2001 — 2005
2.7L I5 Turbo Diesel (120kW) - ML270 CDI 4MATIC
Diesel
While the engine is idling, listen for a distinct 'chuffing' sound and check for a black tar-like substance around the injectors under the plastic cover, as these can be signs that injector seals may eventually need attention.
During your test drive, find a safe spot to engage the 'Low Range' button; it is common to consider whether the transfer case motor is operating smoothly or if it might require a service from lack of use.
Check this by driving at various speeds and feeling for a 'rumble strip' sensation or hesitation during gear changes, which could indicate the transmission fluid or conductor plate might need a refresh in the future.
While parked, operate every single window switch and the central locking button multiple times to ensure the actuators and window regulators are functioning as expected for a vehicle of this vintage.
Often a good time to consider a comprehensive check of the cooling system components and diesel fuel lines for any signs of age.
At this stage, many owners plan for a suspension overhaul, specifically focusing on front ball joints and rear shock absorbers to maintain ride quality.
In cars of this age, it is common to assess the health of the turbocharger and the timing chain tensioner as part of long-term preventative care.
A milestone where a deep dive into the high-pressure fuel pump and alternator brushes is often recommended for continued reliability.
Confirm the 10,000km oil change interval has been strictly followed using high-quality synthetic oil.
Verify the date of the last automatic transmission service, including a filter and fluid change.
Inspect the serpentine belt and all pulleys for any signs of fraying or bearing noise.
Check that the brake fluid has been flushed within the last 24 months to protect the ABS pump.
Ensure the fuel filter has been replaced recently to protect the sensitive common-rail injection system.
Estimated repair costs if issues arise
Depending on the car's history, you might eventually need to budget for new copper washers and hold-down bolts to prevent carbon buildup on the cylinder head.
If the transmission begins to experience electronic glitches, the estimated cost in NZ for a replacement plate and fresh fluid is a wise future budget consideration.
To keep the W163 handling safely on NZ roads, you might eventually need to budget for replacing these heavy-duty wear items.
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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