DS 3: AdBlue® (BlueHDi) / SCR system

Using a liquid called AdBlue® that contains urea, a catalytic converter turns up to 85% of the nitrogen oxides (NOx) into nitrogen and water, which are harmless to health and the environment.

The AdBlue® is contained in a special tank holding about 15 litres.

Its capacity allows a driving range of approximately 4,000 miles (6,500 km), which may vary considerably depending on your driving style.

An alert system is triggered once the reserve level is reached: it is then possible to drive for a further 1,500 miles (2,400 km) before the tank is empty and the vehicle is immobilised.

For more information on the Warning and indicator lamps and the associated alerts, or the Indicators, please refer to the corresponding sections.

Once the AdBlue® tank is empty, a device required by law prevents the engine from being restarted.

If the SCR system is faulty, the level of emissions from the vehicle will no longer meet the Euro 6 standard and the vehicle starts polluting the environment.

In the event of a confirmed SCR system malfunction, it is essential to visit a dealer or a qualified workshop. After 685 miles (1,100 km), a device is automatically activated to prevent the engine from starting.

In both cases, a range indicator indicates the distance that can be travelled before the vehicle is stopped.

Freezing of the AdBlue®

AdBlue® freezes at temperatures below around -11°C.

The SCR system includes a heater for the AdBlue® tank, allowing you to continue driving in very cold conditions.