Expected gains of +40 BHP and +120 Nm torque
Get Your Free Quote ↓Considering an ECU remap for your Mercedes-Benz CLS 400d (3.0D) 340hp? A Stage 1 remap can take this C257 - 2018 - 2020 diesel engine from 340 BHP to 380 BHP and from 700 Nm to 820 Nm of torque (turbocharged). This engine scores 6.5/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your Mercedes-Benz CLS can achieve.
Comparisons are calculated from our own recorded Stage 1 figures.
The Mercedes-Benz CLS 400d (3.0D) 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 380 BHP and 820 Nm — a gain of around 40 BHP (12%) and 120 Nm (17%).
This engine has moderate remap suitability, with gains weighted towards torque — you will notice the difference most strongly in mid-range pulling power and in-gear acceleration. The tuning headroom is classified as moderate, 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 |
|---|---|---|---|---|---|
| 220d (2.0D) 194hp | 194 → 220 | +26 | 400 → 460 | +60 | Good (6.5/10) |
| 300d (2.0D) 245hp | 245 → 270 | +25 | 500 → 560 | +60 | Good (6.5/10) |
| 350d (3.0D) 286hp | 286 → 380 | +94 | 600 → 800 | +200 | Excellent (8/10) |
| 350 (2.0T) 299hp | 299 → 350 | +51 | 400 → 470 | +70 | Good (7/10) |
| 450 (3.0T) 367hp | 367 → 420 | +53 | 500 → 600 | +100 | Good (7/10) |
| 450 (3.0T) 389hp | 389 → 420 | +31 | 500 → 600 | +100 | Good (6/10) |
| 53 AMG 435hp | 435 → 460 | +25 | 520 → 620 | +100 | Moderate (4.5/10) |
Get a personalised remap quote for your Mercedes-Benz CLS. 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.