Mercedes-Benz E-Class Estate 2021, Owner'S Manual

Page: 365 / 533

begin with POSITIVE contact 2 on your own
vehicle rst.
#
Dur During st ing star arting assist ting assistance: ance: start the engine of
the donor vehicle and run at idle speed.
#
Connect the negative terminal of the donor
battery and earth point 3 of your own vehicle
by using the jump lead/charging cable. Begin
with the donor battery rst.
#
Dur During st ing star arting assist ting assistance: ance: start the engine of
your own vehicle.
#
Dur During t ing the c he char harging pr ging process: ocess: start the charg-
ing process.
#
Dur During st ing star arting assist ting assistance: ance: let the engines run
for several minutes.
#
Dur During st ing star arting assist ting assistance: ance: before disconnect-
ing the jump lead, switch on an electrical con-
sumer on your own vehicle, e.g. the rear win-
dow heater or lighting.
When the starting assistance/charging process is
complete, perform the following steps:
#
First, remove the jump lead/charging cable
from earth point 3 and the negative terminal
of the donor battery, then POSITIVE contact
2 and the positive terminal of the donor bat-
tery. Begin each time with the contacts on
your own vehicle rst.
#
A er removing the jump lead/charging cable,
close cover 1 of POSITIVE contact 2 .
Plug-in h Plug-in hybr ybrid: id: if your vehicle has been started
with starting assistance, it may not be possible to
use the electric drive for approximately 30
minutes.
Further information can be obtained at a quali ed
specialist workshop.
RReplacing t eplacing the 12 V batt he 12 V battery ery
#
Observe the notes on the 12 V battery
(
/
page 357).
Mercedes-Benz recommends that you have the
12 V battery replaced at a quali ed specialist
workshop, e.g. at a Mercedes-Benz Service
Centre.
Observe the following notes if you want to replace
the battery yourself:
R
Always replace a faulty battery with a battery
which meets the speci c vehicle require-
ments.
The vehicle is equipped with an AGM technol-
ogy battery (Absorbent Glass Mat) or a lith-
ium-ion battery. Full vehicle functionality is
only guaranteed with an AGM battery or lith-
ium-ion battery. For safety reasons, Mercedes-
Benz recommends that you only use batteries
which have been tested and approved for your
vehicle by Mercedes-Benz.
R
Carry over detachable parts, such as vent
hoses, elbow ttings or terminal covers from
the battery being replaced.
R
Make sure that the vent hose is always con-
nected to the original opening on the side of
the battery.
Fit any existing or supplied cell caps.
Otherwise, gases or battery acid could
escape.
R
Make sure that detachable parts are recon-
nected in the same way.
362 362 Breakdown assistance