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. |
| All other countries | Order by email with your VIN; we send a PayPal invoice and PayPal converts to your currency automatically. |
| Shipping | Orders ship the day after they are placed — from our agent in Guangzhou for Mainland China and nearby regions, from Ontario, Canada for everywhere else. We ship worldwide: UPS by default to Europe and North America, EMS to Australia, and SF Express to Mainland China and nearby regions (Hong Kong, Macau, Taiwan, Japan, South Korea and Southeast Asia). For any other region, please email us before ordering. Delivery time depends on your region; standard shipping is free to the regions above — 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. |
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