2005 — 2007
3.0L V6 (M272)
Petrol
Check engine for 'check engine' light and scan for P0016/P0017 codes. | Note: The M272 engine suffers from premature balance shaft gear wear; if the code is present, walk away.
Perform a cold start and listen for a metallic rattling sound. | Note: Listen specifically for timing chain tensioner or cam adjuster rattle during the first 5 seconds of ignition.
Test the transmission shift quality between 1st, 2nd, and 3rd gears. | Note: Look for harsh shifts or 'flaring' caused by the Valeo radiator issue, which can allow coolant to contaminate transmission fluid.
Inspect the underside for oil leaks near the 'V' of the engine. | Note: The oil separator (breather covers) often leaks, dripping oil onto the exhaust manifold and creating a burning smell.
Ensure standard A-service is logged; inspect for any minor trim rattling common in early W203 facelifts.
Crucial transmission fluid and filter change; inspect engine mounts and suspension control arms for fatigue.
Major service point: spark plugs, drive belt, tensioners, and potential cooling system overhaul including the thermostat.
Replace transmission fluid and filter (every 60,000km).
Monitor engine coolant for signs of transmission fluid contamination.
Renew engine oil using MB-approved 229.5 spec synthetic only.
Check and replace worn control arm bushings and ball joints.
Inspect intake manifold linkage for plastic breakage (a common M272 fault).
Estimated repair costs if issues arise
High priority; requires engine-out service.
Failure causes rough idle and poor performance.
Standard wear item for heavy V6 models.
Necessary if shifting issues persist after fluid flush.
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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