AdBlue®
®
The SCR catalytic converter uses AdBlue® urea solution to convert nitrogen oxides into nitrogen and water. AdBlue
is a registered trademark and is also known as AUS32 or DEF (Diesel Exhaust Fluid).
Legal information
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No technical modifications which affect emission control by AdBlue may be made to the emission control system.
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Only operation with AdBlue that complies with ISO-22241-1 is approved by the manufacturer and corresponds to
the Certificate of Conformity issued for this vehicle type.
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Operating the vehicle without AdBlue that complies with ISO-22241-1 may be a criminal offence.
If the emission control system is not operated as intended, the exhaust emissions may become worse.
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Information on AdBlue
The AdBlue® consumption figures depend on the driving style, the operating temperature and the ambient
temperature.
You can check the remaining range and refill quantity on the instrument cluster display.
Because AdBlue® freezes at temperatures below -11°C(+13°F), there may be limitations when filling at very low
temperatures. While the vehicle is in motion, the system is heated to ensure effective emission control even at very
low temperatures. During prolonged spells of cold weather with temperatures below -11°C (+13°F), and in extremely
adverse conditions, it is possible that the AdBlue® cannot be defrosted and is not available for the emission control
system.
1. Stop the vehicle in a warm place.
2. Wait until the AdBlue® becomes liquid again.
3. If necessary, have refilling performed by a suitably qualified workshop.
AdBlue® must be refilled independently of the service events. This may be necessary more frequently and between
the service intervals.
The AdBlue® tank must never run empty→
.
Warning and prompting system with low fill level
Always add AdBlue® when a prompt to add it appears in the instrument cluster display.
AdBlue® in normal operating range. Remaining range of 2000 km or 2400 km(depending on equipment).
AdBlue® can be added, but it is not necessary.
As of a remaining range of 2,000 or 2400 km(depending on equipment), the instrument cluster display will indicate
that AdBlue® must be refilled. The respective remaining range at that time is indicated in this prompt.
If this prompt is ignored, the yellow indicator lamp lights up from aremaining range of 1,000 km. A message is
displayed on the instrument cluster with the warning that it will no longer be possible to restart the engine in
XXX km.
It will no longer be possible to restart the engine if the yellow indicator lamp is still ignored and the displayed
remaining range is 0 km. The red warning lamp lights up.
Warning and prompting system in the event of faults
If there is a fault in the exhaust gas purification system or if the tank has not been filled with standard-compliant
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