Mercedes-Benz CL-Class 2014 Owners Manual - Manual (Page 81)

arrow until battery tray cover : opens. Do
not hold the cover closed while doing so.
X Remove the cover of the battery tray.
X Repeatedly tap the SmartKey against your
palm until battery = falls out.
X
Insert the new battery with the positive
pole facing upwards. Use a lint-free cloth to
do so.
X Make sure that the battery surface is free
of lint, grease, or other dirt.
X Insert the front tabs of the battery tray's
cover first and then press to close it.
X Replace the mechanical key in the
SmartKey.
X
Check the function of all SmartKey buttons
on the vehicle.
SmartKey
79
Opening
and
closing
Z