2007 — 2011
3.0L V6 (M272) - C300 Sport
Petrol
Check the idle and acceleration | Observation: While driving, observe if the engine feels sluggish or hesitant when climbing hills. The M272 engine can occasionally suffer from worn intake manifold flaps, which may affect performance.
Check the 7G-Tronic transmission | Observation: During low-speed stop-start traffic, pay attention to the gear shifts. If they feel firm or hesitant, it is common to consider whether a transmission fluid service or a reset of the adaptive transmission settings is required.
Check the balance shaft gear status | Observation: Verify the engine number against Mercedes databases, as some early production M272 engines may have concerns with balance shaft gear wear. Check service history for any record of this work being addressed.
Check the panoramic sunroof operation | Observation: Open and close the sunroof fully while stationary to ensure it does not bind or rattle. Dirt buildup in the tracks is common in NZ conditions and often requires simple cleaning to prevent motor strain.
Usually marks the time to inspect suspension bushings and engine mounts for typical wear.
A common point where transmission fluid and filter service is recommended if not already completed.
Consider having a specialist inspect the cooling system components, such as the water pump and thermostat, as preventive maintenance.
Ensure regular oil changes using Mercedes-approved synthetic fluids every 10,000km to keep the V6 internals happy.
Monitor the engine coolant levels regularly, as older rubber hoses can eventually become brittle over time.
Keep the cabin air filter clean to ensure your climate control system functions efficiently during our damp winters.
Regularly inspect the condition of your tyres, as these powerful rear-wheel-drive sedans can be sensitive to alignment issues.
Have the brake fluid flushed every two years to maintain pedal feel and system longevity.
Estimated repair costs if issues arise
If you notice a loss of low-end torque, the plastic linkages within the manifold might be wearing out. Budgeting for this ensures you aren't caught off guard if the intake unit needs a refurbishment.
It is quite normal for these to soften over high mileage, leading to subtle vibrations at idle. Setting aside a contingency fund for these allows you to keep that classic Mercedes smooth ride quality.
NZ roads can be quite demanding. Eventually, the front control arm bushings may show signs of wear, which might be noticed during your next Warrant of Fitness. Planning for this helps maintain precise steering.
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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