Considering an ECU remap for your Mercedes-Benz GLS 350d 258hp? A Stage 1 remap can take this 2015 - 2018 diesel engine from 258 BHP to 290 BHP and from 620 Nm to 690 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 GLS can achieve.
Comparisons are calculated from our own recorded Stage 1 figures.
The Mercedes-Benz GLS 350d 258hp is a 3.0L turbocharged diesel engine producing 258 BHP and 620 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 290 BHP and 690 Nm — a gain of around 32 BHP (12%) and 70 Nm (11%).
This engine has moderate 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 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 |
|---|
| 400 (3.0T) 333hp | 333 → 400 | +67 | 480 → 580 | +100 | Good (7.5/10) |
| 500 (4.7 V8 TT) 455hp | 455 → 500 | +45 | 700 → 850 | +150 | Moderate (5/10) |
| 63 AMG 585hp | 585 → 635 | +50 | 760 → 935 | +175 | Moderate (5/10) |
Get a personalised remap quote for your Mercedes-Benz GLS. 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.
