See also:

Windows fogged up on the outside
Switch on the windshield wipers. Press the button repeatedly until the or symbol appears in the display. You should only select this setting until the windshield is clear again. ...

Important safety notes
WARNING When leaving the vehicle, always remove the SmartKey from the ignition lock. Always take the SmartKey with you and lock the vehicle. Do not leave children unsupervised in the vehicle ...

Additives
Only use DEF in accordance with ISO 22241. Do not use additives with DEF and do not dilute DEF with water. This may destroy the BlueTEC exhaust gas aftertreatment system. ...