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A front view of Renntech Hand held tuner on the right side with the renntech logo in its grey and red color and ECU Upgrade written on the left side of the picture with white background }
For any questions please PM or email: Online@AutoTalent.com RENNNtech ECU Hand Held Tuner | HHT | for Mercedes...
Vendor: RennTech
SKU: ECU:54.217.S65BT
Product Type: Performance
Regular price
$3,495.00
Regular price
Sale price
$3,495.00
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RENNtech ECU Hand Held Tuner | HHT | for Mercedes S65 AMG | M279 6.0L V12 BiTurbo 2015-2024
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For any questions please PM or email: Online@AutoTalent.com

RENNNtech ECU Hand Held Tuner | HHT | for Mercedes S65 AMG | M279 6.0L V12 BiTurbo 2015-2024

RENNtech HHT (Hand Held Tuner) for Mercedes-Benz

Unlock the full potential of your Mercedes-Benz with the RENNtech HHT, a portable and user-friendly solution that allows for unlimited switching between stock and tuned ECU programming. With no ECU removal required, tuning your car has never been this easy or flexible.


Key Features:

  • Unlimited switching between stock and RENNtech-tuned ECU files.
  • Plug-and-play via the OBD2 port—no need for complex installations or ECU removal.
  • Instant tuning: Programming takes only a few minutes, and the vehicle can be reflashed any time, as many times as you like.
  • Proprietary tuning software: The module stores both the original stock file and the high-performance RENNtech file.
  • Significant performance gains: RENNtech tuning enhances horsepower, torque, and overall responsiveness.
  • No compromise on reliability: The tuning delivers a smooth, daily driver experience, backed by decades of ECU tuning expertise.

Performance Gains:

By optimizing air/fuel ratios, adjusting ignition timing, and modifying boost mapping for turbocharged vehicles, the RENNtech ECU software increases power and torque across the entire powerband.

For Mercedes-Benz M275 65 AMG 6.0L V12 BiTurbo (S-W221 | CL-C216 | SL-R230):

  • Stock:
    • 621 HP @ 5500 RPM
    • 738 lb-ft torque @ 2000-3000 RPM
  • Modified:
    • 670 HP @ 5500 RPM
    • 840 lb-ft torque @ 3500 RPM

Important Notes:

  • 17-Digit VIN is mandatory for programming the RENNtech HHT. Ensure to send this with your order for proper configuration.

    Fitment Chart:

    Make Model Year
    Mercedes
    S65 AMG Coupe
    2015-2024
    Mercedes S65 AMG Convertible 2016-2024
    Mercedes S65 AMG Sedan 2015-2024

     

      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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