Mercedes-Benz CLS C257 - 2018 - 2020 400d (3.0D) 340hp
Real standard and upgraded performance figures for the 400d (3.0D) 340hp engine in the Mercedes-Benz CLS C257 - 2018 - 2020.
Standard vs. upgraded performance for the Mercedes-Benz CLS C257 - 2018 - 2020 400d (3.0D) 340hp, based on real files we've processed for this exact engine.
| Horsepower (HP) | Torque (Nm) | |
|---|---|---|
| Standard | 340 | 700 |
| Stage 1 | 380 | 820 |
| Stage 2 | 400 | 880 |
- Make
- Mercedes-Benz
- Model
- CLS
- Generation
- C257 - 2018 - 2020
- Engine
- 400d (3.0D) 340hp
- Fuel type
- Turbo-Diesel
Frequently asked questions
Is Stage 1 tuning safe for the Mercedes-Benz CLS C257 - 2018 - 2020 400d (3.0D) 340hp?
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 400d (3.0D) 340hp make after tuning?
Standard output is 340 HP / 700 Nm; Stage 1 on this engine typically reaches 380 HP / 820 Nm. Exact results can vary slightly with fuel quality and vehicle condition.
How long does a Mercedes-Benz CLS C257 - 2018 - 2020 400d (3.0D) 340hp 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 400d (3.0D) 340hp 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.