See also:

High outside temperatures
If DEF heats up to over 122 °F (50 °C) for extended periods, e.g. as a result of direct sunlight on the DEF reservoir, DEF can decompose. Ammonia vapors develop as a result. WARNING When o ...

Safety systems
Display messages (USA only) (Canada only) The red brake system warning lamp comes on while the engine is running. A warning tone also sounds. Possible causes/consequences and ► Soluti ...

Important safety notes
WARNING If you tow the vehicle, you must use a rigid towing bar if: the engine is not running. there is a brake system malfunction. there is a malfunction in the power supply or the vehi ...