Child Seat Functions; Adjusting The Harness Height; Adjusting The Harness Buckle Position; Using The Harness Buckle - Britax Marathon User Manual

BRITAX Child Safety, Inc.

Child Seat Functions

Adjusting the Harness Height

• In rear-facing mode, the harness straps should be
in the closest position at or below your child's
shoulders. See page 7.
• In forward-facing mode, the harness straps should
be in the closest position at or above your child's
shoulders. See page 7.
1. Loosen the harness.
a. Lift harness adjuster
lever.
b. Pull both harness
straps forward.
2. Squeeze the harness
height adjuster, slide the
harness into the desired
position and release.
3. Ensure the harness has
locked into position.
In some cases, the vehicle head
restraint can prevent the child seat
head pad from being raised high
enough to properly adjust the
harness for the fit of your child when
using a forward facing reclined
position. DO NOT force the child
seat head pad past the vehicle head
restraint. Doing so could cause the child seat not to
perform as intended. If the location of the vehicle head
restraint interferes with the child seat head pad, raise
or remove the vehicle head restraint. If the vehicle head
restraint cannot be removed, move the child seat to the
upright position or try a different seating location.
22
1b
1a

Adjusting the Harness Buckle Position

• For rear-facing installation:
– ALWAYS position the buckle in
the inner slot for when using a
vehicle seat belt installation.
– The vehicle belt must pass in
front of the buckle strap.
– Position the buckle in the
slot closest to but not under the child when using the
LATCH installation.
• For forward-facing installation, use the outer buckle slot
when installing the child seat with a child weighing
30 lbs (13.6 kg) and above or if the buckle is under the
child in the inner position.
• NEVER leave the buckle in the adjustment slot.
1. Unbuckle the harness
and remove the buckle.
See page 37.
2. Route the belly pad
and buckle through the
desired slot in the cover.
NOTE: Slide the end of
the belly pad over the
comfort foam.
3. Slide the buckle retainer
into the front buckle
slot and slide into the
corresponding buckle
position. Ensure the red
release button faces out.
Replace cover.

Using the Harness Buckle

To Fasten:
1. Insert one tongue at a
time into the buckle.
Proper connection is
confirmed with a click
after inserting each
buckle tongue.
To Release:
1. Press the release button
and pull the tongues from
the buckle.
NOTE: Periodically clean
the buckle to ensure
proper operation. See
page 38.
MARATHON User Guide
ADJUSTMENT
SLOT
23