2010 — 2016
3.0L OM642 V6 - E350 BlueTEC Diesel
Diesel
Check the transmission during the test drive by feeling for smooth shifts, particularly between 1st and 2nd gear, as the 7G-Tronic transmission benefits from consistent fluid servicing.
Listen for cold-start rattles by asking the seller to leave the engine stone cold before you arrive; this helps identify potential timing chain wear or hydraulic lifter noise.
Inspect the V-bank area by removing the plastic engine cover to look for signs of oil leaking from the turbocharger intake seal, which is known to drip onto the swirl motor linkage.
Verify the operation of the air suspension (if fitted) by measuring the ride height on level ground after the car has been parked for a few hours to ensure one corner isn't sagging.
Usually marks the point where the original suspension components, such as control arm bushings, begin to show signs of fatigue on NZ roads.
A common window where the DPF (Diesel Particulate Filter) may require a professional forced regeneration or a specialized clean to maintain efficiency.
The stage where you might consider a proactive cooling system refresh, including the thermostat and water pump, to ensure long-term reliability.
Verify that the transmission fluid and filter have been changed at least every 60,000km, as this is vital for the 7G-Tronic longevity.
Ensure the oil cooler seals have been addressed; these are notorious for leaking over time and are best managed by a specialist who knows the OM642 engine.
Check for a consistent history of high-quality engine oil changes; these engines perform best when using low-ash synthetic oils specifically approved by Mercedes-Benz.
Confirm the air filter housing clips are intact and the intake pipes are seated correctly, as dust ingress can be hard on the turbocharger.
Inspect the brake rotors and pads, noting that due to the E350's weight and power, these components often require maintenance more frequently than lighter vehicles.
Estimated repair costs if issues arise
Because these seals are located deep in the 'V' of the engine, the labour involved is significant. It is worth budgeting for this if you see any signs of oil pooling in the engine valley.
If your car features Airmatic suspension, these struts can eventually develop small leaks as the rubber bellows age. Having a contingency fund for one or two corners is a sensible approach.
The electronic motor that controls the intake manifold flaps can occasionally fail due to heat or oil contamination. If this happens, your dashboard may light up; it's a manageable repair but worth keeping in the back of your mind.
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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