Trailer power supply
The trailer socket of your vehicle is equipped at the factory with a permanent power supply. The permanent power supply is supplied via trailer socket pin 4.
You can connect accessories with a maximum power consumption of 240 W to the
permanent power supply. You must not charge a trailer battery using the power supply.
The trailer's permanent power supply is switched off in the event of low vehicle supply voltage and after six hours at the latest. You can obtain further information about installing the trailer's electrical equipment from a qualified specialist workshop, e.g. an authorized Mercedes-Benz Center.
See also:
Creating new contacts/changing
contacts
In certain countries, this function stops
being available from a vehicle speed of
more than approximately 3 mph (5 km/h).
As soon as the speed falls below
approximately 2 mph (3 km/h), the
f ...
Notes on technical data
The data stated here specifically refers to
a vehicle with standard equipment. Consult
an authorized Mercedes-Benz Center for
the data for all vehicle variants and trim
levels. ...
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 batter ...