2003 — 2014
V350 3.5L - V6 petrol (Avantgarde/Ambiente)
Petrol
Listen for erratic shifting or surging while accelerating at low speeds. | Description: The 5-speed automatic transmission in the W639 can sometimes show signs of wear in the valve body or torque converter in higher-mileage examples.
Park on a flat surface and leave the engine idling for 10 minutes. | Description: Monitor the engine temperature gauge and listen for any rough idle, as the M272 V6 engine can occasionally exhibit issues with balance shaft wear or intake manifold flap linkage failures.
Toggle all electrical sliding doors and power windows repeatedly. | Description: Electronic gremlins are not uncommon in these vans; ensure the sliding door tracks are free of debris and that the motors operate without whining or stalling.
Perform a series of sharp turns at low speed to check for suspension clunks. | Description: Front-end components like sway bar links and control arm bushings often require refreshing on these heavier vehicles to maintain that smooth Mercedes ride quality.
Time to inspect suspension bushings and potential engine mount fatigue.
Recommended interval for transmission fluid and filter service to ensure longevity.
Consider a proactive check of the cooling system components, including the water pump and thermostat housing.
Verify the service history confirms the use of Mercedes-approved engine oil to keep the V6 internals happy.
Check the condition of the cabin air filter to ensure the HVAC system remains free of odors.
Inspect the undercarriage for any surface corrosion, which is always good practice for imported NZ vehicles.
Ensure the spare tyre and jack kit are present and the winch mechanism for the spare works smoothly.
Confirm the air-conditioning system is serviced, as these larger cabins can be quite challenging for older systems to cool on a hot NZ summer day.
Estimated repair costs if issues arise
If you notice a check engine light or a slight loss in power, it is worth checking the intake manifold linkage. This is a common point of wear, and replacing the manifold or the repair kit is a standard maintenance task for this engine series.
If the previous owner hasn't documented a transmission service, it is highly recommended to budget for a fluid and filter flush to protect the gearbox components.
If the van sits lower on one side after being parked, the air suspension bags may be reaching the end of their lifespan. This is quite common for the Avantgarde trim and is a straightforward replacement.
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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