D-Sync Works
M256 (Gen 1) ECU Tune — 3.0T Inline-6
M256 (Gen 1) Stage 1 / Stage 2 OTS tune · 3.0T Inline-6 · flashed from your phone Available now
Stage 1 and Stage 2 OTS tunes for the Mercedes M256 (Gen 1) 3.0T Inline-6 engine family. Each supported car below links to its own page with exact stock, Stage 1 and Stage 2 figures.
| Car | Chassis | Years | Stock | Stage 1 | Stage 2 |
|---|---|---|---|---|---|
| AMG E 53 | W213 / C238 / A238 / S213 | 2018–2024 | 429 hp / 520 Nm | 500 hp / 650 Nm | 520 hp / 700 Nm |
| AMG CLS 53 | C257 | 2018–2021 | 429 hp / 520 Nm | 500 hp / 650 Nm | 520 hp / 700 Nm |
| AMG GT 53 4-Door | X290 | 2018–2024 | 429 hp / 520 Nm | 500 hp / 650 Nm | 520 hp / 700 Nm |
| AMG GLE 53 | W167 | 2019–2024 | 429 hp / 520 Nm | 500 hp / 650 Nm | 520 hp / 700 Nm |
| AMG GT 43 / 50 4-Door | X290 | 2018–2024 | 362 hp / 500 Nm | 500 hp / 650 Nm | 520 hp / 700 Nm |
| E 450 | W213 / C238 / A238 / S213 | 2021–2023 | 367 hp / 500 Nm | 500 hp / 650 Nm | 520 hp / 700 Nm |
| CLS 450 | C257 | 2018–2021 | 367 hp / 500 Nm | 500 hp / 650 Nm | 520 hp / 700 Nm |
| GLE 450 | W167 | 2019–2021 | 367 hp / 500 Nm | 500 hp / 650 Nm | 520 hp / 700 Nm |
| GLS 450 | X167 | 2020–2023 | 367 hp / 500 Nm | 500 hp / 650 Nm | 520 hp / 700 Nm |
| S 500 | W222 / W223 | 2017–2021 | 435 hp / 520 Nm | 500 hp / 650 Nm | 520 hp / 700 Nm |
All gains validated on real cars. Factory safety parameters preserved. · Requires a one-time Autotuner bench unlock before the first flash. We do not perform the unlock ourselves — Autotuner benches are common at performance shops worldwide, and any shop with one can do it.
How flashing works
After the one-time Autotuner bench unlock (we do not perform the unlock ourselves — Autotuner benches are common at performance shops worldwide, and any shop with one can do it), every tune is flashed over the OBD port from your phone: plug in the D-Sync D1 Wi-Fi dongle, open the D-Sync app, pick Stage 1 or Stage 2, and flash. Your factory calibration is saved automatically — revert to stock with one tap, anytime.
Stage 1 vs Stage 2 — what each needs
Stage 1 runs entirely on factory hardware — no supporting mods required — and also supports cars with an upgraded intake and improved cooling. Stage 2 requires a high-flow exhaust system; an upgraded intake and improved cooling are recommended alongside it. Each stage ships as two files calibrated separately for AKI 91 and AKI 93 fuel, plus a Stage 0 factory-power baseline — five OTS files per car, matched to your ECU software version after VIN verification in the app. European / Asian fuel grades: 95 RON → use the AKI 91 file; 98 / 100 RON → the AKI 93 file. Neither stage needs a transmission (TCU) tune — both are calibrated to run with the factory TCU.
Included with the OTS Mappack
DTC management during flash — select fault codes to manage right in the app before flashing (intended for closed-course use; vehicles on public roads must comply with local emissions regulations). Exhaust Burble Tuner (AMG models only) — adjustable pops & bangs with 13 in-app controls, included at no extra cost with every OTS Mappack purchase. Live data logging is part of the Flash & Log license. Vehicle coding functions (beta) are free for OTS customers.
What's in the package
- D-Sync D1 Wi-Fi OBD dongle — included, no other hardware needed (third-party ELM327-type dongles are not supported)
- Flash & Log license (one VIN) — flashing, high-speed data logging with CSV export, DTC scanning
- OTS Mappack license — Stage 1 and Stage 2, each as an AKI 91 and an AKI 93 file, plus the Stage 0 factory-power baseline: five files, all available from day one, no need to pick one stage at checkout
- Your Mercedes factory calibration — matched to your ECU software version, so you can return to stock with one tap at any time
- Exhaust Burble Tuner (AMG models) and DTC management — independent in-app controls, included free with the Mappack
- VIN binding and ECU verification in the app are free; after activation the app shows which file to flash
What you need: a phone with the D-Sync app and access to the car's OBD port. M256 cars need a one-time Autotuner bench unlock before the first OBD flash (not included).
Pricing & ordering
$900 USD — includes the license and the D-Sync D1 Wi-Fi dongle, covering one VIN. Free standard shipping to all supported regions.
Email your VIN to duke@yd-autogroup.com so we can confirm tune availability for your exact ECU version before you pay.
14-day returns on unactivated licenses · one VIN per license · free standard shipping to supported regions · checksums corrected automatically on every flash · one-tap revert to stock, anytime
Ordering & shipping
| Before you pay | Email your VIN to duke@yd-autogroup.com — we check your ECU software version first and usually reply within one business day. |
| US & Canada | Online checkout or PayPal; Canadian customers can also pay by Interac e-Transfer. |
| EU / UK / Australia / other supported regions | Order by email with your VIN; we send a PayPal invoice and PayPal converts to your currency automatically. |
| Shipping | Ships from Ontario, Canada by UPS / Canada Post. Standard shipping is free to supported regions; ask for an express upgrade when ordering. |
| Duties | Import duties or taxes, where they apply, are the recipient's responsibility. |
| After payment | Register on d-syncworks.com and tell us the account email — we activate the license on your VIN and send tracking, usually within one business day. |
Browse
All supported cars · Interactive catalog · About D-Sync Works