Audi A6 2004 2.0 diesel service and maintenance

Engine oil

Engine oil capacity: 4.3 litres (4.5 quarts)
Oil change interval is 15,000 km or one year, whichever comes first.
Recommended oil type (Oil Viscosity Classification SAE) is 5W-30

Timing belt

Manufacturers recommended timing belt replacement interval for Audi A6 2.0 diesel is 90,000 km.

Running your car in aggressive environments (e.g. salt, sand, etc.) causes timing belt to degrade faster and reduces its lifespan; under such conditions, the belt may need to be replaced sooner.

Engine coolant

Engine coolant (antifreeze) recommended replacement interval for Audi A6 2.0 diesel is 75,000 km or 5 years, whichever comes first.