Mercedes Benz AMG M256 Hybrid ECU Tune E53 GLE53

Purchase M256 Hybrid ECU Tune

SKU: M256-Hybrid-ECU-Tune
M256 Hybrid ECU Tune
Power gain Up To
+100 HP

Torque gain Up To
+100 TQ

Advertised gains are estimates of HP and Torque “at the engine” calculated from gains as measured on a Dynojet Dynamometer in ideal conditions and typically show the largest possible change. Actual gains are dependent on the following: Learn More about Crank HP Vs Wheel HP

Model – Manufacturers use the same engine in multiple model vehicles and often times they are in a different state of tune, for example: 2008 C63 and a 2008 CLK Black Series. Both have the same engine, but the C63 has 451hp while the CLK63 has 500hp. Naturally the C63 will show more gains as it starts at a lower level.

Model Year – Similar to above, as time progresses, Manufacturers tend to slightly increase power output via software from one year to the next or offer “Performance Packages” with increased power. The engines remain largely unaltered and as a result, final tuned output remains the same, while the gains are lower as the starting point is now higher.

Fuel – Fuel quality is HIGHLY important with performance vehicles. Low quality and/or low octane fuel will greatly impact engine output and potentially even engine health. Top tier brand premium fuels should always be used to achieve the best results possible.

Drivetrain – All wheel drive has higher drivetrain losses than rear wheel drive. This results in lower numbers when testing on a chassis dyno. Wheel/tire size and weight will also impact chassis dyno results

Weather/Conditions – Temperature, humidity, altitude, and air density all impact engine performance. Heat, high humidity, and thin air will all work towards reducing engine output

Engine Health – Higher miles tends to result in increased build up and lower compression which can and will impact engine output. Properly maintained engines will have better performance than abused or neglected engines.

Supporting modifications – The highest power levels require supporting modifications. Depending on the engine, this could mean forged internals, built transmission, upgraded fuel system, 110+ octane race fuel, etc.
Stage: W.1 (Stock Vehicle) W.2 (Race Exhaust fitted)
Choose from Recommended Products (Optional):
ECU Unlock Service +$600.00

CPC Module (2019+ models) +$1,699.00

9 Speed TCU Tune (2019+) +$1,699.00
Please confirm:
NOT LEGAL FOR SALE OR USE ON POLLUTION CONTROLLED MOTOR VEHICLES
Learn why

Confirmation
Please confirm that you are not installing this product within the United States.

This policy only applies to installers and/or users who are in the United States, customers who reside in other countries should act in accordance with their local laws and regulations.

Some Weistec Engineering performance upgrades may solely be used on vehicles in sanctioned competition which may never be used upon a public road or highway, unless permitted by specific regulatory exemptions (such as a CARB E.O.). For state specific details please visit the following website. http://www.semasan.com/emissions

It is the responsibility of the installer and/or user of the product to ensure that it is used in compliance with all applicable laws and regulations. If a product was purchased in error, do not install and/or use it. The purchaser must arrange to return the product(s) for a full refund.

All performance modifications and installations are at the customer’s own risk. Weistec Engineering holds no responsibility either implied or otherwise for mechanical, electrical or other failure when using any aftermarket performance products.
$1,899.00 $1,899.00
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How To Tune
Prop 65 warning

Warning
This product can expose you to chemicals including carbon black, silica - crystalline, formaldehyde, and lead which are known to the State of California to cause cancer, and lead, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Product details

Weistec Horsepower	636
Weistec Torque	653
Manufacturer	Weistec
Street legal in all the US States	No
Engine Family	M256
Stock Horsepower	536
Stock Torque	553
See more

Vehicle application

year	make	model	trim	engine
2026	Mercedes-Benz	GLE53 AMG Hybrid	Coupe (C167)	Turbocharged 3L I6 (M256)
2026	Mercedes-Benz	GLE53 AMG Hybrid	4MATIC (V167)	Turbocharged 3L I6 (M256)
2026	Mercedes-Benz	E53 AMG Hybrid	4MATIC (W214)	Turbocharged 3L I6 (M256)
2025	Mercedes-Benz	E53 AMG Hybrid	4MATIC (W214)	Turbocharged 3L I6 (M256)
2024	Mercedes-Benz	E53 AMG Hybrid	4MATIC (W214)	Turbocharged 3L I6 (M256)

Product Description

2022 and newer models require an ECU unlock.

Note: This is a reflash of your original ECU

** Bench flash only.

ECU Tuning Process: How do I get my ECU tuned?

The Weistec M256 ECU upgrade for the inline 6-cylinder 3.0 Liter engine provides substantial gains across the entire powerband. With an increased yet still flat powerband to redline, this ECU Tune creates a much quicker, much more responsive yet predictable blast to drive in any situation.

Which M256 does this fit? This tune is built specifically for the plug-in hybrid E53 Hybrid and GLE53 Hybrid, which pair the M256 inline-six with a much larger electric motor and a real high-voltage battery pack, giving them a charge port and genuine electric-only driving range. That's different from the standard mild-hybrid M256 cars (E53, GLE53, CLS53, CLE53, AMG GT 43/53 4-Door Coupe), which use Mercedes' smaller 48-volt EQ Boost system with no plug and no meaningful electric-only range. If your car is one of those standard mild-hybrid models, you'll want our regular M256 ECU Tune instead.

KEY FEATURES:

Increased Horsepower and Torque
Improved Throttle Response
Optimized Fuel, Spark, and Boost
Removed Speed Limiter

*Power gains vary based on model, modifications, fuel, and running conditions.

M256 Hybrid ECU Tune

Power gain Up To

Torque gain Up To

Product Description

KEY FEATURES:

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