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:
Problems with the rear window
defroster
The rear window defroster has deactivated
itself prematurely or cannot be activated.
•► Switch off any consumers that are not
required, e.g. reading lamps or interior
lighting.
When the ...
Low outside temperatures
DEF freezes at a temperature of
approximately 12 °F (–11 °C). The vehicle is
equipped with a DEF preheating system when
it leaves the factory. Winter operation is
therefore also guaranteed at ...
Service messages
Information on the type of service and service
intervals (see separate Service Booklet).
You can obtain further information from an
authorized Mercedes-Benz Center or at
http://www.mbusa.com (U ...