Mercedes-AMG GLC53 X254/C254 Remap & Tuning
Upgrade your Mercedes-AMG GLC53 449HP with professional Stage 1 and Stage 2 ECU tuning from Onyx Performance in Slough, Berkshire. Our performance remapping is designed to unlock additional power and torque from the 3.0 I6 M256 EVO MHEV petrol engine, improving throttle response, acceleration and overall drivability.
The Mercedes-AMG GLC53 combines performance-focused AMG engineering with the practicality of the GLC platform. Its 3.0-litre inline-six mild-hybrid powertrain provides a strong foundation for ECU tuning. With carefully calibrated software, our tuning options are designed to enhance power delivery and driving characteristics.
Mercedes-AMG GLC53 Performance Figures
| Performance | Power (HP) | Torque (Nm) |
|---|---|---|
| Standard Performance | 449 | 600 |
| Stage 1 Remap | 500 | 650 |
| Stage 2 Remap | 530 | 700 |
Stage 1 Remap Price: £999.00
Original Price: £1,198.80
Stage 2 Remap: Call for a Stage 2 quote
Performance figures are indicative and may vary depending on vehicle condition, modifications, fuel quality and individual vehicle specifications. As this is a mild-hybrid powertrain, tuning compatibility and achievable results should be confirmed following a vehicle assessment.
Gearbox Tuning
A gearbox remap can complement your Mercedes-AMG GLC53 engine tune by optimising transmission behaviour, shift response and gear changes.
- 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 Mercedes-AMG GLC53 is mechanically sound and properly maintained. Our team can discuss your vehicle’s condition, current modifications and performance goals before recommending a suitable tuning option. Mild-hybrid system compatibility should also be assessed before tuning.
SERVICING AND MAINTENANCE
Regular servicing is essential for maintaining the performance and reliability of your Mercedes-AMG GLC53. We recommend keeping up with scheduled maintenance and ensuring the engine, turbocharging system, cooling system, mild-hybrid components and transmission are in good condition before tuning.
EXHAUST UPGRADES
Enhance your Mercedes-AMG GLC53 with performance exhaust upgrades. An upgraded exhaust system can change the vehicle’s sound and appearance while complementing its inline-six engine performance.
PERFORMANCE UPGRADES
Alongside ECU remapping, we can discuss additional performance enhancements to suit your Mercedes-AMG GLC53. The right combination of upgrades can help support your vehicle’s performance objectives.
STYLING AND BODY UPGRADES
Give your Mercedes-AMG GLC53 a more individual appearance with styling and body enhancements. We can help you explore upgrades that complement the X254/C254 design.
VEHICLE SECURITY
Protect your Mercedes-AMG with vehicle security solutions from Onyx Performance. Speak to our team about suitable security enhancements for your vehicle.
WHY CHOOSE ONYX PERFORMANCE?
At Onyx Performance, we provide professional vehicle tuning and performance services with a focus on quality, careful calibration and customer support.
- Professional ECU remapping
- Stage 1 and Stage 2 tuning options
- Performance exhaust and upgrade solutions
- Styling and body enhancements
- Vehicle security solutions
- Experienced advice tailored to your vehicle
REMAPPING IN SLOUGH
Onyx Performance provides professional ECU remapping in Slough, Berkshire. Whether you are looking for a Stage 1 remap or want to discuss a more comprehensive Stage 2 setup for your Mercedes-AMG GLC53, contact our team to discuss your requirements.
Frequently Asked Questions
How much power can a Stage 1 remap add to my Mercedes-AMG GLC53?
The listed Stage 1 figures increase power from 449HP to approximately 500HP, with torque increasing from 600Nm to 650Nm. Actual results can vary depending on vehicle condition, specification and mild-hybrid system compatibility.
How much power can a Stage 2 remap produce?
The listed Stage 2 figures are approximately 530HP and 700Nm. Stage 2 suitability and any supporting hardware requirements should be discussed with our team.
Do I need hardware upgrades for Stage 1 or Stage 2?
Stage 1 tuning is generally intended for vehicles without major hardware changes. Stage 2 may require supporting modifications depending on the setup. We recommend discussing your vehicle with our team before proceeding.
Can I have a gearbox remap with my engine remap?
Yes. Gearbox tuning can be discussed alongside your engine remap. Contact us for available gearbox tuning options and pricing.
Can I have a dyno session?
Yes. Dyno sessions are available at £120.00. A dyno session can 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 tuning package is suitable for your Mercedes-AMG GLC53.
Does my Mercedes-AMG need an ECU unlock?
The listed ECU for the Mercedes-AMG GLC53 is Bosch MG1CP002. ECU access and tuning requirements can depend on the ECU hardware and software version. As this is a newer mild-hybrid model, our team should verify ECU compatibility and access requirements for your specific vehicle before confirming the available tuning options.
BOOK YOUR REMAP
Ready to unlock more performance from your Mercedes-AMG GLC53? Contact Onyx Performance to discuss Stage 1 or Stage 2 ECU remapping, gearbox tuning and further performance upgrades.
Contact Onyx Performance
Transform your Mercedes-AMG GLC53 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.



