Headlamps fogged up on the inside
The headlamps may fog up on the inside if there is high atmospheric humidity.
•► Drive with the headlamps switched on.
The level of moisture diminishes, depending on the length of the journey and the weather conditions (humidity and temperature).
If the level of moisture does not diminish:
•► Have the headlamps checked at a qualified specialist workshop.
See also:
Speedometer with segments
The segments in the speedometer indicate
which speed range is available.
Cruise control activated:
The segments light up from the stored speed to the maximum speed.
DISTRONIC PLUS activated:
One ...
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 o ...
DEF
Important safety notes
For BlueTEC vehicles only.
DEF is a non-flammable, non-toxic, colorless,
odorless and water-soluble fluid.
Rinse surfaces that have come into
contact with DEF immediately ...