D-Sync Works
Mercedes E400 (W212) ECU Tune & Remap — Stage 1 / Stage 2
E 400 · Stage 1 / Stage 2 OTS ECU remap · flashed over OBD from your phone · $799 USD Available now
The E 400 (W212 / W213 / C207 / A207 / C238 / A238), 2013–2018, runs the Mercedes M276 3.0T V6 Biturbo engine. Our Stage 1 OTS remap takes it from 328 hp / 480 Nm to 450 hp / 600 Nm (+122 hp / +120 Nm), and Stage 2 pushes it to 480 hp / 650 Nm (+152 hp / +170 Nm).
| Power / Torque | Gain vs stock | |
|---|---|---|
| Stock | 328 hp / 480 Nm | — |
| Stage 1 | 450 hp / 600 Nm | +122 hp / +120 Nm |
| Stage 2 | 480 hp / 650 Nm | +152 hp / +170 Nm |
All gains validated on real cars. Factory safety parameters preserved. · AMG 43-series $839 · non-AMG 400 / 450 models $799.
How flashing works
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. No laptop, no bench, no shipping your ECU. 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.
Pricing & ordering
$799 USD — includes the license and the D-Sync D1 Wi-Fi dongle, covering one VIN. Free standard shipping to all supported regions.
Buy Now — US & CanadaOrder by Email
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. |
E 400 tune — FAQ
How much horsepower does a Stage 1 tune add to the E 400?
Stage 1 takes the E 400 from 328 hp / 480 Nm stock to 450 hp / 600 Nm — a gain of about +122 hp / +120 Nm. Stage 2 reaches 480 hp / 650 Nm.
Does the D-Sync tune fit my E 400?
This page covers the W212 / W213 / C207 / A207 / C238 / A238 E 400, 2013–2018. The exact file list is matched to your ECU software version after free VIN verification in the app. Email your VIN to duke@yd-autogroup.com before ordering and we confirm availability for your exact ECU version.
What is the difference between Stage 1 and Stage 2 on the E 400?
Stage 1 runs entirely on factory hardware — no supporting mods required — and also supports cars with an upgraded intake and improved cooling; it delivers 450 hp / 600 Nm. Stage 2 requires a high-flow exhaust system, with an upgraded intake and improved cooling recommended alongside it; it delivers 480 hp / 650 Nm. Both are off-the-shelf software calibrations flashed over OBD, and you can revert to stock with one tap anytime.
Do I need 93 octane for the E 400 tune?
No. Stage 1 and Stage 2 are each calibrated separately for AKI 91 and AKI 93 fuel, plus a Stage 0 factory-power baseline — five OTS files per car. Pick the file that matches the fuel you actually run.
Can I flash the E 400 without a laptop or sending the ECU away?
Yes. 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. No laptop, no bench, no shipping your ECU. Third-party dongles (ELM327 and similar) are not supported.
How much does the E 400 tune cost?
$799 USD — includes the Flash & Log and OTS Mappack licenses and the D-Sync D1 Wi-Fi dongle, covering one VIN, with free standard shipping to supported regions. Online checkout for the US & Canada; other supported regions order by email with the VIN.
My E 400 already has a tune from another company — can I still use D-Sync?
Yes. The D-Sync OTS file is flashed directly over whatever is on the ECU now — another company's Stage 1 or an unknown tune the car came with. We also supply the Mercedes factory calibration matched to your ECU software version, so you can return to stock even if the car was already tuned when you bought it.
Do I need a transmission (TCU) tune to run Stage 1 or Stage 2 on the E 400?
No. Both stages are calibrated to run with the factory TCU; a tuned TCU is a bonus, not a requirement. Flashing the 9-speed VGS-NAG3 TCU is a separate product.
Do I need to unlock or flash the CPC on the E 400?
No. D-Sync flashes the engine ECU only. The OTS files are designed to run with or without an unlocked CPC — a factory CPC works as-is, and cars that already have a third-party unlocked CPC are compatible too.
How were these tunes developed and validated?
Each engine family is calibrated on our own development cars, validated on the road and on a Dynojet chassis dyno, and matched to your VIN by ECU software version. After flashing you can record a high-speed log in the app and send it to us for review.
What happens right after the flash?
On the first start after a flash the dash may show ESP or drive-system warnings; they clear after an ignition cycle. Unplug the D1 from the OBD port when you are done — leaving it plugged in can drain the battery on some models.
Will this void my warranty?
Yes — writing calibration data via OBD leaves a timestamp record in the ECU. Mercedes dealerships can see past write events. Many owners simply revert to stock calibration before service visits.
Can I revert to stock?
Yes. Your original factory calibration is always saved. You can flash back to stock with one tap in the D-Sync app, anytime you want.
What is the return policy?
D-Sync allows returns within 14 days of purchase, provided the License has not yet been activated. The full return policy is in the homepage FAQ.
Other M276 cars
AMG C 43 · AMG E 43 · AMG GLC 43 · AMG GLE 43 · AMG SLC 43 · C 400 / C 450 · E 450 · CLS 400 · SL 400 / SL 450 · S 450 / 400 / 320 · GLE 400 / GLE 450 / ML 400 · GL / GLS 400 / 450
M276 overview · All supported cars · Interactive catalog · D1 Dongle