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Mercedes-Benz recommends that you have
the batteries replaced at a qualified specialist
workshop.
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/Hazard-
ousWaste/Perchlorate/index.cfm.
Checking the battery
Press the & or % button.
X
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.
Change the battery (
X
Y
If the SmartKey battery is checked within the
signal reception range of the vehicle, pressing
the & or % button:
locks or
R
unlocks the vehicle
R
You can get a battery at any qualified spe-
i
cialist workshop.
Replacing the battery
You require a CR 2025 3 V cell battery.
Take the mechanical key out of the Smart-
X
Key (
page 82).
Y
X
X
page 83).
X
X
X
X
X
X
Press mechanical key ; into the SmartKey
opening in the direction of the arrow until
battery compartment cover : opens. Do
not hold battery compartment cover :
closed while doing so.
Remove battery compartment cover :.
Repeatedly tap the SmartKey against your
palm until battery = falls out.
Insert the new battery with the positive ter-
minal facing upwards. Use a lint-free cloth
to do so.
Make sure that the surface of the battery is
free of lint, grease and other contaminants.
Insert the front tabs of battery compart-
ment cover : into the housing and then
press to close it.
Insert mechanical key ; into the Smart-
Key (
page 82).
Y
Check the function of all SmartKey buttons
on the vehicle.
SmartKey
83
Z
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