Indicator – Mercedes-Benz S-Class 2008 Owners Manual User Manual

Page 566

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565

Operation

Tires and wheels

Run Flat Indicator (Canada only)

While the vehicle is being driven, the Run
Flat Indicator monitors the set tire inflation
pressures by evaluating each wheel’s rota-
tional speed. This allows the system to de-
tect a significant loss of pressure in a tire.
If a wheel’s rotational speed changes due
to falling tire inflation pressure, you will
see a corresponding warning message in
the multifunction display.

The Run Flat Indicator may function in a re-
stricted manner or with a delay if:

ț

snow chains are mounted to the
vehicle

ț

in presence of ice and snow

ț

you are driving on a loose surface (e.g.
sand or gravel)

ț

you are driving in a very sporty manner
(involving rapid acceleration or high
speeds in curves)

Warning!

G

When the multifunction display shows the

message “

Tire pressure Check tires

”, one or

more of your tires is significantly under-in-

flated. You should stop and check your tires

as soon as possible, and inflate them to the

proper tire inflation pressure as indicated on

the vehicle’s tire information placard. Driv-

ing on a significantly underinflated tire caus-

es the tire to overheat and can lead to tire

failure. Underinflation also reduces fuel effi-

ciency and tire tread life, and may affect the

vehicle’s handling and stopping ability. Each

tire, including the spare, should be checked

monthly when cold and set to the tire infla-

tion pressure recommended by the vehicle

manufacturer on the vehicle placard or the

tire inflation pressure label.

Warning!

G

The Run Flat Indicator does not provide a

warning for wrongly selected tire inflation

pressures. Always adjust tire inflation pres-

sure according to the placard on the driver’s

door B-pillar or fuel filler flap.

The Run Flat Indicator does not replace reg-

ular checks of the tire inflation pressures

since a gradual pressure loss in more than

one tire cannot be detected by the Run Flat

Indicator.

The Run Flat Indicator is not able to issue a

warning due to a sudden dramatic loss of

tire inflation pressure (e.g. tire blowout

caused by a foreign object). In this case

bring the vehicle to a halt by carefully apply-

ing the brakes and avoiding abrupt steering

maneuvers.

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