Mercedes-Benz 2009 SLR McLaren Roadster Operator's Manual page 80

Safety and Security
Occupant safety
Move the passenger seat as far as
possible rearward.
Once the top tether anchorage hook is
attached, the child restraint itself can be
secured.
Properly secure the child restraint us-
ing the passenger seat lap/shoulder
belt ( page 76) and tether anchorage
for top tether strap, fully in accordance
with the child restraint manufacturer's
instructions.
Tighten the top tether strap according
to the child restraint manufacturer's
instructions.
Reinstall cover 1 after removing the
tether strap.
80