Britax safe-n-sound BS0072E-i20133 Instructions For Installation & Use page 66

HOW TO USE THE HEADREST
First remove both harness straps (refer to page
43), then rotate lever down to release headrest
clamp (A). Slide the headrest up or down to
suit the height of your child (from page 65 for
toddler use). In rearward facing mode, move the
headrest so that the bottom slots in the headrest
line up with the top of the child's shoulders. If the
headrest slots do not align to a shell slot, move
the headrest up to the next set of slots. Do not
Headrest Clamp
move headrest downwards. Rotate the lever
upward to lock the headrest clamp (B). Refit both
harness straps, ensuring that there are no twists
and that each strap is in the correct and matching
slots in both the seat shell and headrest (refer to
page 42).
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Instructions for Installation & Use