Mercedes
AMG A 45 S
2021 ECU TUNE
Precision-tuned for the 2021 Mercedes AMG A 45 S. Experience up to +74HP and +105TQ 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
With Stage 1 software, gains reach up to 60 HP / 61 PS plus 80 lb-ft / 108 Nm; the resulting figures are approximately 475 HP / 482 PS and 449 lb-ft / 608 Nm.
The Stage 2 calibration delivers up to 74 HP / 75 PS and 105 lb-ft / 142 Nm above stock, moving output to about 489 HP / 496 PS and 474 lb-ft / 642 Nm.
ECU Unlock
An ECU unlock is the process of removing the manufacturer's read/write protection on a vehicle's engine control unit, giving tuners access to the internal calibration data using flash tools. This restores the ability to read the original calibration, modify maps and parameters, and write custom software back to the unit, forming the foundation that other services, like map switching or custom calibration, are built on top of.
AMG 8SPD DCT TCU Calibration
Our AMG TCU Calibration Upgrade recalibrates transmission torque intervention, shift behavior, and control parameters so the gearbox can keep up with an upgraded ECU's increased power and torque, delivering faster, more decisive gear changes, stronger gear holding under acceleration, and quicker downshifts while retaining smooth, refined drivability during normal driving. Pairing the TCU with the ECU calibration is important because factory transmission strategies will otherwise intervene and limit delivery of the added torque, with both systems properly balanced, the engine and transmission work together for stronger acceleration and more consistent performance. Learn more about AMG TCU calibration
CPC Calibration
Our AMG CPC Calibration Upgrade recalibrates the Central Powertrain Controller's torque monitoring so it properly supports increased engine output instead of capping it at factory levels, removing unnecessary torque intervention for smoother, more consistent power delivery. Since the ECU, CPC, and TCU all work from a shared torque model, tuning the ECU alone isn't enough, if the CPC and TCU are still operating on factory torque targets, they'll continue limiting output regardless of what the ECU allows. Learn more about AMG CPC calibration
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 A 45 S.
A Stage 1 ECU calibration on the 2021 Mercedes Amg A 45 S can deliver up to +60 Horsepower and +80 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 A 45 S 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 A 45 S 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.