Mercedes-Benz S W221 - 2005 - 2013 420 CDI 320hp
Real standard and upgraded performance figures for the 420 CDI 320hp engine in the Mercedes-Benz S W221 - 2005 - 2013.
Standard vs. upgraded performance for the Mercedes-Benz S W221 - 2005 - 2013 420 CDI 320hp, based on real files we've processed for this exact engine.
| Horsepower (HP) | Torque (Nm) | |
|---|---|---|
| Standard | 320 | 730 |
| Stage 1 | 360 | 820 |
| Stage 2 | 380 | 865 |
- Make
- Mercedes-Benz
- Model
- S
- Generation
- W221 - 2005 - 2013
- Engine
- 420 CDI 320hp
- Fuel type
- Turbo-Diesel
Frequently asked questions
Is Stage 1 tuning safe for the Mercedes-Benz S W221 - 2005 - 2013 420 CDI 320hp?
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 420 CDI 320hp make after tuning?
Standard output is 320 HP / 730 Nm; Stage 1 on this engine typically reaches 360 HP / 820 Nm. Exact results can vary slightly with fuel quality and vehicle condition.
How long does a Mercedes-Benz S W221 - 2005 - 2013 420 CDI 320hp 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 420 CDI 320hp 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.