Mercedes-Benz GLS Owner's Manual page 70

After removing the child restraint system,
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reattach covers 1 or 2.
Vehicles with a rear bench seat:
Mercedes-Maybach vehicles with reclin‐
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ing rear seats: before an ISOFIX or i-Size
child restraint system is installed, tilt the
backrest of the reclining rear seat back
slightly.
Remove upholstered lining 1.
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Vehicles without reclining rear seats: fold
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upholstered lining 1 upwards.
Turn the support on the rear side of uphol‐
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stered lining 1 by 90°.
Upholstered lining 1 will remain folded
upwards.
Attach the ISOFIX or i‑Size child restraint sys‐
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tem to both mounting brackets
vehicle.
Mercedes-Maybach vehicles with reclin‐
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ing rear seats: return the reclining rear seat
backrest to an upright position.
The reclining rear seat backrest must be in
contact with the child restraint system.
Vehicles with a third row of seats:
2 in the
Attach the ISOFIX child restraint system to
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both ISOFIX mounting brackets 1.
Occupant safety 67