Mercedes-Benz 2012 B Class - Manual (Page 72)

SmartKey battery
Important safety notes
G
WARNING
Batteries contain toxic and corrosive
substances. 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
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.
The battery is discharged if battery check
lamp : does not light up briefly.
X Change the battery ( Y page 70).
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
i You can get a battery at any qualified
specialist workshop.
Replacing the battery
You require a CR 2025 3 V cell battery.
X Take the mechanical key out of the
SmartKey (
Y page 69).
X Press mechanical key ; into the opening
in the SmartKey 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 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.
70
SmartKey
Opening and closing