Mercedes-Benz V-Class 2021 Owner's Manual page 252

Disconnecting and removing the starter bat‐
tery
& WARNING Risk of explosion from hydro‐
gen gas igniting
There is a danger of hydrogen gas igniting
when charging the battery if there is a short
circuit or sparks start to form.
Make sure that the positive terminal of
#
the connected battery does not come
into contact with vehicle parts.
Never place metal objects or tools on a
#
battery.
The described order of the battery
#
clamps must be observed when con‐
necting and disconnecting the battery.
When giving starting assistance, always
#
make sure that you only connect battery
terminals with identical polarity.
During starting assistance, you must
#
observe the described order for con‐
necting and disconnecting the jump
lead.
Do not connect or disconnect the bat‐
#
tery clamps while the engine is running.
& WARNING Danger of chemical burns
from the battery acid
Battery acid is caustic.
Avoid contact with the skin, eyes or
#
clothing.
Do not lean over the battery.
#
Do not inhale battery gases.
#
Keep children away from the battery.
#
Immediately rinse battery acid off thor‐
#
oughly with plenty of clean water and
seek medical attention immediately.
* NOTE Damage to electronic components
due to work carried out incorrectly on the
battery
If the starter battery is disconnected before
the key is removed from the ignition lock,
electronic components or assemblies, such
as the alternator, can be damaged.
Switch off the engine and remove the
#
key from the ignition lock.
Breakdown assistance 249
Check to see that there are no indicator
#
lamps lit in the instrument cluster.
Always remove the negative terminal
#
clamp first and then the positive termi‐
nal clamp.
Do not interchange the battery clamps.
#
Always have work on the battery carried out at a
qualified specialist workshop.
If, in exceptional circumstances, you must dis‐
connect the battery yourself, pay attention to the
following:
Observe the notes on the 12 V battery
R
( page 244).
/
Secure the vehicle to prevent it from rolling
R
away.
After the battery has been disconnected, the
R
parking brake is automatically applied. You
can then no longer move the vehicle.
For vehicles with an automatic transmission,
R
the transmission is locked in position j after
disconnecting the battery. You can then no
longer move the vehicle.
The battery and the cover of the positive ter‐
R
minal clamp must be fitted securely during
operation.
Seat base (example: right-hand front seat)
The following description on connecting and fit‐
ting the battery uses the example of the starter
battery in the seat base of the right-hand front
seat.
Switch off all electrical consumers.
#
Switch off the engine and remove the key
#
from the ignition lock.
Open the front right-hand door.
#
Press both catch springs
#
remove cover 2 upwards from the seat
base.
1 down and