Mercedes S-class S 450 340(+05)
Engine Remapping in Bath
Mercedes S-class S 450 340(+05) in Bath. 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-class S 450 340(+05): standard vs remapped
Petrol engine. Indicative stage 1 figures, fully dyno tested.
Power
+23 bhp · +7%- Standard340 bhp
- Remapped363 bhp
Torque
+40 Nm · +9%- Standard460 Nm
- Remapped500 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
Out of the box the Mercedes S-class S 450 340(+05) gives 340 bhp and 460 Nm. Remapped in Bath, we record 363 bhp and 500 Nm, so 23 bhp and 40 Nm more, or 7% and 9% respectively.
These are indicative figures for a petrol Mercedes S-class in good health. Your own results depend on the condition of the car.
Mercedes S-class S 450 340(+05) remap figures
- Fuel: Petrol
- Standard power: 340 bhp, remapped: 363 bhp (+23 bhp, +7%)
- Standard torque: 460 Nm, remapped: 500 Nm (+40 Nm, +9%)
- Service: stage 1 ECU remap, fully dyno tested
Petrol Mercedes S-class: what changes with a remap
Factory petrol calibrations leave margin for poor fuel and hot climates. A remap tunes the ignition, fuelling and boost maps to make better use of that margin, which shows up as livelier throttle response and stronger acceleration.
How the Mercedes S-class S 450 340(+05) compares
Among the 16 petrol S-class engines we have figures for, the S 450 340(+05) ranks 12th for power gain, 9 bhp below the S-class petrol average of 32 bhp.
Across our whole catalogue the average petrol remap adds 27 bhp and 51 Nm, so this engine's 23 bhp and 40 Nm sits below that benchmark.
Book vehicle tuning for your Mercedes S-class in Bath
Remap Experts has a dedicated Bath site, so you deal with a local team backed by a national network. We regularly work with drivers in Midsomer Norton, Westbury, Swindon, Radstock and Melksham and nearby areas of the South West.
All our remaps are fully dyno tested, backed by a 30 day money back guarantee and covered by a lifetime software warranty. Request a quote online or call 0800 779 7864.
If you are closer to Bristol, Somerset and Southampton, those neighbouring Remap Experts sites can help too.

Get a quote for your Mercedes S-class S 450 340(+05)
Send your registration and we will confirm the exact remap, the price and the next available slot.
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 400 CDI 279(+99)diesel
- Mercedes S 430 279 BIS 98(-99)petrol
- Mercedes S 430 279(+99)petrol
- Mercedes S 500 306(+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