Mercedes-Benz S-CLASS 2017 Operator's Manual page 301

Problems with the 115 V power socket
Problem
The warning lamp on the
115 V power socket is
not lit.
Coolbox in the rear compartment
Important safety notes
G
WARNING
If you cover the ventilation grille for the cool-
box, it may overheat. There is a risk of fire.
Always make sure that the ventilation grille is
not covered.
The ventilation grille for the coolbox is in the
trunk.
The coolbox can bear a maximum load of 7.7 lb
(3.5 kg).
If you want to store a bottle in the upper com-
partment of the coolbox, the capacity of the
bottle must not exceed 17 fl. oz. (0.5 l).
Store only plastic bottles in the upper compart-
ment of the coolbox.
Possible causes/consequences and M Solutions
The on-board voltage is too low because the battery is too weak.
Start the engine.
X
or
Charge the battery (
X
If the indicator lamp still does not light up:
Visit a qualified specialist workshop.
X
The temperature of the DC/AC converter is temporarily too high.
Remove the electronic device connector from the 115 V socket.
X
Let the DC/AC converter cool down.
X
If the indicator lamp still does not light up after cooling down the
converter:
Visit a qualified specialist workshop.
X
You have connected an electronic device that has a constant nominal
power of less than 150 watts, but has a very high switch-on current.
This device will not work. If you connect such a device, the 115 V
power socket will not supply it with power.
Connect a suitable electronic device.
X
page 334).
Y
Using the coolbox
Vehicles with rear seat armrest: fold down
X
the rear seat armrest.
Pull handle : and fold down cover ;.
X
Features
299
Z