RENNtech logo NEW small v2b

RPM ECU-Upgrade | Mercedes-AMG SL 55 | R232 | 4.0 L BiTurbo | 579 HP | 664 LB-FT

RENNtech Power Module ECU-Upgrade for Mercedes-AMG SL 55 | R232 | 4.0 L BiTurbo w/ EQ Boost | M177 | 579 HP & 664LB-FT
SKU: 54.177.RPM.55
Renntech Piggyback ECU Tuner Renntech Piggyback ECU Tuner
Retail price without tax: $3,280.00
Renntech Piggyback ECU Tuner
Renntech Piggyback ECU Tuner
Renntech Piggyback ECU Tuner
Renntech Piggyback ECU Tuner

Online Store Button

RENNtech Power Module (RPM) ECU -tune increases horsepower and torque across the entire power band. By modifying ignition timing, throttle mapping, optimizing air-to-fuel-ratios of the 4.0-liter BiTurbo V8 -engine (M177) found in the Mercedes-AMG SL-series of vehicles.

The RPM is contained in a CNC machined 6061 aluminum case with pre-labeled wires and connectors. The RPM comes with a bypass that can be installed in place of the module for quickly turning the vehicle back to stock. The harness can be uninstalled for returning the vehicle back to stock.

Through our 30+ years of ECU tuning experience, countless hours of in-house R&D, and long-term testing the RPM ECU upgrade offers the best in quality, performance, and reliability. 

From the factory, the SL 55 AMG is delivered with 489 HP and 582 TQ. With the RENNtech RPM, the performance numbers go up to 579 HP and 700 TQ, gaining up to +90 HP and +106 TQ.


Performance Numbers Overview 


Mercedes-AMG SL 55 (MY2022+ | R232 | M177 | 4.0L V8 BiTurbo) Stock Performance (at crank):

  • Rated by Mercedes-Benz (avg.):                        469 HP @ 5,500-6,250rpm; 516 LB-FT @ 2,250-4,500rpm
  • Dyno measured by RENNtech (peak):               489 HP @ 4,900rpm; 582 LB-FT @ 3,400rpm
    • Note: Mercedes M177 engine performance when measured on the dyno obtains higher power numbers than rated from factory. Performance numbers published by MBUSA are a calculated average within a specific rpm range, which obviously result  in lower power numbers than at the peak. HP and TQ gains calculated by RENNtech are always based on peak stock results measured by RENNtech and upgraded peak results measured by RENNtech.

Mercedes-AMG SL 55 (MY2022+ | R232 | M177 | 4.0L V8 BiTurbo)  Modified Performance:

  • Rated by RENNtech (peak @crank):              579 HP @ 5,050rpm; 664 LB-FT @ 3,350rpm
  • Rated by RENNtech (peak @wheel):              486 whp @ 5,750rpm; 558 wtq @ 3,350rpm
    • Crank Performance Numbers are calculated with a 16% Drivetrain loss on 4MATIC+ vehicles.

For detailed explanation on crank HP, wheel HP, drivetrain loss, etc. please click here.


Contact us

7825 SW Ellipse Way, Stuart, FL 34997
(+1) 561 - 845 7888
Mon - Fri 9am - 6pm


© 2017 RENNtech, Inc. All Rights Reserved.
7825 SW Ellipse Way - Stuart, FL 34997
TEL: 561.845.7888 FAX: 561.845.6777 E-MAIL: