Mercedes S-Class ECU Remapping & Engine Tuning
We have remap figures for 23 Mercedes S-Class engines across three generations. Petrol engines gain +3% to +24% power and diesels +14% to +23%. The largest bhp increase is on the S-Class W222 S65 6.0 Biturbo: 621 to 703 bhp (+82 bhp, +13%). One more engine is in development. Book your S-Class in at our Burnley workshop on 01282 779 000, or find a local dealer.
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View FAQs| Generation | Years | Engines | Power gain | Largest gain |
|---|---|---|---|---|
| S-Class W220 | 2000–2005 | 5 | +5% to +18% | +36 bhp (+18%) S 320 3.2 Cdi |
| S-Class W221 | 2006–2013 | 11 | +3% to +23% | +62 bhp (+12%) S600 5.5 TwinTurbo |
| S-Class W222 | 2014–present | 8 | +10% to +24% | +82 bhp (+13%) S65 6.0 Biturbo |
| Mercedes S-Class W220 | Original BHP | Remapped BHP | Original Torque (Nm) | Remapped Torque (Nm) |
|---|---|---|---|---|
| S280 2.8 204 BHP 2000-2005 | 204 | 217 (+6%) | 270 | 290 (+7%) |
| S 320 3.2 Cdi 197 BHP 2000-2005 | 197 | 233 (+18%) | 470 | 560 (+19%) |
| S 320 3.2 Cdi 204 BHP 2000-2005 | 204 | 234 (+14%) | 500 | 570 (+13%) |
| S 320 3.2 224 BHP 2000-2005 | 224 | 237 (+5%) | 316 | 339 (+7%) |
| S 500 5.0 306 BHP 2000-2005 | 306 | 331 (+8%) | 460 | 495 (+7%) |
| Mercedes S-Class W221 | Original BHP | Remapped BHP | Original Torque (Nm) | Remapped Torque (Nm) |
|---|---|---|---|---|
| S300 3.0 Cdi 208 BHP 2006-2013 | 208 | 253 (+21%) | 500 | 572 (+14%) |
| S300 3.0 228 BHP 2006-2013 | 228 | 245 (+7%) | 300 | 322 (+7%) |
| S 320 3.0 Cdi 231 BHP 2006-2013 | 231 | 285 (+23%) | 540 | 642 (+18%) |
| S 350 3.0 255 CDI BHP 2006-2013 | 255 | 296 (+16%) | 620 | 699 (+12%) |
| S 350 3.5 268 BHP 2006-2013 | 272 | 297 (+9%) | 350 | 385 (+10%) |
| S400 Hybrid 3.5 295 BHP 2006-2013 | 295 | 305 (+3%) | 385 | 402 (+4%) |
| S 420 4.0 Cdi 320 BHP 2006-2013 | 320 | 365 (+14%) | 730 | 820 (+12%) |
| S 450 4.7 340 BHP 2006-2013 | 340 | 358 (+5%) | 460 | 485 (+5%) |
| S 500 5.5 388 BHP 2006-2013 | 388 | 410 (+5%) | 530 | 560 (+5%) |
| S600 5.5 TwinTurbo 510 BHP 2006-2013 | 510 | 572 (+12%) | 830 | 908 (+9%) |
| S 63 Amg 518 6.2 BHP 2006-2013 | 525 | 563 (+7%) | 630 | 675 (+7%) |
| Mercedes S-Class W222 | Original BHP | Remapped BHP | Original Torque (Nm) | Remapped Torque (Nm) |
|---|---|---|---|---|
| S320 3.0 Turbo 268 BHP 2014 - Present | 268 | 333 (+24%) | 400 | 490 (+22%) |
| S350 3.0 CDI 255 BHP 2014 - Present | 255 | 296 (+16%) | 620 | 692 (+11%) |
| S400 3.0 Turbo 329 BHP 2014 - Present | 329 | 387 (+17%) | 480 | 562 (+17%) |
| S500 4.6 Biturbo 449 BHP 2014 - Present | 449 | 496 (+10%) | 700 | 853 (+21%) |
| S550 4.6 Biturbo 449 BHP 2014 - Present | 449 | 496 (+10%) | 700 | 853 (+21%) |
| S560 4.0 Biturbo 469 BHP 2014 - Present | In Development | |||
| S63 5.5 Biturbo 577 BHP 2014 - Present | 577 | 645 (+11%) | 900 | 1022 (+13%) |
| S65 6.0 Biturbo 621 BHP 2014 - Present | 621 | 703 (+13%) | 1000 | 1150 (+14%) |
Frequently asked questions
How much power does a remap add to a Mercedes S-Class?
Petrol engines gain +3% to +24% power and diesels +14% to +23%. The full figures for each engine are in the tables above.
Which S-Class engine gains the most from a remap?
The S-Class W222 S65 6.0 Biturbo gains the most: 621 to 703 bhp (+82 bhp, +13%). Torque rises from 1000 to 1150 Nm (+14%).
Which S-Class generations do you have remap figures for?
We have figures for three generations: the S-Class W220 (2000–2005), S-Class W221 (2006–2013) and S-Class W222 (2014–present).
Are remaps available for every S-Class engine?
Not yet. One of the 24 engines listed above is still in development. Call our Burnley workshop on 01282 779 000 for an update.
Where can I get my S-Class remapped?
Book it in at our workshop in Burnley, Lancashire, on 01282 779 000, or find a local remap dealer in our dealer directory.
How we develop your remap
Our remaps are developed in-house at our facility in Lancashire, and cars are developed on our Dynojet 424xLC² dyno. Read more about dyno tuning at BHP UK.
Related:Petrol ECU tuning · Diesel ECU tuning · All Mercedes remaps · Mercedes ML-Class · Mercedes R-Class · Mercedes SL-Class · Mercedes SLC-Class
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