Mercedes 3.0 T Remap & Chiptuning – E400, GLE 450, CLS 450

Professional ECU tuning and remapping for the Mercedes 3.0 T petrol engine. Our dyno-tested Stage 1 and Stage 2 calibrations sharpen throttle response and power delivery, with options such as Pop & Bang, GPF/OPF off and limiter changes for supported ECUs.

Engine codes: M276 3.0 V6 / M256 3.0 I6

Fitted to E400GLE 450CLS 450

+26 hp Best Stage 1 power gain

+63 Nm Best Stage 1 torque gain

1 ECU variant covered

Petrol Fuel type

Performance Gains (Dyno-Tested)

Engine	Stock	Tuned	HP Gain	Torque Gain	ECU	Order
3.0 T	435 hp	461 hp	+26 hp +6%	+63 Nm	MG1CP002Stage 1	Order file →

Figures are dyno-tested averages and may vary with hardware condition and fuel quality.

Cars this engine is fitted to

E400, GLE, CLS, Mercedes AMG GT53, Mercedes AMG GT53 X290, Mercedes CLS53 AMG and 3 more

Mercedes · 9

AMG GT53AMG GT53 X290CLSCLS53 AMGCLS53 AMG C257E53 AMGE400GLEGLE43 AMG

Fitment is read from the ECU part numbers in our own database, not from a generic catalogue. The same engine and control unit are fitted to several cars, which is why one page serves them all.

Measured here, tunable everywhere

The figures in the table above are readings taken on the dyno for this engine, not software estimates rounded up to sell a file, and our Stage 1 is calibrated to stay inside the margins the engine was designed with. Only a part of our work is published this way: every ECU, engine and model we can read can be remapped for power, measured page or not.

Available ECU Services for this Engine

The following solutions are supported on the ECU(s) of this vehicle (Petrol):

AGS Removal DTC Removal EVAP Removal GPF/OPF Lambda Pop&Bang Readiness Calibration Speed Limiter Removal

Technical Notes per ECU

Disconnection and read requirements differ by ECU. The notes below apply to the specific ECU listed; the exact removal scope per service is confirmed on each service page.

MG1CP002

PPF off OPF/GPF/PPF PRESSURE AND EGT SENSORS MUST BE DISCONNECTED

Lambda/O2 off PROBE MUST BE DISCONNECTED

Each note is tagged with the service it refers to and applies to the ECU it is listed under. Mechanical preparation is the installer's responsibility. Emission-related solutions are for off-road or motorsport use where permitted by law.

Supported ECU(s): MG1CP002

Frequently Asked Questions

How much power can a Mercedes 3.0 T gain with Stage 1 tuning?

Stage 1 ECU tuning for the Mercedes 3.0 T can add up to +26 hp and +63 Nm of torque, based on dyno-tested calibrations. Actual figures depend on the exact engine variant and hardware condition.

Can GPF/OPF be removed on the Mercedes 3.0 T?

GPF/OPF off is supported on the ECU(s) of this vehicle, strictly for off-road or motorsport use where permitted by law. The exact mechanical preparation and sensor handling are listed per ECU in the technical notes below.

How do I order and how fast is the tuning file delivered?

Upload your original ECU read through the tuning page and receive the calibration by email. Most files are delivered within 15-20 minutes during working hours (daily, 07:00-23:00 CET).

Is the Mercedes 3.0 T tuning file plug-and-play?

You receive a ready-to-flash calibration based on your original file. Flashing it back to the ECU and any related mechanical preparation are handled by the installer with their own tools.

Order your Mercedes 3.0 T tuning file

Upload your original ECU file and receive a professional calibration in 15-20 minutes.

Tune Your File →

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