Renntech Ecu Upgrade | Hand Held Tuner | Hht | 550/560 | M176 – 4.0L V8 Biturbo | Single-Scroll

SKU: ECU-TU.54.176.SI Category:

$3,298.90 inc. GST

is available on purchases between $10 and $2,000 learn more

Please call us to confirm stock 1800 990 001 before checkout


RENNtech HHT (hand held tuner) allows you the unlimited ability to switch between tuned and stock ECU programming and requires no ECU removal!

Our proprietary tuning module stores both the RENNtech tuned file and 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 reflashed at any time as many times as you wish.

The RENNtech tuning software for Mercedes offers significant gains in horsepower and torque across the vehicles entire power band. By modifying ignition timing and throttle mapping, optimizing air/ fuel ratios, increasing the engines rev limiter and modifying boost mapping for turbo charged vehicles, RENNtech performance software unleashes your Mercedes true potential.

RENNtech has been at the forefront of ECU tuning since electronic engine management started to show up in vehicles during the mid 1980’s! Our experience, countless hours of in house research, development and exhaustive testing ensure that our proprietary ECU upgrade offers incredible performance gains and rock solid daily driver reliability.

Our intermediate level ECU upgrade offers huge gains in performance across the entire RPM range without sacrificing around town comfort or daily driver reliability.

This is ideal for customers who want increased performance in their daily driver without worry of extra strain on driveline components or for areas and countries with extreme altitudes, temperatures or fuel quality concerns.

This is a slight reduction from our standard tune but still offers white knuckle performance at one of the most affordable price points in the tuning market.

Our intermediate ECU Upgrade is also developd for customer that drive their car mainly in regions where only 91 Octane fuel is available.


  • 17-Digit VIN Number of vehicle is mandatory in order to program RENNtech HHT. Please send with order.
  • Please select applicable Octane/Fuel rating used in your vehicle/region at checkout.

Available for:

  • M176 | 4.0L V8 BiTurbo | Single Scroll Engine
  • S-Class
    • W222 – S 560 4MATIC Sedan | MY 18+ (Click for Performance Details)
  • S-Class Coupe
    • C217 – S 560 4MATIC Coupe | MY 18+ (Click for Performance Details)
  • Maybach
    • W222 – S560 Mercedes-Maybach | MY 18+ (Click for Performance Details)
  • G-Class
    • W463 – G 550 | MY 16+ (Click for Performance Details)
    • W463 – G 550 4×4? | MY 17-18 (Click for Performance Details)


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