Peg-Perego PRIMO VIAGGIO 4-35 Owner's Manual page 27

How to install the Base using the LATCH SYSTEM
Keep the lockoff clip open and
make sure that the latch strap
is threaded flat through the
base (f ).
Tighten the base against the
seat by pulling the free end of the latch
strap; at the same time press down on
the base with your body weight and
tighten further (g). Push and pull on
the base. If you can move it more than
2,5 cm (1 inch), tighten the belt further.
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