Mercedes-Benz B-Class 2011, Owner'S Manual

Page: 77 / 329

cialist workshop or to a col-
lection point for used batter-
ies.
Have the batteries changed at a qualified spe-
cialist 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 74).
i
If the key battery is checked within the
signal reception range of the vehicle, press-
ing the & or % button:
R
locks or
R
unlocks the vehicle
i
You can get a battery in any qualified spe-
cialist workshop.
Replacing the battery
You require a CR 2025 3 V cell battery.
X
Take the emergency key element out of the
key (
Y
page 73).
X
Press emergency key element ; into the
opening in the key 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 key against your palm
until battery = falls out.
X
Insert the new battery with the positive ter-
minal facing upwards. Use a lint-free cloth
to do so.
X
Make sure that the surface of the battery is
free from lint, grease and all other forms of
contamination.
X
Insert the front tabs of battery tray
cover : and then press to close it.
X
Insert the emergency key element into the
key.
X
Check the function of all key buttons on the
vehicle.
74
Key
Opening
and
closing