Mercedes-Benz CLA Owner's Manual page 487

484 Breakdown assistance
Opening
Lift carpet 1 in the direction of the arrow.
#
Loosen screws 2, remove fuse box lid from
#
the top.
Opening and closing the fuse box in the boot
Observe the notes on electrical fuses
( page 482).
/
Open the boot floor ( page 115).
/
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Fuse box 1 is located in the centre underneath
the boot floor.