Mercedes-Benz 2009 CL-Class Operator's Manual page 540

Practical hints
What to do if ...
more of your tires are significantly
underinflated. Accordingly, when the low
tire pressure telltale illuminates, you should
stop and check your tires as soon as
possible, and inflate them to the proper
pressure. Driving on a significantly
underinflated tire causes the tire to
overheat and can lead to tire failure.
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
Lamp in center console
Problem
59
The front passenger front air bag
off indicator lamp illuminates and
remains illuminated with the
weight of a typical adult or
someone larger than a small
individual on the front passenger
seat.
538
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
Possible cause/consequence
The system is malfunctioning.
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
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.
Suggested solutions
X
Have the system checked as soon as possible at an authorized
Mercedes-Benz Center.
X
Read and observe messages in the multifunction display and follow
corrective steps ( Y page 475).