The Mercedes-Benz A 45 AMG S 421hp (W177 – 2018 ->) produces 421 hp and 500 Nm in standard form. With Stage 1 software that rises to about 470 hp and 620 Nm: a gain of 49 hp (+12%) and 120 Nm (+24%).

This is a petrol engine with a displacement of 1,991 cc and engine code M139. The engine is controlled by the Bosch MG1CP002, the gearbox by the Siemens/Continental VGS3-NAG2. The software file can be written with tools such as Alientech K-TAG, Alientech KESS3, Autotuner, ByteShooter Toolbox, CMD CMDFlash and 3 more.

Besides Stage 1, the following options are available for this vehicle: DECAT, DTC Removal, START/STOP OFF, Pop & Bang Crackle map and Vmax.

Frequently asked questions

How much power and torque does a Mercedes-Benz A 45 AMG S 421hp gain with Stage 1?

About 49 hp and 120 Nm: from 421 hp / 500 Nm to roughly 470 hp / 620 Nm. The exact gain depends on engine condition and fuel quality.

Which ECU does a Mercedes-Benz A 45 AMG S 421hp use?

Bosch MG1CP002 (engine); Siemens/Continental VGS3-NAG2 (gearbox).

Which tools can read a Mercedes-Benz A 45 AMG S 421hp?

Alientech K-TAG, Alientech KESS3, Autotuner, ByteShooter Toolbox, CMD CMDFlash, MagicMotorsport Flex, Dimsport New Trasdata and bFlash.

Which extra options are available for a Mercedes-Benz A 45 AMG S 421hp?

DECAT, DTC Removal, START/STOP OFF, Pop & Bang Crackle map and Vmax.

Figures are indicative and vehicle specific. Check the regulations that apply in your country before modifying engine software.