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Coolant Level, Checking And Filling

-- Check the coolant level in the coolant reservoir when the engine is cold.

Fig 1: Coolant Reservoir Fluid Level Markings
GWWA02-0303Courtesy of AUDI OF AMERICA, LLC

-- If coolant level is too low, fill with coolant mixture.

Mixture Ratio

Freeze protection to Coolant additive Water
-25°C (-13°F) approximately. 40 % approximately. 60 %
-35°C (-31°F) approximately. 50 % approximately. 50 %
-40°C (-40°F) approximately. 60 % approximately. 40 %
NOTE:

Determine cause of fluid loss, which cannot be attributed to normal use and repair.