Mercedes-AMG GLC63 X253/C253 Remap & Tuning
Upgrade your Mercedes-AMG GLC63 476HP with professional Stage 1 and Stage 2 ECU tuning from Onyx Performance in Slough, Berkshire. Our bespoke ECU remapping is designed to unlock the potential of the 4.0 V8 BiTurbo petrol engine, delivering impressive power and torque gains, sharper throttle response and improved overall drivability.
The Mercedes-AMG GLC63 X253/C253 combines SUV practicality with powerful AMG V8 performance. With professional ECU calibration, the standard 476HP and 650Nm output can be increased to an impressive 570HP and 780Nm with Stage 1 tuning, or up to 610HP and 830Nm with Stage 2 tuning.
Mercedes-AMG GLC63 Performance Figures
| Performance | Power (HP) | Torque (Nm) |
|---|---|---|
| Standard Performance | 476 | 650 |
| Stage 1 Remap | 570 | 780 |
| Stage 2 Remap | 610 | 830 |
Stage 1 Remap Price: £699.00
Original Price: £838.80
Stage 2 Remap: Call for a Stage 2 quote
Performance figures are indicative and may vary depending on vehicle condition, fuel quality, modifications and individual vehicle specifications.
Gearbox Tuning
A gearbox remap can complement your engine tune by optimising gear changes, shift response and transmission behaviour. Contact our team to discuss the most suitable gearbox calibration for your Mercedes-AMG GLC63.
- Stage 1 Gearbox Remap: Contact for Price
- Stage 2 Gearbox Remap: Contact for Price
- Stage 3 Gearbox Remap: Contact for Price
BEFORE TUNING
Before carrying out any ECU remapping, we recommend ensuring your vehicle is mechanically sound and properly maintained. Our team can discuss your GLC63’s condition, modifications and tuning goals before proceeding.
SERVICING AND MAINTENANCE
Regular servicing is essential for maintaining the performance and reliability of your Mercedes-AMG. We recommend keeping up with engine oil, filters, spark plugs and other manufacturer-recommended maintenance to support your tuned vehicle.
EXHAUST UPGRADES
Enhance the sound and character of your GLC63 with a performance exhaust upgrade. We can help you explore suitable exhaust options to complement your vehicle’s performance and styling.
PERFORMANCE UPGRADES
Alongside ECU remapping, we can discuss additional performance enhancements to help you achieve your desired power delivery and driving experience. All upgrades should be selected to suit your vehicle and intended use.
STYLING AND BODY UPGRADES
Give your Mercedes-AMG GLC63 a distinctive appearance with styling and body enhancements. Contact Onyx Performance to discuss available options for your vehicle.
VEHICLE SECURITY
Protect your investment with suitable vehicle security solutions. Our team can advise on available security enhancements for your Mercedes-AMG.
WHY CHOOSE ONYX PERFORMANCE?
At Onyx Performance, we focus on tailored vehicle tuning and performance upgrades. We take your vehicle’s specification and requirements into consideration to help deliver a tuning solution suited to your needs.
REMAPPING IN SLOUGH
Onyx Performance provides professional ECU remapping and vehicle upgrades in Slough, Berkshire. If you own a Mercedes-AMG GLC63 X253/C253, contact our team to discuss Stage 1 or Stage 2 tuning options.
Frequently Asked Questions
How much power can a Stage 1 remap add to my Mercedes-AMG GLC63?
The quoted Stage 1 remap increases power from 476HP to approximately 570HP and torque from 650Nm to 780Nm. Actual results may vary.
How much power can a Stage 2 remap produce?
The quoted Stage 2 figures are approximately 610HP and 830Nm. Stage 2 suitability and pricing should be discussed with our team.
Do I need hardware upgrades for Stage 1 or Stage 2?
Stage 1 generally uses the existing vehicle hardware, subject to its condition and suitability. Stage 2 may require supporting hardware modifications depending on the chosen calibration.
Can I have a gearbox remap with my engine remap?
Yes. Gearbox tuning can complement an engine remap. Contact us to discuss the available gearbox tuning options for your vehicle.
Can I have a dyno session?
Yes. We offer dyno sessions for £120.00 to help assess your vehicle’s performance.
Do you offer Stage 3 tuning?
Contact Onyx Performance to discuss your performance goals and whether a more extensive custom tuning package is suitable for your vehicle.
Does my Mercedes-AMG need an ECU unlock?
This vehicle is listed with a Bosch MED17.7.5 ECU. ECU access and any unlock requirements depend on the ECU hardware and software version. We recommend checking your vehicle’s ECU before confirming the available tuning method.
BOOK YOUR REMAP
Ready to unlock more performance from your Mercedes-AMG GLC63? Contact Onyx Performance to discuss your requirements, confirm compatibility and arrange your remap.
Contact Onyx Performance
Transform your Mercedes-AMG GLC63 today with Onyx Performance. Whether you’re looking for Stage 1 or Stage 2 remapping, performance exhaust systems, styling enhancements, or vehicle security solutions, our expert team is here to help.



