Mercedes E63 AMG 5.5 V8 BiTurbo (CLS63, ML63, GL63) Remapping and Tuning
Unlock the Full Potential of Your AMG with Onyx Performance
Enhance the power, torque, and responsiveness of your Mercedes E63 AMG 5.5L V8 BiTurbo, also applicable to CLS63, ML63, and GL63 AMG models, with Onyx Performance, based in Slough, Berkshire. Our custom ECU remapping and performance upgrades improve drivability while ensuring long-term engine reliability.
We specialise in maximising the performance of the M157 5.5L BiTurbo V8 engine, offering sharper throttle response, stronger torque, and an exhilarating driving experience.
Mercedes E63 AMG 5.5 V8 BiTurbo (M157) Stage 1 & Stage 2 – Power Gains
Stage 1 – Power Gains
- Stock Power: 550HP / 720Nm
- Stage 1 Remap: 630HP / 900Nm
- Hardware Required: None
Our Stage 1 remap delivers significant power gains without requiring hardware modifications. Optimised ECU calibration enhances throttle response, boost control, and fuel delivery, making the E63 AMG (CLS63, ML63, GL63) even more engaging and responsive.
💡 Spark Plug Upgrade: Recommended for Stage 1 to improve ignition reliability under increased power loads.
Stage 2 – Power Gains
- Stage 2 Remap: 680HP / 1000Nm
- Hardware Required:
🔧 Decat Downpipe or High-Flow Sports Catalyst
🔧 Cat-Back Exhaust System (Optional but highly recommended)
🔧 Upgraded Air Intake System
🔧 Performance Fuel Injectors (For improved fueling at Stage 2)
🔧 Spark Plug Upgrade (Essential for optimal ignition at Stage 2)
Stage 2 tuning integrates essential hardware upgrades to boost airflow, turbo efficiency, and fueling capacity, delivering stronger power delivery and sharper throttle response.
Looking for Even More Power?
For extreme performance, we offer Stage 3 tuning packages featuring:
- Hybrid turbo upgrades for massive power gains.
- High-pressure fuel pumps for increased fueling capacity.
- Methanol injection kits for additional cooling and power.
📞 Call us now on 01753 439321 to discuss your Stage 3 tuning options!
Why Choose Onyx Performance?
✔ Rolling Road (Dyno) Testing – Verified power gains.
✔ Data Logging & Diagnostics – Ensures optimal engine performance.
✔ Before & After Performance Printouts – Measurable improvements.
✔ Engine Smoke Tests – Detects boost or vacuum leaks.
✔ Optional Features: Overrun Crackles, Speed Limiter Removal & Catalyst Fault Code Deletes.
Our expert team ensures your Mercedes-AMG delivers enhanced power, torque, and responsiveness while maintaining engine safety.
Exhaust Upgrades for Mercedes E63 AMG 5.5 V8 BiTurbo (M157)
Upgrade the sound and performance of your E63 AMG, CLS63, ML63, or GL63 with premium exhaust options:
🔧 Decat Downpipes – Maximises exhaust flow and power delivery.
🔧 High-Flow Sports Catalysts – Reduces backpressure while remaining emissions compliant.
🔧 Cat-Back Exhaust Systems – Enhances exhaust tone and efficiency.
🔧 Resonator Deletes – Adds a deeper, more aggressive exhaust note.
🔧 GPF Delete (Applicable for later models) – Unlocks maximum exhaust sound and performance.
📞 Call 01753 439321 to pair your Stage 2 tuning with a performance exhaust system for ultimate gains.
Servicing and Maintenance for Mercedes-AMG Models
Keep your Mercedes-AMG 5.5 V8 BiTurbo in top condition with our expert services:
🔧 Routine Servicing – Oil changes, filter replacements & essential inspections.
🔧 Brake Repairs & Upgrades – OEM replacements and performance brake kits.
🔧 Suspension Maintenance – Enhancing handling and ride comfort.
🔧 Diagnostics & Fault Repairs – Advanced system scans to prevent potential issues.
📞 Book your AMG service today: 01753 439321
Styling, Performance Upgrades & Vehicle Security
Styling and Performance Upgrades
🎨 Aero Kits & Carbon Fibre Components – Aggressive styling & improved aerodynamics.
🎨 Lowering Springs & Coilovers – Better stance & handling.
🎨 Big Brake Kits – Superior stopping power for high-performance driving.
Vehicle Security Solutions
🔒 Autowatch Ghost Immobilisers – Prevents key cloning & theft.
🔒 MetaTrak Trackers – Real-time GPS tracking.
🔒 Scorpion Track Systems – Motion alerts and driver recognition.
🔒 Fleet Trackers – Monitor multiple high-value vehicles.
📞 Secure your AMG – Call 01753 439321 for security solutions!
What Our Customers Say
⭐ “Stage 1 tuning completely transformed my E63 AMG! The throttle response and power gains are incredible. Thanks to Onyx Performance!” – Tom W., London
⭐ “Stage 2 tuning with performance exhaust and a decat downpipe made my CLS63 sound and drive like an absolute monster. Amazing service!” – Alex R., Birmingham
📞 Join our satisfied customers – Call 01753 439321 today!
Flexible Finance Options
💳 Spread the cost of your AMG tuning, performance upgrades, and security solutions over 4 monthly payments.
✅ All prices include VAT
✅ No hidden fees
✅ Simple application process
📞 Call now: 01753 439321 to book your AMG tuning today!
🚗 Unlock the true potential of your AMG with Onyx Performance! 🚗
