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  • RENNtech Stage II Turbo Upgrade | W213 | E 53 AMG | 540HP/515TQ | 3.0L I6 Turbo EQ Boost | M256 | MY2018+ - mbenzgram
  • RENNtech Stage II Turbo Upgrade | W213 | E 53 AMG | 540HP/515TQ | 3.0L I6 Turbo EQ Boost | M256 | MY2018+ - mbenzgram
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RENNtech Stage II Turbo Upgrade | W213 | E 53 AMG | 540HP/515TQ | 3.0L I6 Turbo EQ Boost | M256 | MY2018+

SKU: PKG.09.256.1112
Regular price $7,780.00
Regular price Sale price $7,780.00


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Includes Turbo Upgrade, and ECU Upgrade. Gains: Up to +104HP | +105LB-FT

RENNtech Stage II Turbo upgrade for the E 53 AMG -series M256 engine.

RENNtech has been at the forefront of ECU tuning for over 30 years. Through our experience, countless hours of in-house Research & Development, and extensive testing we ensure that all RENNtech Performance upgrades offer incredible performance gains as well as rock-solid reliability.

The RENNtech Stage II Turbo -upgrade package for the Mercedes-Benz M256 -engine was developed to address and prevent possible turbo failures when increasing the power output of the AMG 53 M256 3.0 liter 6-cylinder engine. The Stage I and Stage II Turbo Upgrade -packages replace the standalone M256 ECU Performance Software which has been discontinued as a proactive measure.

With a strengthened turbo cartridge shaft, larger intake and exhaust impellers, and upgraded bearings the M256 Turbo upgrade is engineered to handle and deliver maximum power and torque. The use of new high quality, light weight components compensate for turbo lag despite their increased size. The impeller and turbine housings are precision CNC machined and flow tested in-house to fit the larger internal cartridge which is balanced as a complete assembly prior to installation.

The RENNtech Stage II M256 Turbo Upgrade isn’t just an OEM turbo charger with machined internals; but a dramatically larger, more powerful turbocharger capable increasing the power of the AMG 53 series. The result is nothing short of spectacular with gains up to 104 HP and 105 lb-ft, delivering up to 540 HP and 515 TQ with solid reliability and longevity.

Key Features:

  • The RENNtech Stage I Turbo Upgrade comes with an RENNtech ECU Upgrade.
  • Larger impeller (inlet)
  • Cartridge shaft is larger and stronger to support larger wheels
  • Entire cartridge is fine balanced as an assembly
  • Lightweight forged billet wheels
  • Less rolling resistance offers quicker spooling
  • Virtually no lag with impressive throttle response
  • Precision machined impeller and turbine housings
  • Up to 540 HP and 515 TQ @ crank


  • This Turbo Upgrade requires an additional core charge, which will be credited upon return of OEM turbo core to RENNtech
  • We have found the new M256 engine stock performance numbers vary from the baseline figures claimed by Mercedes Benz. We typically see higher baseline numbers than claimed by the factory. Numbers will be dependent on conditions and fuel quality.
  • Power gains are calculated with stock numbers measured by RENNtech
  • To reach the maximum power level, RENNtech downpipe, BOV adapters and high-flow air filters are required.
  • Published figures are dependent on conditions and fuel quality. 93+ Octane gasoline is mandatory with the Stage I and Stage II Turbo Performance Package.
  • States known for poor fuel quality have to be supplied with a lower power setup. Please call for details and Race fuel options +1-561-845-7888.
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