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Underinflation also reduces fuel efficiency
and tire tread life, and may affect the vehicle’s
handling and stopping ability. Please note that
the TPMS is not a substitute for proper tire
maintenance, and it is the driver’s
responsibility to maintain correct tire
pressure, even if underinflation has not
reached the level to trigger illumination of the
TPMS low tire pressure telltale.
USA only:
Your vehicle has also been equipped with a
TPMS malfunction indicator to indicate when
the system is not operating properly. The
TPMS malfunction indicator is combined with
the low tire pressure telltale. When the
system detects a malfunction, the telltale will
flash for approximately 1 minute and then
remain continuously illuminated. This
sequence will continue upon subsequent
vehicle start-ups as long as the malfunction
exists. When the malfunction indicator is
illuminated, the system may not be able to
detect or signal low tire pressure as intended.
TPMS malfunctions may occur for a variety of
reasons, including the installation of
incompatible replacement or alternate tires
or wheels on the vehicle that prevent the
TPMS from functioning properly. Always
check the TPMS malfunction telltale after
replacing one or more tires or wheels on your
vehicle to ensure that the replacement or
alternate tires and wheels allow the TPMS to
continue to function properly.
Lamp in center console
Problem Possible causes/consequences and M Solutions
Canada only:
45
The front passenger
front air bag off
indicator lamp
illuminates and
remains illuminated
(Y page 47).
A BabySmart
TM
child seat is installed on the front passenger seat.
Therefore the front passenger front air bag is switched off.
The system is malfunctioning when there is no BabySmart
TM
child
seat installed on the front passenger seat.
X
Have the system checked as soon as possible at an authorized
Mercedes-Benz Center.
Canada only:
45
The front passenger
front air bag off
indicator lamp does not
illuminate or does not
remain illuminated with
a BabySmart
TM
child
seat properly installed
on the passenger seat.
The system is malfunctioning.
X
Make sure there is nothing between seat cushion and child seat.
X
Check installation of the child seat (Y page 58).
If the front passenger front air bag off indicator lamp remains out:
X
Have the system checked as soon as possible at an authorized
Mercedes-Benz Center.
Do not use the BabySmart
TM
restraint to transport children on the
front passenger seat until the system has been repaired.
What to do if …
313
Practical hints
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