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A front wide view of RENNtech ECU+ Upgrade for Mercedes C167 GLE 63 S AMG BiTurbo EQ Boost 2021-2025 with white background }
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For any questions please PM or email: Online@AutoTalent.com RENNNtech ECU+ Upgrade for Mercedes C167 GLE 63 S AMG...
Vendor: RennTech
SKU: ECU:54.167C.GLE63EQ
Product Type: ECU Upgrade
Regular price
$3,840.00
Regular price
Sale price
$3,840.00
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RENNtech ECU+ Upgrade for Mercedes C167 GLE 63 S AMG BiTurbo EQ Boost 2021-2025
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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+)

    • Peak Crank HP: 745 HP (+97 HP over stock)

    • Peak Crank TQ: 767 LB-FT (+54 LB-FT over stock)

    • Wheel HP (16% drivetrain loss): 618 WHP

    • Wheel TQ: 637 WTQ

    Key Features & Notes

    • Plug-and-Play Tuning – No ECU removal required; flash via OBD2 in minutes.

    • Unlimited Switching – Swap between stock and tuned maps anytime.

    • Higher Real-World Stock Power – Dyno tests show 648 HP / 713 LB-FT (vs. Mercedes’ claimed 603 HP / 627 LB-FT).

    • 93+ Octane Required – Maximum performance depends on fuel quality.

    • Lower Power Maps Available – For regions with poor fuel quality (call for details).

    • 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
    GLE 63 AMG BiTurbo EQ Boost
    2021-2025

     

      If you have any fitment questions, please feel free to reach out to our team via the contact methods below. If you are contacting us for any order status updates, please give us a call, or email us. We are a lean operation bringing you the best shopping experience possible. We are working on your orders as quickly as we can. We thank you for your patience.

      Call:
      Please reach out to us at (310) 231-0292 for sales inquiries if you are in the United States, Canada, Mexico.
      Email:
      For more in-depth product questions, fitment questions, product inquiries please email our performance specialists at online@autotalent.com.
      All other inquiries:
      Please direct your inquiries to the chat functionality on our website.

      Returns Policy

      If a product is ordered and not wanted, the UNUSED item can be returned for a 25% restocking fee unless otherwise specified. In some cases, we may offer the ability to return the item to us for a lesser restocking fee and then keep the balance as a store credit. To return an item, it must be in brand new condition with original packaging.

      We cannot accept a return on special ordered or custom items.

      Shipping is non refundable in either direction unless approved by AutoTalent. All items wanting to be return MUST be reported within 30 days of the original invoice date. No items will be returnable after 30 days. All products shipped from the AutoTalent facility are shipped via FedEx, USPS, or USPS. Some packages shipped from the manufacturer may or may not require signatures for package release.

      Special Order Items

      Some items may be special order specifically for the customer’s vehicle. These items generally require a deposit or paid in full. Once this deposit amount is notified to the customer and they agree to order the special order item, the deposit becomes non-refundable. These special order items cannot be returned or resold. Cancellations are not allowed on special order parts.

      AutoTalent DOES NOT REFUND SHIPPING CHARGES. If you modify, install, or alter the item in any form, we cannot accept it as a return. We will not cover any expenses related to the product or installation, and you may be required to purchase a replacement.

      ** All cancellations that are requested that are NOT due to items not being in stock or delayed by the manufacturer are subject to a 5% processing fee. When you place an order with us we pay credit card fees that are NOT returned back to us. We will absorb these fees if we do not have the item in stock OR if you agree to the original ETA and that ETA is NOT met. If you decide to cancel for any other reason you will not receive this 5% fee back

      Shipping

      We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

      When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

      Please also note that the shipping rates for many items we sell are weight-based.

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