Mercedes-Benz M-Class Owner's Manual page 78

ing the & or % button locks or
unlocks the vehicle.
Changing the battery
You require a CR 2025 3 V cell battery.
Take the emergency key element out of the
X
key ( page 74).
Y
Press emergency key element ; into the
X
opening in the key in the direction of the
arrow until battery tray cover : opens.
When doing so, do not hold cover : shut.
Remove battery tray cover :.
X
Repeatedly tap the key against your palm
X
until battery = falls out.
Insert the new battery with the positive ter-
X
minal 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 emergency key element into the
X
key.
Check the function of all key buttons on the
X
vehicle.
Key
75
Z