MRC’s ECU upgrade for the A45 is available globally in octane-specific variations. Locally 95 octane is the choice of fuel in South Africa. The process of flashing the ECU is conveniently done to the vehicle’s factory ECU through the OBD-II port without any physical modification to the factory ECU. Stages 1 and 2 are available. 

MRC has added AMG and A45 to our tuning catalogue due to high demand. Owing to MRC’s extensive knowledge on the Bosch ECU platform MRC is able to get the maximum reliable power out of the vehicle. 

Stage 1:

  • MRC ECU tune
  • Catless downpipe

Stage 2:

  • MRC ECU tune
  • MRC TCU tune
  • Catless downpipe
  • Cold-air intake
  • Upgraded charge cooler
  • Turbo DV


  • Tested under various climates and driving conditions globally via MRC’s 25-Global Dealer Network
  • Drivability and throttle responsiveness optimised 
  • Retention of Factory Safety Limiters
  • Perfectly optimised Power Band and Power Delivery utilising full control of ECU
  • Improved Fuel Economy
  • Speed Limiter removed (On request)
  • Race fuel maps (Available on request)  
  • Specific stage maps designed to extract maximum power from the car’s engine—reliably
  • Maps available for Stages 1 and 2