Checking The Battery - Mercedes-Benz M-Class Operator's Manual

SmartKey
76

Checking the battery

Press the & or % button.
X
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.
Changing the battery (
X
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.
Take the mechanical key out of the
X
SmartKey (
Y
Press mechanical key ; into the opening
X
in the SmartKey in the direction of the
page 76)
Y
page 75).
arrow until battery tray cover : opens.
When doing so, do not hold cover : shut.
Remove battery tray cover :.
X
Repeatedly tap the SmartKey against your
X
palm until battery = falls out.
Insert the new battery with the positive
X
terminal facing upwards. Use a lint-free
cloth to do so.
Make sure that the surface of the battery is
X
free from lint, grease and all other forms of
contamination.
Insert the front tabs of battery tray
X
cover : and then press to close it.
Insert the mechanical key into the
X
SmartKey.
Check the function of all SmartKey buttons
X
on the vehicle.
I n f o r ma t i o n P r o v i d e d b y :