Manual Mercedes GLA 2019 (page 314 of 346) (English)

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monitor warns you if the pressure drops in one

or more of the tires. The tire pressure monitor

only functions if the corresponding sensors

are installed in all wheels.

Information on tire pressures is displayed in

the multifunction display. After a few minutes

of driving, the current tire pressure of each tire

is shown in the Serv.Serv. menu of the multifunc-

tion display, see illustration (example).

For information on the message display, refer

to the "Checking the tire pressure electroni-

cally" section (Y page 313).

Important safety notes

WARNING

Each tire, including the spare (if provided),

should be checked at least once every two

weeks when cold and inflated to the pres-

sure recommended by the vehicle manufac-

turer on the Tire and Loading Information

placard on the driver's door B-pillar or the

tire pressure label on the inside of the fuel

filler flap. If your vehicle has tires of a differ-

ent size than the size indicated on the Tire

and Loading Information placard or, if availa-

ble, the tire pressure label, you should

determine the proper tire pressure for those

tires.

As an added safety feature, your vehicle has

been equipped with a tire pressure monitor-

ing system (TPMS) that illuminates a low tire

pressure telltale when one or more of your

tires are significantly underinflated. Accord-

ingly, when the low tire pressure telltale

lights up, you should stop and check your

tires as soon as possible, and inflate them to

the proper pressure. Driving on a signifi-

cantly 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 vehi-

cle's handling and stopping ability. Please

note that the TPMS is not a substitute for

proper tire maintenance, and it is the driv-

er'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 combined

with the low tire pressure telltale. When the

system detects a malfunction, the warning

lamp will flash for approximately a minute

and then remain continuously illuminated.

This sequence will be repeated every time

the vehicle is started as long as the malfunc-

tion exists. When the malfunction indicator

is illuminated, the system may not be able to

detect or signal low tire pressure as inten-

ded.

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.

It is the driver's responsibility to set the tire

pressure to that recommended for cold tires

which is suitable for the operating situation

(Y page 307). Note that the correct tire pres-

sure for the current operating situation must

first be taught-in to the tire pressure monitor.

If a substantial loss of pressure occurs, the

warning threshold for the warning message is

aligned to the taught-in reference values.

Restart the tire pressure monitor after adjust-

ing the pressure of the cold tires

(Y page 314). The current pressures are

saved as new reference values. As a result, a

warning message will appear if the tire pres-

sure drops significantly.

312

Tire pressure

Wheels and tires

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Mercedes GLA 2019 Manual

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