2021 — 2026
S 450 3.0L L6 Mild Hybrid - Modern Executive
Petrol/Electric
Test the MBUX Infotainment response | Detail: During your drive, cycle through the menus quickly and use the voice assistant. In some units, software glitches can cause lag, so ensuring the system remains responsive under load is a smart move.
Evaluate the 48V Mild Hybrid transition | Detail: While accelerating and decelerating, pay close attention to the stop-start system and the transition between electric assistance and the internal combustion engine. It should be seamless; any shuddering might suggest the Integrated Starter Generator needs a closer inspection by a specialist.
Check the air suspension leveling | Detail: Park the vehicle on a level surface and check the ride height from all four corners. Modern air suspension systems are complex, and noticing a slight lean or a sluggish rise after starting the engine is something to monitor during your ownership.
Inspect the flush door handle mechanism | Detail: Operate the door handles multiple times while the car is both locked and unlocked. As these handles are motorized, ensuring they extend and retract without hesitation is a practical way to assess the health of the actuator assemblies.
Usually marks the first major inspection of the complex cooling circuits and electronic control units.
A common point to review the longevity of the air suspension bellows and the integrated hybrid battery health.
Typically recommended for a full transmission fluid service to ensure smooth shifts in the 9G-TRONIC system.
Always stick to the official Mercedes-Benz service intervals, as the modern L6 engine relies heavily on high-spec synthetic oils.
Keep an eye on the digital service history in the MBUX system to ensure all software updates have been applied by an authorized dealer.
Periodically check your coolant levels, as the mild-hybrid system has unique thermal management requirements.
Consider an annual professional inspection of the electronic sensors, especially if the car is kept in a coastal environment.
Maintain the car's battery charge if you aren't driving it daily, as modern executive cars have a high 'parasitic draw' due to their many onboard computers.
Estimated repair costs if issues arise
While these systems are incredibly comfortable, they are wear-and-tear items. Depending on the car's history, you might eventually need to budget for the replacement of air struts or the compressor unit.
The mild-hybrid components are sophisticated. If this component needs attention in the future, the estimated cost in NZ reflects the specialized labor and diagnostic tools required by authorized service centers.
Given the weight and performance of the S-Class, the braking system works hard. Budgeting for high-quality pads and rotors ensures the safety and performance remains at the level you expect from a Mercedes-Benz.
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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