Mercedes-Benz GLS Owner's Manual page 66

Size class – Left/right rear seat
Equipment
C – ISO/R3 X
IL Suitable for ISOFIX child restraint systems according to the
table in "Overview of the recommended child restraint systems",
or if the vehicle and the seat are listed on the child restraint sys‐
tem manufacturer's vehicle model list.
X Not suitable for an ISOFIX child restraint system in this weight
group and/or size class.
Weight group 1 (9–18 kg and approx. 9
months up to 4 years) for second row of
seats
Size class – Left/right rear seat
Equipment
D – ISO/R2, IL
ISO/R2X
C – ISO/R3 IL (1)
B – ISO/F2 IUF
Size class – Left/right rear seat
Equipment
B1 – ISO/F2X IUF
A – ISO/F3 IUF
IL Suitable for ISOFIX child restraint systems according to the
table in "Overview of the recommended child restraint systems",
or if the vehicle and the seat are listed on the child restraint sys‐
tem manufacturer's vehicle model list.
IUF Suitable for forward-facing ISOFIX child restraint systems of
the "Universal" category in this weight group.
(1) When using a child restraint system of size class (ISO/R3),
move the front seat into the highest position. Make sure that the
seat backrest of the front seat does not rest against the child
restraint system.
Occupant safety
Weight group 1 (9–18 kg and approx. 9
months up to 4 years) for third row of seats
Size class – Left/right rear seat
Equipment
D – ISO/R2, X
ISO/R2X
C – ISO/R3 X
B – ISO/F2 IUF
B1 – ISO/F2X IUF
A – ISO/F3 IUF
X Not suitable for an ISOFIX child restraint system in this weight
group and/or size class.
IUF Suitable for forward-facing ISOFIX child restraint systems of
the "Universal" category in this weight group.
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