See also:

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. ...

Activating video DVD mode
Insert a video DVD. The Rear Seat Entertainment System loads the disc. If disc mode was the last mode selected, it will now be active. If it was not, switch on video DVD mode as described in ...

Fuse box in the engine compartment
  Make sure that the windshield wipers are turned off. WARNING Make sure that the windshield wipers are switched off and that the SmartKey is removed from the ignition lock before you ...