Fendt 800 Vario S4

AdBlue (DEF) capacity & service interval

The Fendt 800 Vario S4 uses AdBlue (DEF) fluid with a capacity of 52 liters. The data covers 8 configurations of this model.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

The Fendt 800 Vario S4 AdBlue system uses selective catalytic reduction (SCR), a technology that injects diesel exhaust fluid into the exhaust stream to convert nitrogen oxides into nitrogen and water vapor, reducing harmful emissions.
All eight configurations across the 822, 824, 826, and 828 Vario S4 variants share a uniform AdBlue tank capacity of 52 liters, indicating a standardized tank design across the model range.
A 52-liter AdBlue capacity is relatively large by agricultural equipment standards, reflecting the extended field operation cycles typical of high-horsepower tractors where frequent refilling would be impractical.
Each variant appears in two distinct serial number series: one beginning at 0101 with a 2016 start year, and one beginning at 00F05001 with a 2018 start year. Both series carry identical 52-liter capacity specifications for their respective models.
The serial number prefix structure, such as 839/../0101 for the 822 Vario S4, follows Fendt's convention where the middle segment identifies individual unit numbers, allowing precise production traceability within each model designation.
All capacity values are listed under normal use conditions, meaning the 52-liter figure applies to standard operating environments rather than severe-duty or special-application scenarios.