See also:

Important safety notes
WARNING   Air bags are designed to reduce the incidence of injuries and fatalities in certain situations: • frontal impacts (driver's and frontpassenger front air bags and driver's kne ...

Purity
Assuring the purity of DEF is particularly important with respect to avoiding malfunctions in the exhaust gas aftertreatment system. If DEF is pumped out of the DEF tank, e.g. during repair wo ...

Brake fluid
WARNING Over a period of time, the brake fluid 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 ...