2006 — 2010
6.2L (M156) - CL 63 AMG naturally aspirated
Petrol
Listen closely during a cold start. As the engine warms up, pay attention for any rhythmic ticking or tapping sounds from the top end, as the M156 engine's camshaft adjusters can occasionally exhibit wear in higher-mileage examples.
Monitor the transmission shift quality. While accelerating gently in 'Comfort' mode, ensure the 7G-Tronic transmission shifts through the gears smoothly without any hesitation or firm 'thumping' between gear changes.
Check the ABC (Active Body Control) suspension by cycling through the suspension height settings while parked. Ensure the car lifts and lowers evenly without any warning lights appearing on the dashboard or prolonged delays.
Test the electrical systems and interior features thoroughly. With a car of this complexity, take a moment to operate every window, seat adjustment, and the COMAND infotainment system to ensure all modules are communicating correctly.
Consider a full transmission fluid and filter flush to maintain crisp shifting characteristics.
Check the condition of the ABC suspension spheres and hydraulic fluid to ensure the ride quality remains as the engineers intended.
This is a good interval to inspect the head bolts and secondary air injection ports for any carbon buildup that can occur over time.
Prioritize high-quality synthetic oil changes every 7,500 to 10,000 kilometers to keep that naturally aspirated 6.2L engine running smoothly.
Keep an eye on the coolant reservoir for any signs of discoloration, which can indicate the health of the cooling system components.
Regularly inspect the condition of your tyres, as the CL 63's power and weight can make the rear rubber wear quite quickly.
Ensure the engine air filters are replaced on schedule; they are crucial for allowing that large-displacement V8 to breathe correctly.
Maintain the ABC hydraulic system by ensuring the fluid is clean and free of contaminants to preserve the longevity of the struts and pump.
Estimated repair costs if issues arise
In cars of this age, the hydraulic struts can eventually show signs of fatigue. If the vehicle begins to sag after being parked for a few days, you might eventually need to budget for a replacement or a specialist refurbishment.
If you notice a rattling sound at start-up, it is common to consider a service for the camshaft adjusters. It involves replacing the internal components to ensure precise valve timing.
Given the performance capabilities of the CL 63, the braking system works hard. If the car features the larger performance brake package, you should plan for higher costs when the time comes to refresh the consumables.
Noticed something inaccurate or missing?Suggest an edit→
Disclaimer: This report is generated with the assistance of AI analysis based on verified automotive data. While we strive for 100% accuracy, enthusiasts should always conduct physical inspections and consult service records. View Full Disclaimer