Britax Safe-nSound Instructions For Installation And Use Manual page 34

HOW TO SETUP
HOW TO ADJUST THE HEADREST & HASSLE FREE HARNESS™
A. Loosen the harness straps before adjusting the headrest.
B. To make adjustments you will need to remove the child and the restraint from the vehicle or loosen
the seatbelt.
C. To adjust the headrest, pull on the latch on the back of the restraint and pull up or down to position
the bottom of the headrest to be just above the child's shoulders. Release the latch to lock the
headrest in position. Pull headrest upwards to check it is locked in position.
(Harness straps not shown for image clarity)
IMPORTANT :
Ensure harness and headrest are positioned so that the shoulder straps are just above
the child's shoulders but no lower.
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Latch
Pull