Mercedes-Benz E-Class Sedan 2012 Operator's Manual page 80

SmartKey
78
If you unlock the vehicle using the mechanical
key, the fuel filler flap will not be unlocked
automatically.
X
To unlock the fuel filler flap: insert the
SmartKey in the ignition lock.
Removing the mechanical key
X
Push release catch : in the direction of
the arrow and at the same time, remove
mechanical key ; from the SmartKey.
SmartKey battery
Important safety notes
Have the batteries changed at a qualified
specialist workshop.
G
WARNING
Batteries contain toxic substances.
Swallowing batteries can lead to serious
health issues or death.
Keep batteries out of the reach of children.
Seek medical attention immediately if a
battery is swallowed.
G
WARNING
The SmartKey batteries contain perchlorate
material, which may require special handling
and regard for the environment. Observe
government disposal guidelines. California
residents, see www.dtsc.ca.gov/
HazardousWaste/Perchlorate/
index.cfm.
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
briefly during the test, the battery is
discharged.
X
Changing the battery (
i You can obtain the battery at a qualified
specialist workshop.
i
If the SmartKey battery is checked within
the signal reception range of the vehicle,
pressing the & or % button locks or
unlocks the vehicle.
Changing the battery
You require a CR 2025 3 V cell battery.
X
Take the mechanical key out of the
SmartKey ( Y page 77).
X
Press mechanical key ; into the opening
in the SmartKey in the direction of the
Y page 78)