Mercedes-Benz M-Class 2007 Owners Manual User Manual

Page 381

380

Operation

Tires and wheels

Reactivating the TPMS

The TPMS must be reactivated when you
have adjusted the tire inflation pressure to
a new level (e.g. because of different load
or driving conditions). The TPMS is then
recalibrated to the current tire inflation
pressures.

Using the tire placard on the driver’s
door B-pillar (

୴

page 369) or, if avail-

able, the supplemental tire pressure
information on the inside of the fuel
filler flap (

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page 374), make sure the

tire inflation pressure of all four tires is
correct.

Underinflation also reduces fuel efficiency

and tire tread life, and may affect the vehi-

cle’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.

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 com-

bined 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 subse-

quent vehicle start-ups as long as the mal-

function 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 in-

compatible 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.

If a condition causing the TPMS to malfunc-

tion develops, it may take up to 10 minutes for
the system to signal a malfunction using the
TPMS telltale flashing and illumination se-
quence.

The telltale extinguishes after a few minutes driv-
ing if the malfunction has been corrected.

Operating radio transmission equipment

(e.g. wireless headsets, two-way radios) in or
near the vehicle could cause the TPMS to mal-
function.

Warning!

It is the driver’s responsibility to calibrate

the TPMS on the recommended cold infla-

tion pressure. Underinflated tires affect the

ability to steer or brake the vehicle. You

might lose control over the vehicle.

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