2006 — 2013
S 350 3.5L V6 - Standard Luxury
Petrol
During your test drive, find a flat, quiet stretch of road and check that the Airmatic suspension holds its height level after the car has been parked for an hour; sagging corners can be a sign that the strut seals are beginning to reach the end of their service life.
While moving slowly at full lock, listen for any clicking or clunking from the front end, as the control arm bushings and ball joints are common items that may show wear in these heavy luxury cruisers as they age.
Check the COMAND infotainment system by scrolling through every menu while the engine is running; intermittent glitches or frozen screens can sometimes point to aging electronic control modules or battery voltage fluctuations.
Before starting the cold engine, check the service history for recent transmission fluid changes, as the 7G-Tronic gearbox benefits significantly from timely maintenance to ensure smooth shifting over long-term ownership.
Usually marks the period where original suspension components and engine mounts may start showing their age.
A common interval to verify the status of the alternator, starter motor, and potential secondary cooling system hoses.
The stage where you should ensure the timing chain and tensioners have been inspected for any rattling during cold starts.
Prioritise a specialist pre-purchase inspection from someone familiar with Mercedes-Benz diagnostics.
Ensure all air suspension functions (sport vs. comfort) cycle properly during your test.
Confirm the air conditioning system blows ice-cold, as these systems are complex to service.
Check for any signs of water ingress in the footwells or trunk, ensuring drain channels are clear.
Verify that the battery is healthy, as these cars are very sensitive to even minor voltage drops.
Estimated repair costs if issues arise
If the vehicle begins to struggle with ride height, you might eventually need to budget for replacing the air struts, which is a key part of maintaining that signature 'magic carpet' ride.
To keep gear changes smooth, consider planning for a transmission fluid and filter service if it hasn't been documented recently; it is proactive insurance for the gearbox longevity.
As these are heavy V6 engines, the rubber mounts eventually compress; if you notice a slight vibration at idle, this is a common task to budget for to restore cabin serenity.
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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