Audi A6, S6, 4A (EU)

Automatic transmission fluid capacity & service interval

Audi A6, S6, 4A (EU) automatic transmission fluid capacity ranges from 2,7 to 7 liters. Service intervals include checks at 15000 km or 12 months and 30000 km or 12 months, with changes at 30000 km or 24 months and 60000 km or 48 months. The data covers 10 configurations.

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

TypeSpecifications
A6 2.5 TDI quattro (103 kW) (1995-1997)
  • Use: Normal
  • Capacity 2,7 liter
  • Check 30000 km/ 12 months
  • Change 60000 km/ 48 months
  • Code: 4/1
A6 2.0 (1994-1995)
  • Use: Normal
  • Capacity 3 liter
  • Check 30000 km/ 12 months
  • Change 60000 km/ 48 months
  • Code: 4/1
A6 2.0 16V (1994-1995)
  • Use: Normal
  • Capacity 3 liter
  • Check 15000 km/ 12 months
  • Change 30000 km/ 24 months
  • Code: 4/1
A6 2.3 (1994-1995)
  • Use: Normal
  • Capacity 3 liter
  • Check 30000 km/ 12 months
  • Change 60000 km/ 48 months
  • Code: 4/3
A6 2.5 TDI (103 kW) (1994-1997)
  • Use: Normal
  • Capacity 2,7 liter
  • Check 30000 km/ 12 months
  • Change 60000 km/ 48 months
  • Code: 4/1
A6 2.5 TDI (85 kW) (1994-1997)
  • Use: Normal
  • Capacity 2,7 liter
  • Check 30000 km/ 12 months
  • Change 60000 km/ 48 months
  • Code: 4/1
A6 2.8 V6 (1994-1997)
  • Use: Normal
  • Capacity 2,7 liter
  • Check 30000 km/ 12 months
  • Change 60000 km/ 48 months
  • Code: 4/1
A6 2.8 V6 quattro (1994-1997)
  • Use: Normal
  • Capacity 2,7 liter
  • Check 30000 km/ 12 months
  • Change 60000 km/ 48 months
  • Code: 4/1
S6 2.2 20V Turbo quattro (1994-1997)
  • Use: Normal
  • Capacity 7 liter
  • Check 15000 km/ 12 months
  • Change 30000 km/ 24 months
  • Code: 01F 4/1
S6 4.2 V8 32V quattro (213 kW) (1994-1997)
  • Use: Normal
  • Capacity 7 liter
  • Check 15000 km/ 12 months
  • Change 30000 km/ 24 months
  • Code: 01F 4/1

Additional Notes

  • The Audi A6 2.0 and A6 2.0 16V share the same 3-liter automatic transmission fluid capacity, yet the 16V variant carries a check interval of 15,000 km or 12 months against the standard 2.0's 30,000 km or 12 months. The 16V also requires a fluid change at 30,000 km or 24 months, half the 60,000 km or 48-month interval of the non-16V engine.
  • The A6 2.3 (1994-1995) matches the A6 2.0 exactly in both fluid capacity and service intervals, with a 3-liter fill, checks at 30,000 km or 12 months, and changes at 60,000 km or 48 months under normal use conditions.
  • All 2.5 TDI variants, covering both the 85 kW and 103 kW outputs as well as the quattro all-wheel-drive configuration, share a 2.7-liter automatic transmission fluid capacity. The slightly lower volume compared to the 3-liter petrol-engined A6 models reflects differences in the transmission unit fitted to the diesel powertrains.
  • The A6 2.8 V6 and A6 2.8 V6 quattro both carry a 2.7-liter capacity, aligning with the diesel variants rather than the smaller-displacement petrol engines. Both share the 30,000 km or 12-month check and 60,000 km or 48-month change schedule under normal conditions.
  • The S6 2.2 20V Turbo quattro and S6 4.2 V8 32V quattro stand apart from all A6 configurations with a 7-liter automatic transmission fluid capacity. A figure of this magnitude typically reflects a larger or more complex transmission assembly, such as a unit designed to handle significantly higher torque outputs.
  • Both S6 models share identical service intervals of 15,000 km or 12 months for checks and 30,000 km or 24 months for fluid changes under normal conditions. These intervals are more frequent than those applied to most A6 variants, which generally operate on a 30,000 km check and 60,000 km change schedule.
  • The A6 2.5 TDI quattro (103 kW) carries a 1995-1997 production window, starting one year later than the rear-wheel-drive 2.5 TDI variants, which begin in 1994. Despite the later start date, the quattro shares the same 2.7-liter capacity and identical service intervals as the non-quattro diesel models.

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