Do not rub the battery with rags or cloths. The
battery could explode if touched due to
electrostatic charge or due to spark
formation.
!
The battery is a Valve-Regulated Lead
Acid (VRLA) battery, also referred to as
“fleece” battery.
Such batteries do not require topping-up of
the electrolyte level. VRLA batteries
therefore do not have cell caps and the
battery cover is non-removable. Do not
attempt to open the battery as otherwise
the battery will be damaged.
VRLA batteries do not require topping-up of
the electrolyte level. They cannot be
opened to check the electrolyte level.
However, the battery condition must be
checked periodically by performing a
battery conductance test. Refer to
Maintenance Booklet for battery condition
testing intervals.
The factory-equipped battery may only be
replaced with a battery that
R
has the same security features
R
is of identical size
R
is of identical voltage
R
is of identical capacity
!
As any other battery, the battery may
discharge if you do not operate the vehicle
for an extended period of time. Have the
battery disconnected at a qualified
workshop or an authorized Mercedes-Benz
Center in such a case. You may also
connect an accessory battery charge unit
expressly approved by Mercedes-Benz for
your vehicle model to maintain the battery
charge. Contact an authorized Mercedes-
Benz Center for further information.
The battery, the battery ventilation hose
and the lateral plug must always be
securely installed when the vehicle is in
operation.
!
Never loosen or detach battery terminal
clamps while the engine is running or the
SmartKey is in the starter switch or
KEYLESS-GO button is in position 1.
Otherwise the alternator and other
electronic components could be severely
damaged.
Have the battery checked regularly at an
authorized Mercedes-Benz Center.
Refer to Maintenance Booklet for
maintenance intervals or contact an
authorized Mercedes-Benz Center for
further information.
i
Make sure the vehicle’s on-board
electronics have status 0 when you turn off
the engine and no longer require any
electrical consumers. The vehicle then
uses very little power and the battery is
spared.
i
If the battery is discharged, you must use
the mechanical key to unlock the vehicle.
i After battery power was interrupted, do
the following:
R
Synchronize the power windows
(Y page 256).
R
Synchronize the exterior rear view
mirrors (Y page 248).
Battery location
The battery is located in the engine
compartment on the passenger side.
X
Open the hood (Y page 322).
:
Negative terminal
;
Positive terminal with positive terminal
cover
Battery
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Practical hints
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