RENNNtech ECU+ Upgrade for Mercedes C167 GLE 63 S AMG BiTurbo EQ Boost 2021-2025
The RENNtech HHT allows you to switch effortlessly between tuned and stock ECU programming without removing the ECU. This proprietary tuning module stores both your vehicle"™s stock file and RENNtech"™s performance-tuned file, delivering instant power upgrades with just a few minutes of programming via the OBD2 port. Reflash as often as you like"”unlimited tuning flexibility at your fingertips.
Performance Gains "“ GLE 63 S AMG EQ Boost (MY2021+)
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Peak Crank HP:Â 745 HP (+97 HP over stock)
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Peak Crank TQ:Â 767 LB-FT (+54 LB-FT over stock)
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Wheel HP (16% drivetrain loss):Â 618 WHP
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Wheel TQ:Â 637 WTQ
Key Features & Notes
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Plug-and-Play Tuning "“ No ECU removal required; flash via OBD2 in minutes.
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Unlimited Switching "“ Swap between stock and tuned maps anytime.
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Higher Real-World Stock Power "“ Dyno tests show 648 HP / 713 LB-FT (vs. Mercedes"™ claimed 603 HP / 627 LB-FT).
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93+ Octane Required "“ Maximum performance depends on fuel quality.
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Lower Power Maps Available "“ For regions with poor fuel quality (call for details).
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Race Fuel Options "“ Further optimize performance with high-octane fuel.
Why RENNtech"™s Numbers Differ from Factory Ratings
Mercedes-Benz publishes averaged power figures over a broad RPM range, while RENNtech measures peak performance on the dyno. This explains why stock dyno results exceed factory claims"”and why tuning gains are calculated from real-world baselines.
Dyno-Graph for Performance measured at the wheels:
Unlock your AMG"™s true potential"”with RENNtech"™s proven ECU upgrade!
Fitment Chart:
| Make |
Model |
Year |
Mercedes
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GLE 63 AMG BiTurbo EQ Boost
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2021-2025
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⚠️ California Proposition 65 Warning:
This product may expose you to chemicals known to the State of California
to cause cancer or reproductive harm.
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