Mercedes-Benz S-Coupe 2015 - Manual (Page 84)

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 82).
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 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 81).
X Press mechanical key ; into the opening
in the SmartKey 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.
X Check the function of all SmartKey buttons
on the vehicle.
82
SmartKey
Op
ening
and
closing