2006 — 2013
3.5L V6 - S350
Petrol
When idling in Park or Neutral, carefully listen for any rattling or ticking sounds coming from the front of the engine. | Note: On the M272 V6 engines, it is worth keeping an eye on the timing chain tensioner and balance shaft gears, as they can sometimes show signs of wear in higher-mileage examples.
Adjust the air suspension settings through the centre console menu and observe if the vehicle lifts or lowers without any warning lights appearing on the dash. | Note: Airmatic suspension is brilliant for comfort, but as the system ages, it is common to consider the health of the air struts and compressor.
Test the operation of every electric seat, window, and mirror adjustment button while the engine is running. | Note: The S-Class is packed with complex electronics, so it is a good idea to ensure all modules are communicating well and that no door controller issues are present.
During your test drive, find a quiet stretch of road and perform a controlled braking test to ensure the car stays straight and the pedal feels firm. | Note: The S350 is a heavy vehicle, so checking the condition of the brake rotors and pads is essential for your peace of mind.
Usually marks the time to review the condition of ignition coils and spark plugs to maintain that smooth V6 performance.
Often the stage where professional preventative maintenance on the 7G-Tronic transmission fluid and filter is recommended.
A common point to have a technician inspect the condition of suspension bushings and engine mounts for continued ride refinement.
Verify the service book shows consistent oil changes using high-quality synthetic lubricants.
Inspect the cabin air filters to ensure the climate control system remains efficient and fresh.
Check for any signs of water ingress in the boot or footwells, which can affect electrical looms.
Confirm that the battery health is strong, as these cars are quite sensitive to voltage drops.
Review the history for a recent brake fluid flush, which is vital for the S-Class braking system longevity.
Estimated repair costs if issues arise
If you notice the car sits lower after sitting for a few days, it may indicate a slow leak in an air strut. Depending on the car's history, you might eventually need to budget for strut replacement or compressor servicing.
To keep gear shifts buttery smooth, the transmission fluid and filter require periodic attention. If this component needs attention in the future, it is a wise investment to ensure the long-term health of the gearbox.
Over time, the rubber in these mounts can soften, which might lead to slight vibrations at idle. If you feel more cabin vibration than expected, you might want to budget for a refresh of these mounts.
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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