What is AdBlue®?

AdBlue® - also called diesel exhaust fluid - is an odourless, colourless, clean and non-toxic fluid that consists of 32.5% urea and 67.5% water.

As it's mostly water, AdBlue® freezes at -11°C (a 32.5% concentration is the lowest freezing-point of a urea water solution). So, to allow the vehicle to run under all conditions, all AdBlue® tanks have a heater that defrosts enough liquid to reduce emissions.