Mercedes-Benz E-Class Coupe Operator's Manual page 78

SmartKey
76
Battery compartment cover
:
Mechanical key
;
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 :.
Battery
=
X
Repeatedly tap the SmartKey against your
palm until battery = falls out.
X
Insert the new battery with the positive
terminal facing upwards. Use a lint-free
cloth to do so.
X
Make sure that the surface of the battery is
free from lint, grease and all other forms of
contamination.
X
Insert the front tabs of battery
compartment cover : into the housing
first and then press to close it.
X
Insert mechanical key ; into the
SmartKey ( Y page 74).
X
Check the function of all SmartKey buttons
on the vehicle.