How to Add Fuel Injector Cleaner to an Audi TT

1. Fill the Audi TT completely full with gas.
2. Insert the opening of the fuel injector cleaner bottle into the gas tank as if you were adding gas.
3. Pour the entire contents of the bottle into the gas tank. The fuel injector cleaner mixes with the gas in the tank, and works to clean the injection system as the gas is used.