Mercedes-Benz Black Series Operator's Manual page 67

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
Press the & or % button.
X
The SmartKey battery is working properly if
battery check lamp : lights up briefly.
If battery check lamp : does not light up
briefly during the test, the SmartKey battery
is discharged.
Change the battery (
X
i
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
i
You can get a battery at any qualified
specialist workshop.
Replacing the battery
Take the mechanical key out of the
X
SmartKey ( page 64).
Y
You require a CR 2025 3 V cell battery.
page 65).
Y
Press mechanical key ; into the opening
X
in the SmartKey in the direction of the
arrow until battery tray cover : opens. Do
not hold the cover closed while doing so.
Remove the cover of the battery tray.
X
Repeatedly tap the SmartKey against your
X
palm until battery = falls out.
Insert the new battery with the positive
X
terminal facing upwards. Use a lint-free
cloth to do so.
Insert the front tabs of the battery tray's
X
cover first, and then press to close it.
Check the function of all SmartKey buttons
X
on the vehicle.
SmartKey
65
Z