Pick how you're putting it in. Each way is from the maker's manual.
Base with LATCH
Where it can go: Rear-facing only, on forward-facing vehicle seats in a location the vehicle maker allows; never in vehicle seats that face the rear or side. Never on a front seat with an active airbag.
1Turn the base over and pull the LATCH straps out of their storage slots.
2With the car on level ground, place the base in an approved seating position and adjust the recline foot to the zone for your child's weight (blue for 4-20 lb, green for 20-35 lb).
3Hold the base with one hand, press the button on the belt tensioner handle (without using your thumb) and pull it open.
4Extend the LATCH straps fully, flat and untwisted, and push the connectors onto the lower anchor bars on both sides until they click; pull on them to check.
5Pull the LATCH adjustment strap while pushing the base into the seat to remove slack, without overtightening, then lay the free end across the belt path.
6Press down on the sides of the SafeLock belt tensioner until it clicks and the belt lock indicator turns green.
7Click the car seat into the base and lift the handle to check.
Check it before you drive
The base should not move more than 1 inch (2.5 cm) at the belt path; if it does, open the tensioner, remove a little more slack, close and recheck, or try another seat or method.
If the tensioner will not lock, loosen the LATCH strap slightly and try again.
Recheck that the recline indicator is still in the right zone for your child's weight; if not, remove the base, adjust and reinstall.
Retold from Cybex manual (PDF). Your vehicle's manual also says which seats have LATCH anchors. When in doubt, a certified child passenger safety technician can check your install.
The carrier on and off the base
Clicking it onto the base
1Make sure the handle is locked in the carry position.
2Pick the seat up by the handle and lower it onto the base until you hear a click.
3Lift up on the carrier to check it is locked to the base.
4Check the recline indicator shows the right zone for your baby's weight.
The maker warns: Only lift by the handle when it is locked in the carry position; any other position could let the baby fall.
Rear-facing only, on forward-facing vehicle seats in a location the vehicle maker allows; never in vehicle seats that face the rear or side. Never on a front seat with an active airbag.
How do I know the Cybex Aton G is installed right?+
The base should not move more than 1 inch (2.5 cm) at the belt path; if it does, open the tensioner, remove a little more slack, close and recheck, or try another seat or method. If the tensioner will not lock, loosen the LATCH strap slightly and try again. Recheck that the recline indicator is still in the right zone for your child's weight; if not, remove the base, adjust and reinstall.
When do I use or remove the Cybex Aton G infant insert?+
The infant insert comes already fitted and gives smaller babies a better harness fit and more support for the body. Cybex suggests using it until about 3 months or about 11 lb.
