Considering an ECU remap for your Mercedes-Benz S 400d 340hp? A Stage 1 remap can take this W222 - 2017 - 2019 diesel engine from 340 BHP to 410 BHP and from 700 Nm to 840 Nm of torque (turbocharged). This engine scores 7.5/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your Mercedes-Benz S can achieve.
The Mercedes-Benz S 400d 340hp is a 2.9L turbocharged diesel engine producing 340 BHP and 700 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 410 BHP and 840 Nm — a gain of around 70 BHP (21%) and 140 Nm (20%).
This engine scores highly for remap suitability, with a balanced spread of gains across both power and torque — providing a noticeable improvement across the rev range. The tuning headroom is classified as high, based on the percentage gain available from the factory output.
Considerations: High tuned torque: check transmission torque capacity and service history.
Fuel economy note: possible improvement with conservative driving.
All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method. We recommend discussing your specific vehicle with a qualified remap professional.
| Engine | BHP | Gain | Torque | Gain | Score |
|---|---|---|---|---|---|
| 350d 286hp | 286 → 380 | +94 | 600 → 800 | +200 | Excellent (8/10) |
| 450 - 367hp | 367 → 410 | +43 | 500 → 590 | +90 | Moderate (4.5/10) |
| 560 - 469hp | 469 → 570 | +101 | 700 → 820 | +120 | Moderate (5/10) |
| 63 AMG S 612hp | 612 → 690 | +78 | 900 → 950 | +50 | Limited (3.5/10) |
| 650 - 630hp | 630 → 690 | +60 | 1000 → 1100 | +100 | Limited (3.5/10) |
| 65 AMG 630hp | 630 → 690 | +60 | 1000 → 1100 | +100 | Limited (3.5/10) |
Get a personalised remap quote for your Mercedes-Benz S. We'll connect you with a trusted professional in your area.
All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method.
We recommend discussing your specific vehicle with a qualified remap professional before proceeding.
