2013 — 2020
3.0L Inline-6 Turbo Diesel (S350d) - Torque-heavy efficiency
Diesel
Cycle through the Airmatic suspension settings while parked and moving; listen for any persistent hissing sounds or uneven ride height leveling that might suggest a leaky strut or compressor fatigue.
Observe the dashboard for any flickering in the dual widescreen display clusters, as internal wiring or cooling fan issues can occasionally present as intermittent blackouts or glitches in units of this age.
Pay close attention to the 9G-TRONIC transmission shifts during low-speed crawling; a slight hesitation when cold is sometimes noted, but any clunking or flare during gear changes is worth investigating further with a pre-purchase inspection.
Operate the panoramic sunroof and all soft-close door mechanisms repeatedly; these convenience features rely on complex motors and vacuum lines that benefit from regular lubrication and maintenance.
Consider a full transmission service and fluid flush to maintain smooth shift quality.
Time to inspect suspension bushings and potential brake rotor thinning.
Evaluate the condition of the turbocharger hoses and the diesel particulate filter (DPF) soot loading levels.
Keep up with the strict oil change intervals, ideally every 10,000 to 15,000km using the manufacturer-approved specification.
Ensure the AdBlue tank is topped up regularly to prevent crystallization issues in the SCR system.
Check the condition of the cabin air filtration system to keep the climate control and ionizer working effectively.
Periodically clear the sunroof drains to prevent water ingress, which can affect the sensitive electronics housed in the floor channels.
Use a reputable diagnostic scanner to check for hidden shadow codes that might not trigger a dashboard warning light.
Estimated repair costs if issues arise
While these provide a world-class ride, the rubber air bellows can eventually degrade due to age and debris. It is common to plan for a potential strut replacement as the vehicle moves toward higher mileage.
Diesel systems rely on specific heat cycles; if the vehicle has been used for short trips, you might eventually need to budget for a professional DPF clean or sensor replacement to maintain efficiency.
The W222 is a marvel of technology. Depending on the car's history, you might eventually need to budget for troubleshooting minor control module glitches that can occasionally crop up in luxury vehicles.
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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