If a tire loses pressure, the diameter and
thus the rotational speed of the correspond-
ing wheel changes. The difference will be
detected and reported as a flat tire.
Functional requirements
If the following requirements are not met
for the Flat Tire Monitor, a loss in tire pres-
sure may not be reliably reported:
– After a tire or wheel change, an initiali-
zation was carried out at the correct tire
pressure.
– After the tire pressure was adjusted to
a new value, an initialization was per-
formed.
Status display
The current status of the Flat Tire Monitor
can be displayed on the Interaction Unit,
e.g., to check whether the Flat Tire Monitor
is active.
Go through the menu as follows: Apps
menu / "Vehicle" / "Vehicle status" / "Flat
Tire Monitor".
The status is displayed.
Initialization required
The Flat Tire Monitor must be initialized in
the following situations:
– After the tire inflation pressure has
been adjusted.
– After a tire or wheel change.
Performing initialization
When initializing, the set tire inflation
pressures serve as reference values in order
to detect a flat tire. Initialization is started
by confirming the tire inflation pressures.
Do not initialize the system when driving
with snow chains.
To initialize the Flat Tire Monitor, proceed
as follows:
1. Go through the menu as follows: Apps
menu / "Vehicle" / "Vehicle status" /
"Flat Tire Monitor".
2. Turn on drive-ready state but do not
drive off.
3. "Perform reset".
4. Drive off.
The initialization is completed while driv-
ing, which can be interrupted at any time.
The initialization automatically continues
when driving continues.
Messages
General information
The Tire Pressure Monitor displays a mes-
sage when a tire is flat.
When a flat tire is indicated, the Dynamic
Stability Control (DSC) is turned on, if
needed.
Safety information
Warning
A damaged regular tire with low or no tire
inflation pressure impacts handling such
as steering and braking response. Runflat
tires can maintain limited stability. There
is a risk of accident. Do not continue driv-
ing if the vehicle is equipped with normal
tires. Follow the information on runflat
tires and continued driving with these
tires.
Indication of a flat tire
The Flat Tire Monitor displays a message
when a tire is flat.
Seite 308
MOBILITY Wheels and tires
308
Online Edition for Part no. 01405B37A59 - II/24
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