AMR ECU UPGRADE | 2019-2021 | CLS53 | C257 | 3.0T

$2,499.99

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Availability: Ships in 24 hours
Calibration Code: AMR.C257.M256.CAL
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Description

Application:
  • Make: Mercedes-Benz
  • Model: CLS53 AMG
  • Chassis: C257
  • Platform: M256.930

Power Gains:
  • 2019-2021 Factory Stock Rating: 429hp / 384tq (factory advertised power rating)
  • Stage 1 Performance: up to 544hp / up to 529tq (octane & environment depending – 2019+ Vehicles see *Note below)
  • *Note: For vehicles manufactured from 2019 onward, the advertised power increases are limited by the factory CPC. To fully achieve the advertised performance, our CPC upgrade is required. Expected HP without CPC upgrade will result in gains that are 1/2 the advertised gain rating above. Click here to see CPC upgrade

Octane(s) Available:
  • 91 Octane
  • 93 Octane
  • 95 Ron (euro)
  • 98 Ron (euro)

AMR Performance Enhancement Features:
  • Optimized Fuel Mapping
  • Optimized Timing Curve
  • Improved Fuel Efficiency
  • Broader & Stronger Power Band
  • Lower RPM Hesitation Eliminated
  • Increased Turbocharger Response
  • In-House Engineered & Tested Results
  • Smoother Firmer Transmission Shift Patterns

Notes:

  • AMR Performance has found that the “53” vehicles (M256 engine platform) stock power numbers vary from the power numbers claimed by Mercedes-Benz (Mercedes-AMG). 
  • ALL power gains are calculated based on stock numbers measured by AMR Performance. 
  • Our numbers will be dependent on vehicle conditions, climate conditions, environment conditions, dynamometer settings (if used) and fuel quality. 

Additional information

Weight5 lbs
Dimensions12 × 12 × 4 in