2008 — 2011
2.5L (M272) - CLC 230 V6
Petrol
During the first 10 minutes, listen for any rattle from the engine bay at start-up; it is worth noting that early M272 engines can occasionally exhibit premature wear on the balance shaft sprocket.
While driving at low speeds, gently engage the transmission and monitor for any harsh gear changes; these 7G-Tronic units perform best with regular fluid changes, so any 'shunting' is worth investigating further.
Check the infotainment and electric seat adjustments by cycling through every function; common age-related wear often involves the SAM (Signal Acquisition Module) which manages the car's interior electrical distribution.
Before you pull away, inspect the engine oil level and look for signs of oil wicking into the wiring harness, specifically around the camshaft magnets, as this is a known quirk for this engine block.
Usually the time to ensure the transmission fluid and filter have been refreshed to maintain shift smoothness.
A common interval to check the condition of the engine mounts and transmission mounts, which can settle over time and increase vibration.
Often when suspension components like control arm bushings might start showing signs of fatigue, impacting handling precision.
Ensure the logbook shows regular oil changes using high-quality synthetic oil, as the M272 engine is sensitive to oil quality.
Ask the seller if the spark plugs have been replaced recently; with 6 cylinders, it is a task best performed on schedule to keep the engine running efficiently.
Check for a fresh warrant of fitness (WOF) and ask if any advisory notes were mentioned regarding bushes or boots.
Verify that the coolant has been changed periodically to protect the integrity of the radiator and engine cooling system components.
Keep a close eye on the tyre condition; these vehicles can be sensitive to alignment, and balanced tyre wear is a great indicator of a well-cared-for suspension.
Estimated repair costs if issues arise
If this component shows signs of wear, it requires significant labour as the engine often needs to be removed. It is worth confirming the engine number if you are concerned about this historical issue.
To keep that 7-speed gearbox shifting like new, you might eventually need to budget for a full fluid flush, filter replacement, and potentially a software adaptation reset.
After years of navigating New Zealand roads, you might eventually need to budget for the replacement of control arms or bushings to restore that solid Mercedes ride quality.
Depending on the car's history, you might eventually need to budget for replacing the cam magnets if you notice oil seepage or check engine lights related to camshaft timing.
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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