Operation Manual

The jump-starting connection point is in the
engine compartment (Y page 290).
X
Open the hood.
X
Connect the battery charger to the positive
terminal and ground point in the same
order as when connecting the donor bat-
tery in the jump-starting procedure
(Y page 290).
If the indicator/warning lamps do not light up
at low temperatures, it is very likely that the
discharged battery has frozen. In this case
you may neither jump-start the vehicle nor
charge the battery. The service life of a
thawed-out battery may be shorter. The start-
ing characteristics can be impaired, particu-
larly at low temperatures. Have the thawed-
out battery checked at a qualified specialist
workshop.
Only charge the installed battery with a bat-
tery charger which has been tested and
approved by Mercedes-Benz. A battery
charger unit specially adapted for Mercedes-
Benz vehicles and tested and approved by
Mercedes-Benz is available as an accessory.
It permits the charging of the battery in its
installed position. Contact an authorized
Mercedes-Benz Center for further informa-
tion and availability. Read the battery charg-
er's operating instructions before charging
the battery.
High-voltage battery – important
safety notes
G
DANGER
The vehicle's high voltage electrical system is
under high voltage. If you modify components
in the vehicle's high-voltage electrical system
or touch damaged components, you may be
electrocuted. The components in the vehi-
cle's high-voltage electrical system may be
damaged in an accident, although the damage
is not visible. There is a risk of fatal injury.
Following an accident, do not touch any high-
voltage components and never modify the
vehicle's high-voltage electrical system. Have
the vehicle towed away after an accident and
the vehicle's high-voltage electrical system
checked by a qualified specialist workshop.
G
WARNING
In the event of a vehicle fire, the internal pres-
sure of the high-voltage battery can exceed a
critical value. In this case flammable gas
escapes through a ventilation valve on the
underbody. The gas can ignite. There is a risk
of injury.
Leave the danger zone immediately. Secure
the danger area at a suitable distance, whilst
observing legal requirements.
The vehicle's high voltage electrical system is
under high voltage.
R
Do not handle high-voltage components or
the orange cables of the vehicle's high-volt-
age electrical system.
R
Do not touch high-voltage components or
the orange cables of the high-voltage elec-
trical system when a vehicle has been
involved in a crash.
R
Do not touch any damaged components or
the damaged orange cables of the vehicle's
high-voltage electrical system.
R
Do not remove the covers of the high-volt-
age electrical system components that are
marked with a warning sticker.
Do not leave the vehicle parked for longer
than 14 days with a high-voltage battery con-
dition of charge below 20%.
You can check the condition of charge in the
charge level display (Y page 184).
If you park the vehicle and leave it stationary
for longer periods, connect it to a power sup-
ply.
If you leave the vehicle parked for longer than
four weeks, the battery may be damaged by
exhaustive discharging.
288
Batteries
Roadside Assistance