Mercedes G 400 CDI 250
Remapping in Northampton
Mercedes G 400 CDI 250 in Northampton. Standard and remapped figures for this exact engine.

- Fully dyno tested remaps
- 30 day money back guarantee
- Lifetime software warranty
- UK-wide local network
Remap stats
Mercedes G 400 CDI 250: standard vs remapped
Diesel engine. Indicative stage 1 figures, fully dyno tested.
Power
+40 bhp · +16%- Standard250 bhp
- Remapped290 bhp
Torque
+75 Nm · +13%- Standard560 Nm
- Remapped635 Nm
Tuning figures are indicative estimates, not guaranteed results. Actual results depend on the condition of the vehicle.
Prices from £130
Fully dyno tested | 30 day money back guarantee | Lifetime software warranty
Owners of the Mercedes G 400 CDI 250 in Northampton can expect a stage 1 remap to take it from 250 to 290 bhp and from 560 to 635 Nm, an extra 40 bhp (16%) and 75 Nm (13%).
The figures above are estimates for a standard, well-maintained Mercedes G-class diesel; they are not a guarantee of any particular result.
Mercedes G 400 CDI 250 remap figures
- Fuel: Diesel
- Standard power: 250 bhp, remapped: 290 bhp (+40 bhp, +16%)
- Standard torque: 560 Nm, remapped: 635 Nm (+75 Nm, +13%)
- Service: stage 1 ECU remap, fully dyno tested
Diesel Mercedes G-class: what changes with a remap
On a diesel the ECU decides how much fuel is injected and how hard the turbo works. A remap adjusts those calibrations within safe limits, so the gains show up mainly as extra torque low in the rev range and smoother, more responsive pull.
For reference, CDI is the Mercedes-Benz name for its common-rail diesel engines.
How the Mercedes G 400 CDI 250 compares
Of the 4 diesel G-class engines in our data, this one comes 1st for power gain, which is 4 bhp above the G-class diesel average of 36 bhp.
Across our whole catalogue the average diesel remap adds 34 bhp and 73 Nm, so this engine's 40 bhp and 75 Nm sits at or above that benchmark.
Mercedes G-class vehicle tuning in Northampton
Based around Northampton, our team serves local drivers as part of the nationwide Remap Experts network. We regularly work with drivers in Newport Pagnell, Towcester, Silverstone, Rushden and Market Harborough and nearby areas of the East Midlands.
Each remap is dyno tested before it is signed off, and is protected by a 30 day money back guarantee and a lifetime software warranty. Ask for a quote online or by phone.
If you are closer to Leicester, Milton Keynes and Coventry, those neighbouring Remap Experts sites can help too.

Get a quote for your Mercedes G 400 CDI 250
Tell us about your car and we will come back with a quote by SMS or phone.
Included
What we can do for your Mercedes G-class
Stage 1 ECU remap
Add power and torque and improve driveability. Software only, tailored to your engine.
ECU repair and testing
Is your engine control unit playing up? We can arrange testing and repair, and source replacement ECUs.
DPF and EGR fault repair
Persistent DPF or EGR errors diagnosed and resolved in accordance with all current road-legal standards.
Engine carbon cleaning
Fault finding and carbon cleaning for the inside of your engine, typically completed in a couple of hours.
From quote to remapped in four steps
No jargon and no pressure. Here is exactly what happens.
- 01
Find your vehicle
Choose your make, model and engine to see the standard and remapped power and torque for your car.
- 02
Request a quote
Send your details and we contact you by SMS or call back with a quote. No obligation.
- 03
Book with your local site
Your local Remap Experts site arranges the remap and answers any questions about your car.
- 04
Remapped and dyno tested
Your remap is fully dyno tested, with a 30 day money back guarantee and a lifetime software warranty.
Everything you need to know
Plain-English guides to how remapping works, what it does and what to check first.
- 6 min read
What is ECU remapping?
The engine control unit, what a remap changes, and who it suits.
Read guide - 5 min read
The benefits of ECU remapping
More torque, better driveability and the potential for better economy.
Read guide - 6 min read
How ECU remapping works, step by step
From reading the original software to the dyno test.
Read guide