Mercedes-Benz C-Coupe 2015 Owners Manual - Manual (Page 79)

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 dis-
charged.
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
X
Change the battery (
Y
page 77).
i You can get a battery at a qualified spe-
cialist workshop.
Replacing the battery
You require a CR 2025 3 V cell battery.
X
Take the mechanical key out of the Smart-
Key (
Y
page 76).
X Press mechanical key ; into the SmartKey
opening in the direction of the arrow until
battery compartment cover : opens. Do
not hold battery compartment cover :
closed while doing so.
X
Remove battery compartment cover :.
X
Repeatedly tap the SmartKey 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 of lint, grease and other contaminants.
X Insert the front tabs of battery compart-
ment cover : into the housing first and
then press to close it.
X Insert mechanical key ; into the Smart-
Key (
Y
page 76).
X
Check the function of all SmartKey buttons
on the vehicle.
SmartKey
77
Op
ening
and
closing
Z