See also:

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 ...

Brake fluid
WARNING   The brake fluid constantly absorbs moisture from the air; this lowers its boiling point. If the boiling point of the brake fluid is too low, vapor pockets may form in the brake ...

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. ...