See also:

Resetting to factory settings
For safety reasons, the Day Lights function in the Lights submenu is only reset when the vehicle is stationary. •► Press the button on the steering wheel to select the Settings menu. ...

Important safety notes
Service products include the following: - fuels (e.g. gasoline, diesel) - additives for exhaust gas aftertreatment (DEF) - lubricants (e.g. engine oil, transmission oil) - coolant - brake fluid ...

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 ...