Mercedes-AMG C43 (W205) Remapping and Tuning – GPF & Non-GPF Variants
Unlock the full potential of your Mercedes-AMG C43 (W205 – 3.0L V6 Biturbo, 2016–2021) with Onyx Performance, based in Slough, Berkshire, just outside West London. Whether your C43 is equipped with a GPF (Gasoline Particulate Filter) or not, our custom ECU remapping, servicing, performance upgrades, and security solutions will enhance power, torque, and overall drivability, all while maintaining reliability.
We offer custom-tailored tuning solutions to ensure maximum performance from the AMG-tuned M276 V6 engine for both GPF and non-GPF models.
Mercedes-AMG C43 Stage 1 & Stage 2 – Power Gains
Stage 1 – Power Gains:
- Stock Power (Non-GPF Model): 367HP / 520Nm
- Stock Power (GPF Model – 2018+): 390HP / 520Nm
- Stage 1 Remap (Both Models): 440HP / 630Nm
- Hardware Required: None
Our Stage 1 remap unlocks substantial power and torque gains with no hardware modifications required. The optimised ECU calibration enhances throttle response, turbo efficiency, and acceleration, transforming the C43 AMG into an even more dynamic driving machine.
💡 Spark Plug and Ignition Coil Upgrade: Highly recommended for Stage 1 tuning to enhance ignition performance, improve reliability, and ensure smooth operation under increased power loads.
Stage 2 – Power Gains:
- Stage 2 Remap (Both Models): 480HP / 700Nm*
- Hardware Required:
- Decat Downpipe or High-Flow Sports Catalyst
- Cat-Back Exhaust System (optional but highly recommended)
- Upgraded Air Filter
- GPF Delete (recommended for maximum sound and performance – applicable to GPF models)
- Spark Plug Upgrade (essential for improved ignition and reliability at Stage 2)
Stage 2 tuning takes performance even further by incorporating essential hardware upgrades to enhance airflow, cooling, and exhaust efficiency, leading to stronger power delivery and sharper throttle response.
Looking for More Power?
For enthusiasts aiming for even greater performance, we offer Stage 3 tuning packages featuring hybrid turbo upgrades, high-pressure fuel pumps, and supporting modifications for exceptional power and torque.
📞 Call us on 01753 439321 to discuss Stage 3 options!
Why Choose Onyx Performance?
At Onyx Performance, we specialise in Mercedes-AMG C43 tuning and provide a range of services to ensure your C43 operates at peak performance while maintaining reliability:
✔ Rolling Road (Dyno) Testing for precise power measurement
✔ Data Logging and Diagnostics to ensure optimal engine performance
✔ Before and After Performance Printouts
✔ Engine Smoke Tests to check for Boost/Vacuum Leaks
✔ Optional Features:
- Overrun Crackles
- Speed Limiter Removal
- Catalyst Fault Code Deletes
Our expert team ensures your Mercedes-AMG C43 (W205) delivers enhanced power, torque, and response, while keeping engine safety and reliability a priority.
Exhaust Upgrades for Mercedes-AMG C43 (W205)
Enhance the sound and performance of your C43 AMG with a high-performance exhaust system:
🔧 Decat Downpipes – Improves turbo efficiency and exhaust flow for maximum power
🔧 High-Flow Sports Catalysts – Reduces backpressure while remaining emissions compliant
🔧 Cat-Back Exhaust Systems – Enhances exhaust tone and sound quality
🔧 GPF Delete – Recommended for maximum sound and performance (applicable to later GPF models)
🔧 Resonator Deletes – Adds a sportier, aggressive exhaust note
Pairing Stage 2 tuning with a decat downpipe or GPF delete allows for maximum power gains and an enhanced exhaust note.
Servicing and Maintenance for Mercedes-AMG C43 (W205)
Keeping your Mercedes-AMG C43 (W205) in peak condition is essential for long-term reliability. At Onyx Performance, we offer:
🔧 Routine Servicing: Oil changes, filter replacements, and essential inspections
🔧 Brake Repairs and Upgrades: OEM replacements and performance brake kits
🔧 Suspension Maintenance: Checks and optimisations for handling and ride comfort
🔧 Diagnostics and Fault Repairs: Advanced system scans to prevent potential issues
With our expertise in Mercedes-AMG models, you can trust Onyx Performance to maintain and enhance your vehicle with precision and care.
Styling, Performance Upgrades & Vehicle Security
Elevate your Mercedes-AMG C43 (W205) with custom styling, performance upgrades, and vehicle security solutions tailored to your needs:
Styling and Performance Upgrades:
🎨 Aero Kits & Carbon Fibre Components – Aggressive styling and improved aerodynamics
🎨 Lowering Springs & Coilovers – Enhanced handling and stance
🎨 Big Brake Kits – Superior stopping power for track and road use
Vehicle Security Solutions:
🔒 Autowatch Ghost Immobilisers – Prevents key cloning and unauthorised starts
🔒 MetaTrak Trackers – Live GPS tracking with mobile app integration
🔒 Scorpion Track Systems – Motion alerts and driver recognition for ultimate protection
🔒 Fleet Trackers – Ideal for multiple high-value vehicles with monitoring features
Our security systems are professionally installed to provide seamless integration and maximum protection.
What Our Customers Say
⭐ “Stage 1 completely transformed my C43! It’s quicker, smoother, and more responsive. Fantastic service from Onyx Performance!”
– Nathan B., Harrow
⭐ “Stage 2 tuning with the decat downpipe made my C43 sound insane. The power delivery and exhaust tone are incredible!”
– Mo K., Staines
Opening Hours and Contact Information
📍 Visit Us:
Location: Slough, Berkshire
🕒 Opening Hours:
- Monday–Friday: 10 AM–6 PM
- Saturday: 10 AM–3 PM
- Closed Sundays
📞 Phone: 01753 439321
✉️ Email: info@onyxperformance.co.uk
Flexible Finance Options
💳 Spread the cost of your Mercedes-AMG C43 tuning, performance upgrades, and security solutions with our flexible finance plans, available over 4 monthly payments.
✅ All prices include VAT
✅ No hidden fees
✅ Simple application process
Contact Onyx Performance
Transform your Mercedes-AMG C43 (W205, M276 Engine) 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.
📞 Call us now on 01753 439321 to book your tuning service or discuss Stage 2 and security options!
Tags:
- Mercedes-AMG C43 (W205) tuning in Slough
- AMG C43 Stage 1 remap (440HP / 630Nm)
- AMG C43 Stage 2 tuning with performance exhaust (480HP / 700Nm)
- Downpipe upgrades for Mercedes-AMG C43 (W205)
- GPF delete for Mercedes-AMG C43 (GPF Models)
- Servicing and maintenance for AMG C43 (W205)
- Vehicle security for AMG C43 with immobilisers and trackers
- Custom aero and carbon fibre upgrades for AMG C43
🚗 Unlock the true potential of your AMG today! 🚗
