Tesla Y 2019 Owner's Manual page 26

Front and Rear Seats
WARNING: Riding in a moving vehicle with the
seat back reclined can result in serious injuries in a
collision, as you could slide under the lap belt or
be propelled into the seat belt. Ensure your seat
back is reclined no more than 30 degrees when
the vehicle is moving.
Adjusting Second Row Seat Backs
Model Y provides seating for up to three passengers in
the second row. The seat back is split 60/40 so
adjusting the left seat back moves the seat backs for
both the left and center seating positions, whereas
adjusting the right seat back moves only the rightmost
seat back.
Use the adjustment handles on the outside corner of
each second row outboard seat back to adjust the
corresponding seat back. While pulling and holding the
handle, move the seat back to the desired position, and
then release the handle. Ensure the seat back is securely
latched into position by pushing it forward and
rearward.
Folding Second Row Seat Backs
To maximize cargo space, each second row seat back
can be folded fully forward to lay flat. While pulling and
holding the handle, push the corresponding seat back
fully forward.
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NOTE: Before folding seats fully forward, remove any
items from the seats and the rear footwell. To allow the
seat backs to fold completely flat, you may need to
move the front seats forward.
NOTE: Driving with second row seats folded forward
may increase perceivable noise and/or vibration coming
from the rear of the vehicle (trunk, suspension, etc.).
To allow you to carry long items (such as skis) in the rear
of Model Y, the center seat back can also be
independently folded forward. Pull the handle on the
rear of the seat back to unlatch it, then pull it forward.
MODEL Y Owner's Manual