Mercedes · Stage 1Published 2 January 2026

Mercedes-AMG C43 Stage 1 Engine Tune

A mobile Stage 1 calibration by MTechTuning, with dealer-level diagnostics before and after tuning.

Published vehicle figures

Stock

367hp

520Nm

Stage 1

420hp

620Nm

Difference

+53hp

+100Nm

Figures published for this vehicle. Results vary with model year, software, fuel and condition, so we confirm what suits your car before quoting.

Add-ons

Speed limiter off

The results

From 367hp as standard to 420hp, the Mercedes-AMG C43 gained 53hp, roughly 14% more power.

Torque rose from 520Nm to 620Nm (+100Nm), which is what you feel most in everyday driving: stronger pull from low revs and easier overtaking.

What the work involved

This was a Stage 1 calibration: no hardware changes, just carefully refined engine software. Boost, fuelling, timing and torque limits are adjusted within safe margins for more usable performance every day.

How we carried it out

Diagnostic scan for stored faults before any work
Stabilised power supply connected while programming
Original software read and saved, so the car can be returned to standard
Calibration written, then the car checked again afterwards

Thinking about the same for your Mercedes-Benz?

We come to you from our Weston-super-Mare base, across Bristol, Somerset, Gloucestershire, Wiltshire, South Wales and parts of Devon and Dorset. Results depend on the exact car, so we confirm what suits yours before quoting.

Mercedes-Benz tuning Check your gains

Mercedes-AMG C43 Stage 1 Engine Tune photographed by MTechTuning

Dealer-level diagnostics before and after
Fully mobile, at home or work
Lifetime software warranty and support
14-day money-back guarantee

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