See also:

Capacities
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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. ...

Text reader settings
Setting the text reader speed Select Vehicle by turning the COMAND controller and press to confirm. Select System and press to confirm. Select Text Reader and press to confirm. ...