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 battery replaced at a qualified specialist
workshop.
Checking the battery
X
Press the
&
or
%
button.
The battery is working properly 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 86).
i
If the key battery is checked within the
signal reception range of the vehicle, press-
ing the
&
or
%
button:
R
locks or
R
unlocks the vehicle
i
You can obtain a battery from any quali-
fied 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 85).
X
Press emergency key element
;
into the
opening in the key in the direction of the
arrow until battery tray cover
:
opens.
When doing so, do not hold cover
:
shut.
X
Remove battery tray cover
:
.
X
Repeatedly tap the key against your palm
until battery
=
falls out.
X
Insert the new battery with the positive ter-
minal facing upwards. Use a lint-free cloth
to do so.
X
Make sure that the surface of the battery is
free of lint, grease and other contamina-
tion.
X
Insert the front tabs of battery tray cover
:
and then press to close it.
X
Insert emergency key element into the key
(
Y
page 85).
X
Check the function of all key buttons on the
vehicle.
86
Key
Openin
g
and
closing
