Mercedes-Benz 2009 GL320 BlueTEC Operator's Manual page 106

Controls in detail
Seats
under the seat belt in a collision. If you slide
under it, the belt would apply force at the
abdomen or neck. That could cause serious
or fatal injuries. The seat backrest and seat
belts provide the best restraint when the
wearer is in a nearly upright position and
seat belts are properly positioned on the
body.
Your seat must be adjusted so that you can
correctly fasten your seat belt.
Never place hands under the seat or near
any moving parts while a seat is being
adjusted.
After adjusting rear seats, make sure
the seats are properly locked
R
the seat backrests are in an upright
R
position and are properly locked
Check for secure locking by pushing and
pulling on the seat backrests. If a seat and
seat backrest are not properly locked, the
seat could move forward and the seat
backrest could fold. The child seat would
no longer be properly supported or
positioned to provide its intended benefit.
104
Seat backrest tilt (second-row seats)
G Warning!
The seat belt only offers its intended
protection when the seat backrest is in a
nearly vertical position and the occupant is
sitting upright. Avoid sitting in positions
that prevent the seat belt from being
properly positioned against the body. You
should therefore adjust the seat backrest
to a position as upright as possible.
The seat backrest tilt can be set to five
different positions.
Adjustment handle
1
X
While seated, pull handle
1
arrow to resistance point and hold it there.
X
To move seat backrest back, lean lightly
against the seat backrest.
X
To move seat backrest forward, lean
forward with handle pulled and held at
1
resistance point.
The seat backrest will move forward
against your back.
X
Release handle when the seat backrest
1
has reached the desired position.
To make sure the seat backrest has
engaged, lean firmly against the seat
backrest.
Head restraint height
G Warning!
With a rear seat occupied, make sure to
move the respective head restraint up from
the lowest non-use position and have the
occupant adjust the head restraint
properly.
For your protection, drive only with properly
positioned head restraints.
Adjust the head restraint so that it is as
close to the head as possible and the center
in direction of