BMW M3 Convertible, Owner'S Manual

Page: 87 / 174

87
Flat Tire Monitor
The concept
As you drive, the Flat Tire Monitor
keeps track of pressure levels in all four
tires. The system alerts you whenever
the inflation pressure of a tire falls sig-
nificantly below the pressure of another
tire.
In the event of tire pressure loss, the
rolling radius of the tire changes, and
thereby the rotational speed of the
wheel. This change is detected, and a
flat tire warning is issued to the driver.
Functional requirements
To ensure a reliable flat tire warning,
the system must be initialized with the
correct tire inflation pressures.
Initialize the system immediately
after you have corrected a tire
inflation pressure, or changed the tire
or wheel.
<
System limitations
The Flat Tire Monitor cannot pro-
vide you with advance warning of
sudden and severe tire damage caused
by external factors and does not detect
the balanced and very gradual pressure
loss that takes place in all four tires
over an extended period of time.
<
The system could issue a false warning
or function in a delayed manner in the
following situations:
>
System was not initialized
>
You are driving on a snow-covered or
slippery road surface
>
Performance-oriented driving: slip at
the drive wheels, high levels of lateral
acceleration
>
You are driving with snow chains.
Initializing the system
The initialization is completed
while you are driving, and can be
interrupted at any time. Initialization is
automatically continued when you con-
tinue driving. When driving with snow
chains, do not initialize the system.
<
1. Before driving off, start the engine
but do not start driving
2. Press the button as long as you need
to, but no more than 8 seconds, until
the indicator lamp in the instrument
cluster lights up in yellow for several
seconds
3. Drive off. Initialization is completed
during the drive without any feed-
back issued.
When driving with snow chains,
do not initialize the system.
<
Overview
Controls
Maintenance
Repairs
Data
Index