Mercedes-Benz A W177 - 2018 -> 45 AMG S 421hp
Real standard and upgraded performance figures for the 45 AMG S 421hp engine in the Mercedes-Benz A W177 - 2018 ->.
The Mercedes-Benz A W177 - 2018 -> 45 AMG S 421hp is one of the engines we work on regularly — here's what a stage remap typically changes for it.
| Horsepower (HP) | Torque (Nm) | |
|---|---|---|
| Standard | 421 | 500 |
| Stage 1 | 470 | 620 |
| Stage 2 | 494 | 680 |
- Make
- Mercedes-Benz
- Model
- A
- Generation
- W177 - 2018 ->
- Engine
- 45 AMG S 421hp
- Fuel type
- Turbo-Petrol
Frequently asked questions
Is Stage 1 tuning safe for the Mercedes-Benz A W177 - 2018 -> 45 AMG S 421hp?
Yes — Stage 1 for this engine is a software-only remap calibrated to stay within its stock mechanical limits (turbo, clutch, fueling), so no hardware changes are required.
How much more power does the 45 AMG S 421hp make after tuning?
Standard output is 421 HP / 500 Nm; Stage 1 on this engine typically reaches 470 HP / 620 Nm. Exact results can vary slightly with fuel quality and vehicle condition.
How long does a Mercedes-Benz A W177 - 2018 -> 45 AMG S 421hp remap take?
Once your original file is uploaded through the member panel, most requests for this engine are completed within a few hours.
Can the 45 AMG S 421hp be reverted to its original file?
Yes — we keep the original file on record for the request, so the ECU can be put back to stock at any time.