Jump-Starting; Replacing The 12 V Battery - Mercedes-Benz GLA 250 2019 Operator's Manual

particularly at low temperatures. Have the
thawed-out battery checked at a qualified spe-
cialist workshop.
Only charge the installed battery with a battery
charger which has been tested and approved
by Mercedes-Benz. A battery charger unit spe-
cially adapted for Mercedes-Benz vehicles and
tested and approved by Mercedes-Benz is
available as an accessory. It permits the charg-
ing of the battery in its installed position. Con-
tact an authorized Mercedes-Benz Center for
further information and availability. Read the
battery charger's operating instructions before
charging the battery.

Replacing the 12 V battery

Observe the notes on the 12 V battery
( page 292).
Y
Mercedes-Benz recommends that you have
the 12-V battery replaced at a qualified spe-
cialist workshop, e.g. an authorized Mercedes-
Benz Center.
If you want to replace the battery yourself,
observe the following notes:
Always replace a defective battery with a
R
battery which meets the specific require-
ments of the vehicle.

Jump-starting

For the jump-starting procedure, use only the jump-starting connection point, consisting of a
positive terminal and a ground point, in the engine compartment.
G
WARNING
Battery acid is caustic. There is a risk of injury.
Avoid contact with skin, eyes or clothing. Do not inhale any battery gases. Do not lean over the
battery. Keep children away from batteries. Wash away battery acid immediately with plenty of
clean water and seek medical attention.
G
WARNING
During charging and jump-starting, explosive gases can escape from the battery. There is a
risk of an explosion.
Particularly avoid fire, open flames, creating sparks and smoking. Ensure there is sufficient
ventilation while charging and jump-starting. Do not lean over a battery.
The vehicle is equipped with a battery using
AGM (absorbent glass mat) technology or a
battery using EFB (enhanced flooded bat-
tery) technology. Full vehicle functionality is
guaranteed only with an AGM or EFB bat-
tery. If replacement is necessary, always
use the battery technology originally instal-
led. Switching between the battery technol-
ogies is not permitted. For safety reasons,
Mercedes-Benz recommends that you only
use batteries which have been tested and
approved for your vehicle by Mercedes-
Benz.
Use detachable parts such as breather
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hoses, angled connecting pieces or terminal
covers from the battery which is to be
replaced.
Make sure that the vent hose is always con-
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nected to the original opening on the bat-
tery side.
Install existing or supplied cell caps; other-
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wise gases or battery acid could escape.
Make sure that the detachable parts are
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connected again in the same way.
Jump-starting
Z
295