Here is the refined and corrected profile for the M156 CLS63.
Technical Correction: The C218 chassis actually started in 2011 with the Biturbo engine. The 6.2L Performance Calibration: Mercedes-Benz AMG CLS63 (W219)
Engine: M156 6.2L Naturally Aspirated V8 | Years: 2007–2011
 
The M156 was the first engine designed entirely from the ground up by AMG. As one of the greatest naturally aspirated V8s ever built, it is famous for its high-revving nature and iconic exhaust note. While powerful from the factory, the M156 is heavily restricted by factory throttle mapping and ignition timing—especially in the early CLS models. Our calibration unlocks the full displacement of this 6.2L monster.
 
🏁 Stock Baseline Reference
Standard Output: 507 HP / 465 LB-FT
Note: While the C63 of this era was detuned to 451 HP, the CLS63 baseline is higher, but still sees significant "top-end" gains through software.
 
🚀 Performance Calibration Options
Feature
Stage 1 Calibration
Power Output
530 HP
Peak Torque
486 LB-FT (660 Nm)
Requirements
Stock Hardware Compatible
Installation
Fully OBD Process
V-Max Limiter
Removed
 
🛠️ Why Calibrate the M156?
Throttle Map Optimization: The factory software often limits throttle plate opening to 60-70% in certain RPM ranges. We unlock 100% wide-open throttle for instant, linear power.
Ignition Timing: We optimize timing maps to take advantage of 93+ octane fuel, improving throttle response and mid-range "shove."
Transmission Integration: Improved communication between the ECU and TCU for faster, crisper shifts and rev-matching.
Fuel Efficiency: By optimizing the volumetric efficiency of the engine, cruising MPG is often improved.
 
📖 The M156 Legacy
The M156 features a high-revving design, lightweight aluminum construction, and an innovative variable valve timing system. It served as the heart of the C63, E63, and the SLS AMG (M159). Our calibration ensures your CLS63 delivers the exhilarating performance this engine was truly designed for, while maintaining the factory fail-safes and engine-protection logic.
 
🔧 Recommended Maintenance for M156 Owners
To ensure your engine handles the new calibration perfectly, we recommend:
Air Filters: Inspect or replace factory filters (or upgrade to high-flow Row Airboxes/Filters).
Fuel Grade: 93 Octane (98 RON) is required for maximum power gains.
Oil Service: Ensure you are using a high-quality 5W-40 or 0W-40 synthetic oil with MB 229.5 approval.
 
This Calibration File Fits:
2007 to 2011 Mercedes-Benz CLS63 AMG (6.2L V8)
Chassis Code: W219
 
Here is the updated section featuring the custom software options that M156 owners frequently request. Adding these "enthusiast features" is a great way to increase the value of your tuning service.
 
⚡ Custom Software Features
 
The M156 engine is famous for its sound. We offer several optional software adjustments to enhance the character of your CLS63:
Cold Start Delete: The M156 is notoriously loud during the high-idle "Cold Start" cycle. If you have an upgraded exhaust or live in a quiet neighborhood, we can modify the software to reduce the high-idle RPM and air-pump noise upon startup for a more refined experience.
Exhaust Crackle (Overrun): We can adjust the deceleration fuel cut-off to create a subtle or aggressive "crackle" and "pop" when you lift off the throttle or downshift. This is designed to work safely within the limits of your exhaust system.
V-Max Limiter Removal: The factory top-speed governor is removed, allowing the vehicle to reach its true aerodynamic top speed (track use only).
Improved Rev-Matching: We sharpen the throttle blips during downshifts (S and S+ modes), making the transmission feel more modern and responsive.
 
🔧 Recommended Maintenance for M156 Owners
To ensure your engine handles the new calibration perfectly, we recommend:
Air Filters: Inspect or replace factory filters. For maximum gains, we recommend high-flow "ROW" airboxes or performance drop-in filters.
Fuel Grade: 93 Octane (98 RON) is required for the 530 HP peak power gains.
Oil Service: Use a high-quality 5W-40 or 0W-40 synthetic oil with MB 229.5 approval.
Camshaft/Lifter Health: As with all M156 engines, ensure your valve train is in good health before applying performance software.
 
This Calibration File Fits:
2007–2011 Mercedes-Benz CLS63 AMG (6.2L V8)
Chassis Code: W219