High outside temperatures
If DEF heats up to over 122 °F (50 °C) for extended periods, e.g. as a result of direct sunlight on the DEF reservoir, DEF can decompose. Ammonia vapors develop as a result.
WARNING
When opening the filler cap of the DEF tank
ammonia gas vapors may escape. Refill DEF
in a well ventilated area only. Ammonia gas
vapors have a pungent odor and are
particularly irritating for your skin, mucous
membranes, and eyes. Inhaling ammonia gas
vapors will cause burning eyes, nose, and
throat, as well as coughing and watering eyes.
See also:
Setting the side air vents
Setting the side air vents
To open/close: turn
thumbwheel 3 to the
left or right.
Side window defroster vent 1 is
never
completely shut, even if side air vent 2 is
shut. ...
Cleaning the paintwork
Scratches, corrosive deposits, areas affected
by corrosion and damage caused by
inadequate care cannot always be completely
repaired. In such cases, visit a qualified
specialist workshop, e.g. ...
How the occupant classification
system works
The Occupant Classification System (OCS)
categorizes the occupant on the frontpassenger
seat by means of a weight sensor.
The front-passenger front air bag is
deactivated automatically for cert ...