2017 — 2018
3.0L Turbo - E400
Petrol
While accelerating steadily, feel for any slight hesitation in the 9G-TRONIC transmission; in cars of this age, it's worth noting if shifts feel crisp or if they drag, as software updates can sometimes smooth things out.
Check the Airmatic suspension by toggling the ride height button while parked; listen for a quiet compressor hum and ensure the vehicle rises and lowers evenly without any warning lights.
Listen for any faint rattling noises upon a cold start, as it is common to consider the longevity of the timing chain components on the M276 V6 engine once the vehicle reaches higher kilometers.
Navigate through the COMAND or MBUX infotainment menus while stationary; ensure the scroll wheel and touchpad respond consistently, as connectivity modules can occasionally show signs of age.
Usually marks the point where spark plugs and transmission fluid service should be prioritized for long-term engine health.
A common interval to inspect the condition of suspension bushings and engine mounts for any signs of perishing.
Consider having the cooling system inspected, specifically looking at hoses and the water pump for any minor seepage.
Verify the presence of a comprehensive service history, ideally performed by a Mercedes-Benz specialist.
Check that the panoramic sunroof seals are clean and debris-free to ensure smooth operation.
Ensure the vehicle has had regular brake fluid flushes, which are crucial for maintaining the E400's stopping power.
Confirm the air suspension compressor hasn't been overworking by checking for any stored fault codes during a pre-purchase inspection.
Look for consistent tire wear patterns, as the alignment on these vehicles can be sensitive to the diverse road surfaces we experience in NZ.
Estimated repair costs if issues arise
If you notice the vehicle sitting unevenly after being parked for a few days, you might eventually need to budget for replacement air struts or the compressor unit.
To keep the 9-speed transmission shifting smoothly, it's proactive to plan for a professional fluid and filter exchange if it hasn't been documented recently.
If you feel a slight vibration through the steering wheel or floor at idle, it is common to consider replacing the hydraulic engine mounts to restore that signature Mercedes smoothness.
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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