Mercedes-Benz CL-Class 2006 Owner's Manual page 433

Practical advice
Display messages
Display messages
Rectify tyre
pressure(s)
Run Flat Indicator Check tyre pressures
and then restart
inoperative
Tyre press. monitor currently unavailable
Tyre press. monitor inoperative
inoperative
No wheel sensors
412
Possible cause/consequence
There is insufficient pressure in one or
more tyres or the tyre pressures on in-
dividual wheels differ too much.
There was a tyre pressure loss warning
message.
The tyre pressure loss warning system
is unavailable due to a malfunction.
The tyre pressure monitor* is some-
times not operational because:
the wheel electronics unit has over-
heated
the on-board voltage is too low
no sensor signals can be received
due to radio interference
The tyre pressure monitor* is faulty.
The tyre pressure monitor* is deacti-
vated because wheels without the ap-
propriate sensors are fitted to the
vehicle.
Possible solution
Check the tyre pressures and correct
them if necessary ( page 382).
Make sure that all tyres are adjusted to
the correct pressure.
Restart the tyre pressure loss warning
system ( page 383).
Visit a qualified specialist workshop.
The tyre pressure monitor* is restarted
automatically as soon as the cause has
been rectified.
Have the tyre pressure monitor* checked
at a qualified specialist workshop.
The tyre pressure monitor* is reactivated
automatically after a few minutes of driv-
ing as soon as wheels with the appropri-
ate sensors are fitted again.