Keep batteries out of the reach of children. If
a battery is swallowed, seek medical attention
immediately.
The SmartKey batteries contain perchlorate
material, which may require special handling
and regard for the environment. National
guidelines must be observed during disposal.
In California, see www.dtsc.ca.gov/
HazardousWaste/Perchlorate/
index.cfm.
Mercedes-Benz recommends that you have
the batteries 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.
If battery check lamp
:
does not light up
during the test, the battery is discharged.
X
Change the battery (
Y
page 68).
i
You can get a battery in any qualified
specialist workshop.
i
Have the batteries replaced at a qualified
specialist workshop.
i
If the SmartKey battery is checked within
the signal reception range of the vehicle,
pressing the
&
or
%
button:
R
locks or
R
unlocks the vehicle
Replacing the battery
You require a CR 2025 3 V cell battery.
X
Take the mechanical key out of the
SmartKey (
Y
page 67).
X
Press mechanical key
;
into the opening
in the SmartKey in the direction of the
arrow until battery tray cover
:
opens. Do
not hold the cover closed while doing so.
X
Remove battery tray cover
:
.
X
Repeatedly tap the SmartKey against your
palm until battery
=
falls out.
X
Insert the new battery with the positive
terminal facing upwards. Use a lint-free
cloth to do so.
X
Make sure that the surface of the battery is
free from lint, grease and all other forms of
contamination.
68
SmartKey
Opening
and
closing
