Important Safety Notes - Mercedes-Benz B-Class Operator's Manual

SmartKey battery

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.
The SmartKey batteries contain perchlorate
material, which may require special handling
and regard for the environment. National guide-
lines must be observed during disposal. In Cal-
ifornia, see www.dtsc.ca.gov/
HazardousWaste/Perchlorate/index.cfm.
Mercedes-Benz recommends that you have the
battery replaced at a qualified specialist work-
shop.
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 ( page 67).
X Y
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 spe-
cialist workshop.
Replacing the battery
You require a CR 2025 3 V cell battery.
Take the mechanical key out of the SmartKey
X
( page 66).
Y
Press mechanical key ; into the opening in
X
the SmartKey in the direction of the arrow
until battery tray cover : opens. When doing
so, do not hold cover : shut.
Remove battery tray cover :.
X
Repeatedly tap the SmartKey against your
X
palm until battery = falls out.
Insert the new battery with the positive ter-
X
minal facing upwards. Use a lint-free cloth to
do so.
Make sure that the surface of the battery is
X
free of lint, grease and other contaminants.
Insert the front tabs of battery tray cover :
X
and then press to close it.
Insert mechanical key into the SmartKey
X
( page 66).
Y
Check the function of all SmartKey buttons on
X
the vehicle.
SmartKey
67
Z