2013 — 2020
3.0L V6 Twin-Turbo (S400) - Efficient performance
Petrol
While idling in Park, listen closely for a faint rattle from the engine bay. | Description: It is worth noting that the timing chain tensioners on the M276 engine can occasionally show signs of wear as mileage climbs, and a quick cold-start check is a sensible precaution.
Check the infotainment screen operation while driving. | Description: The COMAND system is sophisticated, but in cars of this age, it is common to consider whether the screen flickers or the controller dial has developed any lag, as these units can occasionally require a software refresh.
Navigate over a series of speed bumps or uneven pavement. | Description: The AIRMATIC suspension is incredibly comfortable, but do listen for any unusual hissing or thumping, as air struts are a complex system that may eventually require attention.
Switch between all drive modes and check the dashboard for any error messages. | Description: The W222 is packed with sensors, and it is a good idea to ensure all electronic systems are communicating clearly, as minor sensor fatigue is not uncommon in high-tech luxury vehicles.
Usually the time to inspect suspension bushings and ensure the transmission fluid has been serviced.
A common point where secondary cooling system components are often evaluated for long-term health.
A sensible window to verify the condition of the engine mounts and driveshaft flex discs to maintain that signature smooth Mercedes ride.
Verify the presence of a full service history, preferably from a Mercedes specialist.
Check that the panoramic sunroof seals are clean and the mechanism moves without hesitation.
Ensure all four tyres are of a reputable brand and have even tread wear.
Confirm that the 12V auxiliary battery is healthy, as it supports the extensive electrical architecture.
Inspect the under-carriage plastic shielding to ensure no clips have gone missing from previous servicing.
Estimated repair costs if issues arise
While these provide a legendary ride, if a strut eventually loses its seal, it is a significant job to replace. Future budget planning should account for this as part of long-term ownership of a luxury sedan.
To keep the W222 feeling like a vault, these mounts often need refreshing as the rubber ages. Depending on the car's history, you might eventually need to budget for these to maintain cabin refinement.
The 9G-TRONIC transmission is excellent, but it thrives on regular oil changes. If it hasn't been done recently, it is a wise investment to include in your initial purchase budget.
Noticed something inaccurate or missing?Suggest an edit→
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