2020 — 2026
3.0L Inline-6 Turbo Diesel (S400d) - Advanced long-range diesel
Diesel
While at a standstill in a quiet area, engage the steering wheel buttons and the MBUX touchscreen extensively. | Observation: The W223 relies heavily on its digital ecosystem; ensure there is no lag or screen flickering, as the complex infotainment software can occasionally experience glitches in early-model units.
Check this by accelerating gently from a rolling stop to test the 9G-TRONIC transmission. | Observation: Be mindful of any inconsistent shift patterns, as the transmission calibration is highly sophisticated and may require a software update to smooth out occasional hesitation.
While driving over various road surfaces, listen for any muted knocking sounds from the suspension. | Observation: The air suspension system is incredibly comfortable, but it is worth noting that the components are complex, so any unevenness or audible noises might warrant a professional check.
Check this by opening and closing all four door handles multiple times while the vehicle is locked and unlocked. | Observation: The flush-fitting door handles are a signature feature, but the intricate electronic actuators can occasionally require minor alignment adjustments.
Usually marks the first major inspection of the complex 48V mild-hybrid system components.
A common point to review the longevity of the air struts and the DPF (Diesel Particulate Filter) system efficiency.
Typically when a proactive review of the secondary cooling systems and potential minor gasket maintenance is suggested.
Verify the digital service history is complete and stamped by Mercedes-Benz or a reputable specialist.
Ensure the AdBlue system has been topped up correctly during routine services to keep emissions hardware happy.
Confirm that the 48V electrical system has had any necessary software recalls completed by the manufacturer.
Check the condition of the brake pads and rotors, as the weight of the vehicle and the regenerative braking system can lead to specific wear patterns.
Inspect the tyres for even wear, as the advanced suspension geometry requires precise alignment to ensure longevity.
Estimated repair costs if issues arise
Given the premium nature of the W223's ride, the air springs and compressors are designed for durability, but it is wise to keep a buffer in your Future Budget Planning should the system require a refresh as the vehicle ages.
Because the cockpit is essentially a high-end computing suite, if a display module or specialized controller needs replacement, the cost reflects the advanced technology integrated into the dash.
The S-Class uses high-performance braking components that offer excellent stopping power; budgeting for premium pads and rotors ensures your braking remains as refined as the day it left the factory.
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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