Mercedes S 400 CDI 279(+99)
Remapping in Belfast
Mercedes S 400 CDI 279(+99) in Belfast. 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 S 400 CDI 279(+99): standard vs remapped
Diesel engine. Indicative stage 1 figures, fully dyno tested.
Power
+27 bhp · +10%- Standard279 bhp
- Remapped306 bhp
Torque
+37 Nm · +9%- Standard400 Nm
- Remapped437 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
Remapping for the Mercedes S 400 CDI 279(+99) in Belfast takes it from 279 to 306 bhp and from 400 to 437 Nm in our stage 1 figures: +27 bhp (10%) and +37 Nm (9%).
The figures above are estimates for a standard, well-maintained Mercedes S-class diesel; they are not a guarantee of any particular result.
Mercedes S 400 CDI 279(+99) remap figures
- Fuel: Diesel
- Standard power: 279 bhp, remapped: 306 bhp (+27 bhp, +10%)
- Standard torque: 400 Nm, remapped: 437 Nm (+37 Nm, +9%)
- Service: stage 1 ECU remap, fully dyno tested
What a remap does for a diesel Mercedes S-class
The gains from remapping a diesel come from the engine management software rather than new parts: injection, boost and torque limits are re-mapped, which is why torque improves most and why the car often feels easier to drive at lower revs.
For reference, CDI is the Mercedes-Benz name for its common-rail diesel engines.
How the Mercedes S 400 CDI 279(+99) compares
Of the 7 diesel S-class engines in our data, this one comes 7th for power gain, which is 10 bhp below the S-class diesel average of 37 bhp.
Across our whole catalogue the average diesel remap adds 34 bhp and 73 Nm, so this engine's 27 bhp and 37 Nm sits below that benchmark.
Mercedes S-class ECU tuning in Belfast
Remap Experts has a dedicated Belfast site, so you deal with a local team backed by a national network. We regularly work with drivers in Holywood, Newtownabbey, Millisle, Lisburn and Dunmurry and nearby areas of Northern Ireland.
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 Glasgow, Scotland and Carlisle, those neighbouring Remap Experts sites can help too.

Ready for remapping on your Mercedes S-class in Belfast?
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 S-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.
Same model
Other S-class engines
- Mercedes S 300 TD 177(-99)diesel
- Mercedes S 300(-99)petrol
- Mercedes S 320 224 BIS 98(-99)petrol
- Mercedes S 320 224(+99)petrol
- Mercedes S 320 CDI 197(+99)diesel
- Mercedes S 320 CDI 204(+99)diesel
- Mercedes S 350 245(+99)petrol
- Mercedes S 350 TD(-99)diesel
- Mercedes S 430 279 BIS 98(-99)petrol
- Mercedes S 430 279(+99)petrol
- Mercedes S 500 306(+99)petrol
- Mercedes S 55 AMG 612(+99)petrol
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