Audi A6 Allroad, 4A (EU)

Automatic transmission fluid capacity & service interval

Audi A6 Allroad, 4A (EU) requires automatic transmission fluid with a capacity range of 3,5 to 9 liters. The service interval is 60000 km. The data covers 11 configurations.

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

TypeSpecifications
  • A6 Allroad 45 TDI quattro (180 kW) (2021- )
  • S tronic, clutch part
  • Use: Normal
  • Capacity 4,35 liter (Dry fill)
  • Capacity 3,5 liter (Service fill)
  • Change 60000 km
  • Code: 0HL
  • A6 Allroad 45 TDI quattro (180 kW) (2021- )
  • S tronic, transmission part
  • Use: Normal
  • Capacity 3,8 liter (Dry fill)
  • Code: 0HL 7/1
  • A6 Allroad 40 TDI quattro (150 kW) (2020- )
  • Clutch part
  • Use: Normal
  • Capacity 4,35 liter (Dry fill)
  • Capacity 3,5 liter (Service fill)
  • Change 60000 km
  • Code: 0CJ, 0CL (DL382) 7/1
  • A6 Allroad 40 TDI quattro (150 kW) (2020- )
  • Transmission part
  • Use: Normal
  • Capacity 3,8 liter (Dry fill)
  • Code: 0CJ (DL382) 7/1
A6 Allroad 50 TDI quattro (210 kW) (2020- )
  • Use: Normal
  • Capacity 9 liter
  • Code: 0D5 8/1
A6 Allroad 55 TDI quattro (253 kW) (2020- )
  • Use: Normal
  • Capacity 9 liter
  • Code: 0D5 8/1
A6 Allroad 45 TDI quattro (170 kW) (2019-2021)
  • Use: Normal
  • Capacity 9 liter
  • Code: 0D5 8/1
A6 Allroad 50 TDI quattro (210 kW) (2019-2020)
  • Use: Normal
  • Capacity 9 liter
  • Code: 0D5 8/1
A6 Allroad 55 TDI quattro (257 kW) (2019-2020)
  • Use: Normal
  • Capacity 9 liter
  • Code: 0D5 8/1
  • A6 Allroad 55 TFSI quattro (250 kW) (2019- )
  • S tronic, clutch part
  • Use: Normal
  • Capacity 4,35 liter (Dry fill)
  • Capacity 3,5 liter (Service fill)
  • Change 60000 km
  • Code: 0HL
  • A6 Allroad 55 TFSI quattro (250 kW) (2019- )
  • S tronic, transmission part
  • Use: Normal
  • Capacity 3,8 liter (Dry fill)
  • Code: 0HL 7/1

Additional Notes

  • The Audi A6 Allroad 4A carries two distinct automatic transmission types across engine variants: a conventional automatic and a semi-automatic S tronic dual-clutch unit. The 45 TDI (170 kW), 50 TDI (210 kW), 55 TDI (253 kW), and 55 TDI (257 kW) all use the conventional automatic, while the 40 TDI (150 kW), 45 TDI (180 kW), and 55 TFSI (250 kW) use the S tronic.
  • The conventional automatic transmission across the TDI variants carries a single listed capacity of 9 liters, with no distinction between dry fill and service fill. A single undifferentiated capacity figure typically indicates the specification applies to a complete overhaul or full drain-and-fill procedure rather than a partial fluid exchange.
  • The S tronic transmission is split into two separate fluid circuits for specification purposes: a clutch part and a transmission part. Each circuit holds its own fluid volume and is serviced independently, which is characteristic of dual-clutch gearboxes where the wet clutch pack and the gear set operate in separate oil baths.
  • For the S tronic clutch part on the 40 TDI (150 kW), 45 TDI (180 kW), and 55 TFSI (250 kW), the dry fill capacity is 4.35 liters while the service fill capacity is 3.5 liters. The 0.85-liter difference between dry and service fill reflects residual fluid that remains in the circuit during a standard drain, meaning a full overhaul from empty requires noticeably more fluid than a routine service.
  • The S tronic transmission part carries a dry fill capacity of 3.8 liters across all three S tronic variants. No service fill figure is listed for the transmission part, suggesting the gear set circuit is not routinely drained during standard maintenance intervals.
  • The S tronic clutch part on all three variants shares a 60,000 km change interval under normal use conditions. No change interval is listed for the transmission part, consistent with the absence of a service fill value for that circuit.
  • The 55 TDI variant appears in two separate power outputs within the specifications: 257 kW covering 2019-2020 and 253 kW from 2020 onward. Both share the same 9-liter automatic transmission capacity, indicating the transmission specification was unchanged despite the output revision.
  • The 50 TDI (210 kW) appears across two overlapping row entries, one covering 2019-2020 and one from 2020 onward, both with a 9-liter automatic transmission capacity. The split into separate rows reflects a production or specification revision at the 2020 model year boundary rather than any change in fluid volume.

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