Mercedes
AMG GLS 63
2021 ECU TUNE
Precision-tuned for the 2021 Mercedes AMG GLS 63. Experience up to +155HP and +170TQ of dyno-verified power with our custom ECU calibration.
Performance Stages
Stage 1
AvailableECU Calibration — Software Only
Stage 2
AvailableECU Calibration — Software Only
Available Add-ons
Enhance your calibration
Calibration Details
In-House Powertrain Calibration
The Stage 1 figures add up to 90 HP / 91 PS and 100 lb-ft / 136 Nm, placing total output around 693 HP / 703 PS and 727 lb-ft / 986 Nm.
The Stage 2 figures add up to 155 HP / 157 PS and 170 lb-ft / 230 Nm, placing total output around 758 HP / 769 PS and 797 lb-ft / 1080 Nm.
ECU Multi-Map Switching
ECU Multi-Map Switching enables the driver to select between multiple independent calibration sets stored in the ECU, allowing on-the-fly changes to engine behavior without stopping the car or re-flashing. Rather than relying on a dedicated hardware switch, this functionality can be implemented through existing in-cabin controls, such as brake plus accelerator, or brake plus cruise-control set.
CPC Calibration
Our AMG CPC Calibration Upgrade optimizes torque monitoring to support increased engine output and reduce unnecessary torque intervention.
It maintains coordinated communication between powertrain controllers for more consistent performance under high loads.
9G TCU Calibration
Our AMG TCU Calibration Upgrade delivers faster gear changes, more responsive downshifts, and improved gear holding during acceleration.
Optimized to complement our ECU calibration, it improves power delivery while maintaining smooth everyday drivability.
Customer Reviews
What our clients say
"If your looking for the fastest and most Reliable McLaren in the World then M3P is your place! Ask for Nate he was very helpful and Knowledgeable and everything turned out just like I wanted. Highly Recommend!!"
"very professional and they know their stuff! highly recommend! call nate, he will take care of you! thanks again guys."
"M3P took my McLaren to the next level! Safa and Nate were incredibly professional and provided work that is second to none. If you are looking to add more juice to your McLaren or AMG, M3P is the place to be. Thanks guys for the great work."
"I have been dealing with Safa for 2 years since owning my McLaren 650S. He is the reason for my continued McLaren ownership as I confidently know I am in great hands with someone knowledgeable and trustworthy! I'm tuned by Safa and the car has ran flawless for 10k+ miles. In addition his crew Nate and Josh are awesome guys and they all feel like family. Couldn't ask for a better shop or people to deal with. Proud to be Mega Strong 💪"
"I brought my AMG in for a bit of routine maintenance, as well as some slight performance modifications. 10/10 recommend, Mega 3 Performance is exceedingly competent on a variety cars and took fantastic care of my car. Their fabrication work is next level, and their technicians are very knowledgeable. I will be using Mega 3 for all of my performance and maintenance moving forward over the Mercedes dealership."
Frequently Asked Questions
Common questions about tuning the 2021 Mercedes AMG GLS 63.
A Stage 1 ECU calibration on the 2021 Mercedes Amg Gls 63 can deliver up to +90 Horsepower and +100 ft-lbs of Torque over the stock figures. Actual results may vary, but expect noticeably improved acceleration, a smoother powerband, and sharper throttle response.
Our Stage 1 calibration is designed to operate within safe engine parameters without triggering fault codes. We recommend consulting with us about your specific situation and warranty coverage before proceeding.
Our Stage 1 calibration for the 2021 Amg Gls 63 is a software-only upgrade. You do not need any mechanical modifications, making it a clean, reversible performance improvement that works on your stock vehicle.
No, our custom ECU calibration for the 2021 Amg Gls 63 is engineered to enhance throttle response and smooth out the powerband. The result is better drivability in everyday traffic, as well as a more engaging experience during spirited driving.