Operation Manual

Mercedes-Benz recommends that you have the
batteries replaced at a qualified specialist work-
shop.
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 79).
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 SmartKey
(
Y page 78).
X
Press mechanical key ; into the SmartKey
opening in the direction of the arrow until bat-
tery 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 compartment
cover : into the housing and then press to
close it.
X
Insert mechanical key ; into the SmartKey
(
Y page 78).
X
Check the function of all SmartKey buttons on
the vehicle.
SmartKey
79
Opening and closing
Z