2002 — 2005
S 350 3.7L V6 - Standard Luxury
Petrol
Cycle through every Airmatic suspension setting while stationary and then on the move. Listen for any persistent whirring from the pump or uneven ride heights, as the air struts can occasionally show signs of wear in cars of this age.
Observe the transmission performance during slow-speed shifts. Ensure the transition between gears is smooth without any hesitation or flaring, as the 7G-Tronic gearbox benefits greatly from regular fluid changes.
Operate every single electrical feature including the seat adjustments, door soft-close mechanisms, and the COMAND system. These sophisticated electronics appreciate a healthy battery and wiring harness, which can be checked for signs of age.
Inspect the underside and wheel arches for any signs of surface oxidation. While NZ-delivered examples are often well-cared for, it is good practice to check the body integrity in areas prone to moisture retention.
Usually marks the interval for the spark plug replacement and secondary transmission service.
A common point to review the condition of suspension bushings and control arms to maintain that signature smooth ride.
Often considered the time to confirm the health of the alternator and starter motor components.
Prioritise regular engine oil and filter changes using high-quality synthetic lubricants to keep the V6 engine internals clean and happy.
Keep an eye on the transmission fluid service history; fresh fluid is a great way to ensure the gearbox continues to operate with factory smoothness.
Regularly clear out the cabin air intake vents of leaves and debris to prevent moisture buildup and keep the interior environment fresh.
Ensure the coolant system is flushed according to schedule to protect the aluminium components of the engine block.
Periodically check and clean the drainage channels around the sunroof and scuttle panel to prevent water ingress into the cabin electronics.
Estimated repair costs if issues arise
If you notice the car sits lower than usual after being parked, you might eventually need to budget for strut replacement. This is a common wear item, and proactive maintenance keeps the ride quality at its best.
Depending on the car's history, you might eventually need to budget for a valve body refurbishment if shifting becomes less than seamless, which is a common way to refresh the shifting performance.
If you feel a slight vibration at idle, it's common to consider refreshing the engine and transmission mounts. Replacing these restores the cabin to its intended whisper-quiet, vibration-free state.
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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