Audi A4, S4, 8K / B8 (USA)

Additional Notes

• The Audi A4 2.0 TFSI quattro (155 kW) covering 2008-2010 carries a 10.4-liter initial fill capacity with no separate refill figure listed, indicating the specification applies to a full transmission overhaul or dry fill rather than a routine fluid service top-up.
• From 2010 onward, the 2.0 TFSI quattro (155 kW) initial fill drops to 9 liters, and a distinct refill capacity of 3.6-4 liters appears for the first time. The refill range reflects the variable amount of fluid retained in the torque converter and passages during a service drain, which prevents a full evacuation of the system.
• The 2013-2016 A4 2.0 TFSI quattro (162 kW) reduces the initial fill further to 8.6 liters while retaining the same 3.6-4 liter refill range, suggesting a transmission unit with a marginally smaller total fluid volume than the 155 kW variant used in 2010-2013.
• Across all A4 2.0 TFSI quattro configurations, the first-check-only interval is set at 15,000 miles versus the 20,000-mile normal interval. The first-check-only condition targets the earliest scheduled inspection after a new fill, when fluid condition and level are verified before the standard recurring interval takes over.
• The time-based component of the check interval for the A4 2.0 TFSI quattro extends from 12 months in the 2008-2013 configurations to 24 months in the 2013-2016 (162 kW) configuration, applying equally to both the normal and first-check-only conditions for that later variant.
• The A4 Avant quattro 2.0 TFSI (155 kW) for 2008-2010 lists a 10.4-liter capacity without the "Initial fill" label seen on the sedan variant, though the value is identical. Both sedan and Avant share the same capacity figures and check intervals across all three generational configurations covered in the specifications.
• The Audi S4 (245 kW) uses a semi-automatic S tronic transmission that is serviced as two mechanically separate fluid circuits: a clutch part and a transmission part, each with its own capacity and, in the case of the clutch part, its own change interval.
• The S4 clutch part carries a 7.5-liter initial fill and a 6.7-liter refill. The relatively small difference between the two figures indicates that only a modest volume of fluid remains trapped in the system after a drain, making the S tronic clutch circuit more fully evacuated during service than a conventional torque-converter automatic.
• The S4 transmission part holds a 5-liter initial fill with no refill figure listed across both the 2009-2013 and 2013-2016 configurations, consistent with a sealed or check-only service approach for that circuit rather than a scheduled fluid exchange.
• The S4 clutch part specifies a fluid change at 40,000 miles under normal conditions and at 35,000 miles under the first-change-only condition. The first-change-only interval being shorter reflects a break-in service practice, where initial fluid contamination from component wear is addressed earlier than subsequent routine changes.
• For the S4 covering 2009-2013, both the clutch part and transmission part use a 12-month time limit alongside the mileage-based check intervals. The 2013-2016 S4 extends the time component to 24 months for both circuits, mirroring the same pattern seen in the A4 2.0 TFSI quattro (162 kW) of the same period.