Mercedes-Benz C-Class, W203 / S203 / CL203 (EU)

Additional Notes

• All transfer case (transferbox) entries across the Mercedes-Benz C-Class W203/S203/CL203 4MATIC range share an identical fluid capacity of 0.59 liters, indicating a compact unit consistent with the transfer cases found in passenger car-based all-wheel-drive systems rather than larger truck-derived assemblies.
• The 0.59-liter figure represents a service fill capacity, meaning the volume required when draining and refilling the unit during a fluid change, not a total system volume that would apply during a full overhaul or component replacement.
• Every listed 4MATIC variant carries a "first change only" designation, meaning the 60,000 km interval applies solely to the initial fluid service and no subsequent scheduled transfer case fluid changes are specified in the data.
• The 60,000 km change interval tied to the "first change only" condition reflects a break-in service practice, where initial fluid replacement removes fine metallic particles generated during the early wear-in period of new gear and bearing surfaces.
• The C 240 4MATIC (203.081/281) and C 320 4MATIC (203.084/284) cover the 2000-2004 model years, while the C 280 4MATIC (203.092/292) and C 350 4MATIC (203.087/287) represent the 2005-2007 period, reflecting the mid-cycle engine lineup changes within the W203 generation.
• Despite the engine displacement differences between the C 240, C 280, C 320, and C 350 variants, the transfer case fluid capacity and service interval remain uniform at 0.59 liters and 60,000 km, indicating the same transferbox unit was used across all 4MATIC applications in the W203 series.
• The chassis codes 203.081/281, 203.084/284, 203.092/292, and 203.087/287 follow Mercedes-Benz's internal numbering convention where the suffix differentiates body styles, with the 203.0xx codes corresponding to the sedan (W203) and 203.2xx codes to the estate (S203) variants sharing the same drivetrain specifications.