Audi A4, S4, RS 4, 8K (EU)

Additional Notes

• The Audi A4 2.0 TFSI quattro transfer case fluid capacity of 1 liter applies consistently across three successive power output variants spanning 2008-2016, covering the 155 kW (2008-2012), the revised 155 kW (2012-2013), and the 162 kW (2013-2016) configurations, all sourced from automatic transmission-driven transfer boxes.
• The A4 3.0 TDI quattro at 155 kW (2008-2009) shares the 1 liter transfer case capacity with the 2.0 TFSI quattro variants, despite being a diesel engine with a different drivetrain character.
• The A4 3.0 TDI quattro at 176 kW (2008-2009) carries a transfer case fluid capacity of 0.5 liter, half the volume of the 155 kW diesel variant produced in the same years, indicating a different transfer box unit despite the shared model year range.
• The A4 3.2 FSI quattro (2007-2012) also uses a 0.5 liter transfer case capacity, matching the 176 kW diesel rather than the 2.0 TFSI quattro, which points to a physically smaller or differently designed transfer box assembly behind the automatic gearbox in that petrol configuration.
• All six configurations listed carry a normal use condition designation, meaning the stated capacities apply under standard operating conditions rather than severe-duty or first-fill scenarios.
• The note "transferbox, from automatic" present across all rows indicates these fluid capacities apply specifically to transfer cases paired with automatic transmissions, distinguishing them from any manual transmission-derived quattro drivetrain variants.
• A transfer case service fill of 0.5 liter, as seen in the 3.0 TDI 176 kW and 3.2 FSI quattro rows, is a relatively small fluid volume, consistent with compact, single-speed transfer boxes used in longitudinal all-wheel-drive platforms where the unit primarily distributes torque rather than providing range selection.