2012 — 2014
6.2L M156 V8 - Performance Package Plus
Petrol
Check this by inspecting the engine valley: Look for signs of oil pooling near the intake manifold, as the intake manifold gaskets on the M156 can show signs of wear over time.
Listen closely for any clicking or knocking from the front suspension, as the control arm bushings and ball joints are known to experience play in higher-mileage examples.
Ensure the transmission shifts smoothly through all gears in 'Comfort' mode, as the 7G-Tronic gearbox can occasionally show hesitation if the fluid service has been overlooked.
While the engine is at operating temperature, monitor the coolant reservoir for any signs of pressure buildup, as the head bolt concerns, while largely addressed in later facelift models, are still worth keeping an eye on as a proactive measure.
Time to consider a full transmission fluid and filter flush to ensure crisp gear changes.
Recommended interval for refreshing the suspension components and checking the brake discs for wear.
Major service point; consider a thorough inspection of the engine ancillaries and potential preventative cooling system refresh.
Stick to a strict 10,000km oil change interval using high-quality synthetic oil to protect that legendary 6.2L V8.
Keep a close eye on your front tire wear, as the performance-oriented alignment can lead to inner edge scrubbing.
Check your coolant levels regularly, as the M156 engine appreciates running at optimal temperatures.
Ensure the Service History is documented, as a consistent paper trail is your best friend when looking at these high-performance machines.
Treat the car to a warm-up period; always keep engine revs modest until the oil temperature reaches its operating range.
Estimated repair costs if issues arise
While the facelift models are generally considered more robust, if the car has a high-performance history, it is worth keeping a fund aside for a potential head bolt refresh to ensure long-term peace of mind.
The C63 is a heavy, powerful car, and the Performance Package Plus brakes are top-tier. When the time comes for a full set of pads and rotors, it is wise to be prepared for the premium cost of genuine or high-quality aftermarket parts.
If you notice a slight ticking sound on cold start that doesn't disappear, it may indicate that the hydraulic lifters or cam adjusters are due for attention, a common procedure for M156 engines with significant mileage.
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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