Petrol Tuning · W176, W177
Mercedes A45 AMG Stage 1 Remap
The A45 is already one of the most highly strung four-cylinders ever sold, but there's still calibrated headroom in the standard hardware. Stage 1 sharpens throttle response and stretches the mid-range without touching engine protection.
Typical Stage 1 Gains
Power
+64 bhp
Torque
+65 Nm
Figures are typical results on a healthy, standard vehicle. Every car is calibrated individually, so your exact numbers depend on variant, condition and fuel.
ECU
Bosch MED17 / MG1
How we read it
Bench read/write on M139
Price
From £349 · 0% finance over 4 payments
What we do to your Mercedes A45 AMG
2.0 M133 / M139 turbo petrol
Custom file written to your ECU on the bench, original stored for a return to stock.
Boost, ignition and torque limiters calibrated together with knock and thermal protection fully active.
Shift behaviour matched so the DCT doesn't limit the new torque figure.
Pops and bangs / overrun crackle available
Gearbox tuning available alongside
Stage 2 for cars with downpipe or intake fitted
Lifetime warranty on our software, original file always stored, and no mechanical modifications required. Terms apply.
Mercedes A45 AMG Remap FAQs
Is it safe on the M139?
At stage 1 on a healthy, well-serviced engine, yes. Cooling and fuel quality matter on these — we'll talk you through it.
Does it need to be at the workshop?
Yes, bench jobs are workshop only. Allow three to four hours.
Can it be reversed?
Yes, we keep your original file.