►Audi A6  ►Service and care  ►Checking and topping up fluids  ◀Selective catalytic reduction
On vehicles with selective catalytic reduction, a solution of urea (AdBlue) is injected into the exhaust system upstream of an NOx catalytic converter in order to reduce nitrogen oxide emissions.
The AdBlue is held in a separate tank on the vehicle. AdBlue consumption is approximately 0.5 - 2.5% of diesel fuel consumption.
As soon as a message appears in the instrument cluster display reminding you to refill AdBlue, you must refill the AdBlue tank or have this done by a qualified workshop ►Link.
Note
  • The instrument cluster display will tell you how far you can drive before the tank runs dry ►Link. If the AdBlue tank runs dry, the engine cannot be started again after you switch off the ignition.
  • The use of AdBlue for the operation of this vehicle is required by law.

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