Mercedes-Benz Citan, 420 (EU)

Additional Notes

• Across the Mercedes-Benz Citan 420 (EU) lineup introduced in 2021, manual transaxle fluid capacities are specified at either 2 liters or 1.5 liters, depending on the variant. The 2-liter figure typically represents a full drain-and-refill or overhaul fill, while the 1.5-liter figure reflects a partial service fill used when not all fluid is evacuated during a standard service.
• The dual capacity listings for the Citan 108 CDI (420.613/713) transaxle — 2 liters and 1.5 liters — indicate that the appropriate fill volume depends on whether the transmission is being serviced in place or fully disassembled. A full overhaul requires the larger 2-liter quantity to account for fluid retained in passages and components during normal service.
• The same dual-capacity pattern seen on the 108 CDI applies equally to the Citan 110 CDI (420.623/723) and the Citan 112 CDI (420.633/733), both of which list 2-liter and 1.5-liter transaxle capacities under normal use conditions. This consistency across the diesel variants suggests a shared or closely related transmission unit among the CDI models.
• The petrol-engined Citan 110 (420.653/753) and Citan 113 (420.663/763) each carry only a single transaxle capacity figure of 2 liters, with no 1.5-liter service-fill alternative listed. This contrasts with the CDI variants, where both capacity values appear.
• All transaxle fluid specifications across the Citan 420 range are designated for normal use conditions. No severe-duty or extended-interval alternative capacities are listed for any variant.
• The variant codes follow a consistent numbering structure: the 420.x13 suffix denotes one body configuration and 420.x23, 420.x33, and so on denote others, while the paired codes (e.g., 420.613/713) indicate that two body styles share identical transaxle fluid specifications.