Battery of the key
Important safety notes
G
WARNING
Batteries contain toxic and corrosive substan-
ces. If batteries are swallowed, it can result in
severe health problems. There is a risk of fatal
injury.
Keep batteries out of the reach of children. If
a battery is swallowed, seek medical attention
immediately.
H
Environmental note
Batteries contain pollutants.
It is illegal to dispose of them
with the household rubbish.
They must be collected sep-
arately and disposed of in an
environmentally responsible
recycling system.
Dispose of batteries in an
environmentally responsible
manner. Take discharged
batteries to a qualified spe-
cialist workshop or to a col-
lection point for used batter-
ies.
Mercedes-Benz recommends that you have the
batteries replaced at a qualified specialist work-
shop.
Checking the battery
X
Press the
&
or
%
button.
The battery is OK if battery check lamp
:
lights up briefly.
The battery is discharged if battery check
lamp
:
does not light up briefly.
X
Replace the battery (
Y
page 77).
If the battery of the key is checked within the
signal reception range of the vehicle, pressing
the
&
or
%
button:
R
locks or
R
unlocks the vehicle
i
You can obtain a battery from any qualified
specialist workshop.
Replacing the battery
You require a CR 2025 3 V cell battery.
X
Take the emergency key element out of the
key (
Y
page 76).
X
Press emergency key element
;
into the
opening in the key in the direction of the arrow
until battery compartment cover
:
opens.
When doing so, do not hold battery compart-
ment cover
:
shut.
X
Remove battery compartment cover
:
.
Key
77
Ope
ni
ng
and
cl
os
in
g
Z
