any time as many times as you wish.
With the proprietary RENNtech ECU Tuning gains up to +68 HP and +120 LB-FT (13% increase), 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 GLS 580S EQ Boost+ is 592 HP and 704 LB-FT.
Notes:
Performance Numbers Overview
GLS 580 EQ Boost (MY2020+ | X167 | M177 | 4.0L V8 BiTurbo EQ Boost) Stock Performance (at crank):
GLS 580 EQ Boost (MY2021+ | X167 | M176 | 4.0L V8 BiTurbo EQ Boost) Modified Performance:
For detailed explanation on crank HP, wheel HP, drivetrain loss, etc. please click here. |
Dyno-Graph for Performance measured at the wheels:
Contact us |
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7825 SW Ellipse Way, Stuart, FL 34997
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(+1) 561 - 845 7888
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Mon - Fri 9am - 6pm
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