2006 — 2012
2.7L XDi (121kW) - 4WD (Part-time/TOD)
Diesel
Listen for heavy thuds or rattling when navigating NZ roundabouts or uneven suburban roads, which can suggest that the heavy-duty suspension bushings or ball joints may be nearing the end of their service life.
Observe the dashboard for any glow plug warnings and listen for a rough idle during a cold start, as these 2.7L engines sometimes require attention to the glow plugs or fuel injectors in their later years.
Engage the 4WD selector on a soft surface and check for prompt engagement; if it struggles to lock, it is common to consider whether the vacuum-operated front hubs require a seal refresh.
Pay close attention to the smoothness of the automatic gear shifts; if you feel a 'shudder' or hesitant shifting, it might indicate that the transmission's internal conductor plate is ready for a professional inspection.
Major service interval including transmission fluid replacement and a thorough check of the common rail fuel system components.
Review of the cooling system, including the water pump and radiator hoses, which are vital for maintaining the 5-cylinder diesel's longevity.
Comprehensive suspension overhaul recommended, alongside an inspection of the turbocharger health and intercooler piping.
Evaluation of the timing chain tensioner and a detailed inspection of the high-pressure fuel pump for any signs of wear.
Prioritize high-quality diesel fuel filters every 20,000km to protect the sensitive Bosch common rail system.
Maintain a regular oil change schedule every 10,000km using the correct Mercedes-Benz specification synthetic oil.
Periodically clear the EGR valve to prevent carbon buildup, which can affect fuel economy on longer NZ road trips.
Check the condition of the vacuum lines that control the turbo and 4WD system for any perishability due to engine bay heat.
Inspect the chassis and underbody for any signs of surface rust, particularly if the vehicle has been used near NZ's coastal areas or for boat launching.
Estimated repair costs if issues arise
In cars of this age, the fuel injectors may eventually require servicing to maintain optimal spray patterns and engine efficiency. Depending on the car's history, you might eventually need to budget for professional cleaning or replacement.
If the transmission experiences electrical communication issues or goes into 'limp mode', the internal conductor plate (sourced from Mercedes-Benz) may need replacing. This is a common maintenance item for this specific gearbox type.
Given the Rexton's significant weight, the front-end suspension components work hard. If the car feels 'vague' on the road, budgeting for a comprehensive front-end refresh will restore the original handling characteristics.
As these vehicles approach higher mileages, the turbocharger may exhibit wear. If a loss of power or increased oil consumption is noted, you should plan for either a rebuild or a new unit to keep the XDi engine performing correctly.
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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