Mercedes-Benz S-Class, W220 / V220 (EU)

Additional Notes

• The S 400 CDI (220.028/128) carries a 16.5-liter cooling system capacity, the largest among the W220/V220 variants listed. The S 320 CDI variants across both generation codes (220.025/125 and 220.026/126) share a 15.5-liter capacity, while the S 55 AMG and S 55 AMG Kompressor both sit at 13.5 liters.
• The 1-liter difference between the S 400 CDI and the S 320 CDI cooling system capacities reflects the larger displacement and additional thermal mass of the V8 diesel engine compared to the inline-six diesel unit.
• Despite the S 55 AMG Kompressor carrying a supercharged V8 producing significantly more heat load than the naturally aspirated S 55 AMG, both share an identical 13.5-liter cooling system capacity across their respective production spans of 2001-2002 and 2002-2005.
• All six configurations share a uniform change interval of 250,000 km or 180 months under normal use conditions. The 180-month figure equals 15 years, placing coolant renewal on an exceptionally long calendar-based cycle relative to many other vehicles.
• The dual-format interval of 250,000 km and 180 months means whichever threshold is reached first governs the service point. For lower-mileage vehicles, the 15-year calendar limit would typically be the determining factor before the distance threshold is met.
• The S 320 CDI with DPF (diesel particulate filter), code 220.025/125, shares its 15.5-liter capacity and 250,000 km/180-month interval with the non-DPF variant of the same chassis code, indicating the addition of the particulate filter did not alter cooling system volume or service scheduling for the 2002-2005 production period.
• The S 320 CDI transitioned from chassis code 220.026/126 (1999-2002) to 220.025/125 (2002-2005) without any change to the 15.5-liter cooling system capacity or the stated service interval, suggesting continuity in the underlying engine cooling architecture across the mid-cycle update.