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BRITAX Child Safety, Inc.
MARATHON User Guide
Lap-Shoulder Belt Installation
8. Push down into the middle
of the child seating area
with moderate force while
pulling the top (shoulder)
part of the belt between
the belt slots to remove
any remaining slack
through the lock-off.
9. Attach the Versa-Tether to
a designated anchor (see
vehicle owner’s manual)
and remove all slack (see
page 28). Store the excess
webbing in the elastic
strap.
10. Replace the seat cover.
1. Remove the Versa-Tether
from the pouch and place
it up and over the child
seat back.
2. Adjust this child seat to
position 1 or 2 and place
forward-facing on the
vehicle seat (see page 25).
Ensure that no more than
20% or 3 in. (7.6 cm) of the
base hangs over the edge
of the vehicle seat.
IMPORTANT:
Your child
seat may not perform as
intended if the base of the
child seat is not flat on the
vehicle seat.
3. Loosen the harness.
a. Lift harness adjuster
lever and pull both
harness straps
forward.
b. Remove the infant
positioning pillow
and unbuckle the
harness.
4. Pull the head pad up, then
pull the seat cover forward
to access the forward-
facing belt path.
5. Open the green lock-off
closest to where the vehicle
belt will be buckled.
a. Open the locking tab.
b. Open the clamp.
6. Route the vehicle belt
through the forward-facing
belt slots, ensuring the
vehicle belt is not twisted,
then buckle.
7. Push down into the rear
of the child seating area
with moderate force while
removing all slack from
the bottom (lap) part of the
vehicle belt and close the
lock-off.
IMPORTANT:
Both the
vehicle lap and shoulder
belts must be routed
through the lock-off.
Forward-Facing Installation with Lap-Shoulder Belt
5b
5a
Locking
Tab
Clamp
9
Check that all connections are secure and straps are not
twisted.
9
Check that no more than 20% or 3 in. (7.6 cm) of the
base hangs over the edge of the vehicle seat.
9
Check that the child seat cannot be moved front to back
or side to side more than 1 in. (2.5 cm) at the belt path.
If the child seat is not secure, repeat installation or use a
different seating location.
9
Check that any excess Versa-Tether webbing is contained
within your vehicle and secured in the elastic strap.
3"