Pair the OBD tuning dongle to the vehicle and prepare it for reading and flashing.
PREMIUM ECU CALIBRATIONS BY SHEEPEYRACE
TEXT OUR TEAM
Mercedes GLC 450 AMG X253 Facelift 3.0T (2020–2022)
ECU CALIBRATION
FACTORY
367
HP
384
LB-FT
Vehicle-specific ECU calibration developed to improve power delivery, throttle response and overall drivability.
01VEHICLE-SPECIFIC
02DYNO + ROAD VALIDATED
03CONTINUED REFINEMENT
04DIRECT TUNER SUPPORT
01 / CONFIGURE
Build your calibration.
Select your performance stage and the tuning method that works best for you.
02 / OBD PROCESS
OBD tuning
simplified.
From initial pairing to writing your finished calibration, the OBD workflow is designed to keep the process straightforward while giving you direct access to our tuning team.
Read the ECU file and request your custom calibration or optional adjustments.
Write the completed calibration back to the vehicle directly through the OBD port.
03 / PERFORMANCE
Numbers that matter.
Horsepower
Torque
* Horsepower and torque figures are estimates and may vary based on fuel octane, vehicle condition, modifications, environmental conditions, and other factors.
04 / THE CALIBRATION
Performance without changing the character.
Every calibration we release is built from experience, testing, and refinement across countless vehicles and configurations. Through repeated data logging, real-world testing, dyno validation, and continued calibration development, we refine each file until power delivery, drivability, response, and consistency all meet our standard. The result is not simply more power — it is a calibration developed through experience and proven through testing.
01
POWER DELIVERY
Optimized calibration strategies for stronger, more usable performance throughout the rev range.
02
THROTTLE RESPONSE
Sharper pedal response and more immediate engine behavior without making the car difficult to drive.
03
VEHICLE SPECIFIC
Calibration matched to your vehicle, fuel and installed hardware rather than a one-size-fits-all approach.
05 / STAGE 1
Stock hardware.
Sharper car.
420 HP
457 LB-FT
Every vehicle leaves the factory with performance still on the table. OEM calibrations are designed around emissions, fuel quality, climate, and global market requirements—not maximum performance. Stage 1 unlocks that reserved potential while retaining the factory hardware and everyday drivability.
06 / STAGE 2
The full
calibration.
450 HP
502 LB-FT
Stage 2 is engineered to extract the maximum performance available from your vehicle and supporting hardware. Power delivery, boost where applicable, throttle response, and torque strategies are optimized for a more aggressive driving experience. Additional calibration options can include adjustable deceleration burbles, more aggressive exhaust behavior, and optional flame strategies where supported by the vehicle and hardware.
07 / HOW IT WORKS
Choose how you tune.
01
BENCH TUNING
Remove and ship the ECU to us. We program it with your calibration and ship it back ready to reinstall.
02
LOCAL INSTALL
Bring the vehicle to our Murrieta facility and our team handles the tuning process in person.
03
OBD TUNING DONGLE
Connect through the vehicle's OBD port to read, request and flash your calibration without removing the ECU.
DIRECT SUPPORT
Before.
During.
After.
Every calibration includes direct access to our tuning team from start to finish. We consider the process complete only when the calibration meets the standard we expect for power delivery, drivability, response, and overall refinement. In the unlikely event that further adjustment is needed, we will continue working with you until the calibration is fully dialed in for your vehicle. Your calibration also evolves with your build. If you begin with Stage 1 and later upgrade to Stage 2 hardware, there is no additional calibration fee to move your vehicle to the corresponding Stage 2 file.
TEXT OUR TUNING TEAM →08 / DETAILS
Good to know.
What is included with the tune?+
Your vehicle-specific ECU calibration and direct support from our tuning team throughout the process.
Can the vehicle be returned to stock?+
In most applications, yes. Available flashing methods and return-to-stock procedures vary by ECU and vehicle.
What modifications are required?+
Requirements depend on the selected stage. Stage-specific hardware requirements are shown above and should be confirmed before flashing.
Warranty information+
ECU tuning and related modifications may affect or void your vehicle manufacturer's warranty. Coverage decisions are made by the manufacturer, dealership or warranty provider.
Emissions / competition use+
This product is intended only for uses permitted by applicable law. Customers are responsible for compliance with all federal, state and local emissions and vehicle-use regulations.