Mercedes-Benz CL-Class 2013 Owners Manual - Manual (Page 80)

arrow until battery tray cover : opens.
When doing so, do not hold cover : shut.
X Remove battery tray cover :.
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 tray
cover : and then press to close it.
X Insert the mechanical key into the
SmartKey.
X
Check the function of all SmartKey buttons
on the vehicle.
78
SmartKey
Opening/c
losing