284 Vehicle care
If a tyre loses pressure the control
indicator w illuminates, a warning
chime is given and a warning
message is displayed in the Driver
Information Centre.
Control indicator w 3 104.
In this case reduce speed, avoid
sharp cornering and strong braking.
Stop at next safe opportunity and
check tyre pressure.
After adjusting tyre pressure initialise
system to extinguish the control
indicator and restart system.
Caution
Deflation detection system warns
just about low tyre pressure
condition and does not replace
regular tyre maintenance by the
driver.
In case of a system malfunction a
message is displayed in the Driver
Information Centre. Set correct tyre
pressure and reinitialise system. If the
failure continues to be displayed,
contact a workshop. The system is
inoperable when ABS or ESC has a
malfunction or a temporary spare
wheel is used. Once the road tyre has
been refitted, check the tyre pressure
with cold tyres and initialise the
system.
System initialisation
After tyre pressure correction or
wheel change, the system must be
initialised to learn new circumference
reference values:
1. Always ensure that all four tyres
have correct tyre pressure
3 311.
2. Apply parking brake.
3. Depending on version, start the
initialisation procedure:
Initialise the deflation detection
system in the Info Display 3 108.
Initialise the deflation detection
system in the vehicle
personalisation 3 114.
4. Reset is confirmed by pop-up
indication.
After initialisation system
automatically calibrates to new tyre
pressures during driving. After longer
drive the system will adopt and
monitor new pressures.
Always check tyre pressure with cold
tyres.
System has to be reinitialised when:
● Tyre pressure has been changed
● Load condition has been
changed
● Wheels have been swapped or
exchanged
The system will not warn
instantaneously on a tyre blow out or
a rapid deflation. This is due to
required calculation time.
Tread depth
Check tread depth at regular
intervals.
For safety reasons, it is
recommended that the tread depth of
the tyres on one axle should not vary
by more than 2 mm.
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