RENNtech Hand-Held Tuner ECU+ Upgrade for GLS 600 Maybach | X167 | M177 4.0L V8 Biturbo | 4MATIC | 93+ Octane Only

ECU+ Upgrade | Up to 622HP / 627 LB-FT | Gains: +63 HP & +49 LB-FT

RENNtech HHT (Hand Held Tuner) gives you the ability to switch between tuned and stock ECU programming without removing the ECU from the vehicle.

RENNtech’s proprietary tuning module contains both the tuned file and your vehicle’s original stock file. The module plugs directly into the OBD2 port and delivers the selected calibration directly to the ECU. Programming takes only a few minutes, and the vehicle can be reflashed between the tuned and stock files whenever desired.

With the proprietary RENNtech ECU+ Upgrade, the X167 GLS 600 Maybach | M177 4.0L V8 BiTurbo | 4MATIC can gain up to +63 HP and +49 LB-FT, based on performance numbers measured by RENNtech.

The maximum performance achieved with the RENNtech ECU+ Upgrade is:

622 HP @ crank
627 LB-FT @ crank

Notes:

• Stock and modified performance figures are based on measurements and calculations performed by RENNtech.
• Power gains are calculated based on the stock performance figures measured by RENNtech.
• Performance numbers will vary depending on vehicle condition, environmental conditions and fuel quality.
• 93+ Octane gasoline is mandatory with this Performance Upgrade.
• Certain states are known to have lower fuel quality. Vehicles located in these areas may require a lower-power calibration. Please contact RENNtech for details and available options.
• State restrictions may apply. Please contact RENNtech before purchasing to confirm availability for your location.

For questions regarding fuel requirements, state restrictions or available calibrations, please contact RENNtech at +1-561-845-7888.

GLS 600 Maybach (X167 | M177 | 4.0L V8 BiTurbo | 4MATIC) — Stock Performance

• RENNtech Stock Crank Performance: 559 HP / 582 LB-FT

GLS 600 Maybach (X167 | M177 | 4.0L V8 BiTurbo | 4MATIC) — RENNtech ECU+ Performance

• RENNtech Crank Performance: 622 HP / 627 LB-FT
• Gain: +63 HP / +49 LB-FT