2009 — 2011
6.2L M156 V8 - Naturally aspirated performance sedan
Petrol
While idling in park, listen closely for a light ticking sound from the valve covers; this can be a helpful indicator to check for M156 head bolt or cam adjuster wear history.
Find a quiet, flat stretch of road and perform a gentle acceleration test; observe if the 7G-Tronic transmission shifts smoothly or if there is any hesitation, which may suggest the adaptive transmission logic or valve body could use a service.
Before turning the engine on, inspect the air suspension by measuring the ride height at all four corners; it is wise to see if the vehicle sits level, as older pneumatic systems can sometimes show signs of minor leaks after sitting for extended periods.
During the test drive, gently apply the brakes at a moderate speed; pay attention to any steering wheel vibration or grinding, as these high-performance rotors are significant investments and worth assessing early.
Usually marks the time to consider a major transmission fluid flush and filter replacement.
A common point where the secondary air injection ports may start to carbon up; keeping an eye on engine management lights is a good habit.
Often when suspension components like control arm bushings or air struts might start showing their age.
A standard interval to have the cooling system, including the water pump and thermostat, reviewed for peace of mind.
Check the engine oil level regularly, as the M156 V8 is a performance engine that enjoys being kept topped up with high-quality synthetic oil.
Verify that the 'Service A' and 'Service B' logbook stamps are up to date, preferably with an independent Mercedes specialist.
Inspect the tyre tread depth across all four corners, as the power delivery of the E63 can be quite enthusiastic with its rubber.
Check the condition of the brake fluid, ensuring it has been flushed within the last two years to keep the pedal feel sharp.
Ensure the climate control is tested on both hot and cold settings to confirm the heater core and air conditioning compressor are operating comfortably.
Estimated repair costs if issues arise
In cars of this age, it is common to consider the status of the head bolts and cam adjusters. If this component needs attention in the future to ensure the longevity of your M156, the estimated cost in NZ is a significant job involving engine-out or top-end work.
Depending on the car's history, you might eventually need to budget for replacing the air struts if the pump begins to work harder than usual. It is helpful to plan for this as part of long-term ownership of the W212 platform.
The E63 uses substantial performance brakes. When these reach the end of their life, replacing the pads and rotors is a professional task that ensures the car stops as well as it accelerates.
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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