Troubleshooting for Tyre Pressure
Monit
oring System
Low tyre pressure
The indicator lamp lights up yellow.
T
ext message: Flat tyre! The tyre pressure
of one or more tyres is below 1.4 bar
(20 psi/140 kPa) or there is a critical loss of
tyre pressure.
1.
Stop the vehicle immediately in
a pla
ce where it is safe from moving
trac.
2. Check the tyres for visible damage
→ page 355.
3. If the tyre is not visibly damaged, drive
to the nearest filling station at low
speed. Then check the tyre pressures
and adjust if necessary.
4. If the tyre is damaged, change the dam-
aged wheel → page 364. If necessary,
seek assistance from a suitably quali-
fied workshop.
Or: Use the breakdown set to seal the
damaged tyre and then inflate it
→ page 374.
Text message: Tyre pressures too low! The
warning indicates at least one tyre with
a critical tyre pressure.
1. Check the tyre pressure of all tyres and
adjust if necessary → page 350.
2. If the tyre cannot maintain the tyre
pressure, have the tyre replaced.
Or: Replace the damaged wheel with
a spare wheel or temporary spare
wheel and go to a suitably qualified
workshop. → page 364.
Or: Seal the damaged tyre with the
breakdown set and go to a suitably
qualified workshop.→ page 374
Text message: Please check tyre pres-
sures. The warning indicates at least one
tyre with a reduced tyre pressure.
1. Avoid long journeys and high speeds as
long as the warning is displayed.
2. Check the tyre pressure of all tyres and
adjust if necessary → page 350.
Fault in the Tyre Pressure Monitor-
ing System
The indicator lamp fla
shes for around 1 mi-
nute and then remains lit up yellow contin-
uously.
One or more wheels with a tyre pressure
sensor have been fitted but have not yet
been detected by the system.
1. Drive for a few minutes until the indica-
tor lamp goes out.
One or more wheels without a tyre pres-
sure sensor have been fitted or a tyre pres-
sure sensor is defective.
1. Fit wheels with functional tyre pressure
sensors.
There is a transmission fault between the
sensor and the system. The function of the
system may be temporarily impaired if
there is interference from signals in the
same frequency range as these transmit-
ters.
1. Switch o or avoid any disruptive sour-
ces, e.g. wireless devices, remote con-
trols or children's toys.
Metal valve caps have been screwed onto
the tyre valves and are blocking the radio
signal from the tyre pressure sensors.
1. Replace metal valve caps with plastic
valve caps.
There is a system fault.
1. Switch the ignition o and then back on
again. If the fault persists, consult
a suitably qualified workshop.
Changing a wheel
Introduction
Y
ou should carry out a wheel change your-
self only when the vehicle is parked safely,
you are familiar with the safety procedures
and have access to the correct equipment.
Some models are delivered from the facto-
ry without a jack or box spanner. If this is
the case, have the wheel change carried
out by a suitably qualified workshop.
If the vehicle is delivered from the factory
with a jack, this must be used only if one
wheel on the vehicle is damaged and has
364
Wheels and tyres
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