BHP+70 hp (21%)
Standard
340 hp
Tuned
410 hp
Torque+140 Nm (20%)
Standard
700 Nm
Tuned
840 Nm
Suitability
Good (7.5/10)Gains Profile
BalancedHeadroom
HighMercedes-Benz S 400d 340hp ECU Remapping
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.
How this engine compares
- 10thof 43 Mercedes-Benz S engines by power gain
- 92%of the 9,842 engines we hold gain data for see a smaller power increase
- 91%of engines with torque data see a smaller torque increase
Comparisons are calculated from our own recorded Stage 1 figures.
Assessment
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.
Considerations
!High tuned torque: check transmission torque capacity and service history.
Other S W222 - 2017 - 2019 Engines
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