X
Secure the vehicle against rolling away
(Y page 180).
X Switch off all electrical consumers.
X Turn the key to position 0in the ignition
lock and remove it (Y page 159).
or
X On vehicles with KEYLESS-GO, make sure
the ignition is switched off (Y page 159).
All indicator lamps in the instrument cluster
must be off.
The fuses are located in various fuse boxes:
R fuse box in the engine compartment on the
left-hand side of the vehicle, when viewed
in the direction of travel
R CLS Coupé: fuse box located in the boot on
the right-hand side when viewed in the
direction of travel
R CLS Shooting Brake: fuse box located in
the luggage compartment on the right-
hand side when viewed in the direction of
travel
CLS Coupé: the fuse allocation chart is loca-
ted in the vehicle tool kit in the stowage com-
partment under the boot floor (Y page 345).
CLS Shooting Brake: the fuse allocation
chart is located in the vehicle tool kit in the
stowage compartment under the luggage
compartment floor (Y page 345).Fuse box in the engine compartment
Observe the important safety notes
(Y page 360) G
WARNING
When the bonnet is open, and the windscreen wipers are set in motion, you can be injured by
the wiper linkage. There is a risk of injury.
Always switch off the windscreen wipers and
the ignition before opening the bonnet.
! Make sure that no moisture can enter the
fuse box when the cover is open. !
When closing the cover, make sure that it
is lying correctly on the fuse box. Moisture
seeping in or dirt could otherwise impair
the operation of the fuses.
X Make sure that the windscreen wipers are
switched off.
X Open the bonnet. X
Remove any existing moisture from the
fuse box using a dry cloth.
X To open: take lines ;out of the guides.
X Move lines ;to one side. Route the lines
behind connection =to do this.
X Open retaining clamps :.
X Remove the fuse box cover forwards.
X To close: check whether the rubber seal is
seated correctly in the cover.
X Insert the cover at the rear of the fuse box
into the retainer.
X Fold down cover and close clamps :.
X Secure lines ;in the guides.
X Close the bonnet. Fuse box in the boot (CLS Coupé)
Observe the important safety notes
(Y page 360)
! Make sure that no moisture can enter the
fuse box when the cover is open.
! When closing the cover, make sure that it
is lying correctly on the fuse box. Moisture seeping in or dirt could otherwise impair
the operation of the fuses. Electrical fuses
361Breakdown assistance Z
the notes on the recommended tyre pressure
(Y page 367).
The tyre pressure monitor is not able to warn you of a sudden loss of pressure, e.g. if the
tyre is punctured by a foreign object. In the
event of a sudden loss of pressure, bring the
vehicle to a halt by braking carefully. Avoid
abrupt steering manoeuvres.
The tyre pressure monitor has a yellow warn-
ing lamp in the instrument cluster for indicat-
ing a pressure loss or malfunction. Depending on how the warning lamp flashes or lights up,
a tyre pressure that is too low or a malfunc-
tion in the tyre pressure monitor is indicated:
R if the warning lamp is lit continuously, the
tyre pressure on one or more tyres is sig-
nificantly too low. The tyre pressure moni-
tor is not malfunctioning.
R if the warning lamp flashes for around a
minute and then remains lit constantly, the
tyre pressure monitor is malfunctioning.
i In addition to the warning lamp, a mes-
sage appears in the multifunction display.
Further information can be found at
(Y page 280).
If the tyre pressure monitor is malfunctioning,
it may take more than ten minutes for the tyre pressure warning lamp to inform you of the
malfunction by flashing for approximately one
minute and then remaining lit. When the fault
has been rectified, the tyre pressure warning lamp goes out after you have driven for a few
minutes.
The tyre pressure values indicated by the on- board computer may differ from those meas-
ured at a filling station using a pressure
gauge. The tyre pressures shown by the on-
board computer refer to those measured at
sea level. At high altitudes, the tyre pressure
values indicated by a pressure gauge are
higher than those shown by the on-board
computer. In this case, do not reduce the tyre
pressures.
The operation of the tyre pressure monitor
can be affected by interference from radio transmitting equipment (e.g. radio head-
phones, two-way radios) that may be being
operated in or near the vehicle.
Checking the tyre pressure electroni-
cally X
Make sure that the key is in position 2in the
ignition lock (Y page 159).
X Press the =or; button on the steer-
ing wheel to select the Service
Service menu.
X Press the 9or: button to select
Tyre pressure Tyre pressure.
X Press the abutton.
The current tyre pressure for each wheel
will be displayed in the multifunction dis-
play.
If the vehicle has been parked for over
20 minutes, the Tyre Tyrepressures
pressures will
willbe
be
displayed after a few minutes of
displayed after a few minutes of
driving driving message appears.
After a teach-in period, the tyre pressure
monitor automatically detects new wheels or new sensors. As long as a clear allocation of
the tyre pressure values to the individual
wheels is not possible, the Tyre pressure Tyre pressure
monitor active monitor active display message is shown
instead of the tyre pressure display. The tyre
pressures are already being monitored.
i If an emergency spare wheel is fitted, for
a few minutes the system may continue to
show the tyre pressure of the wheel that
has been removed. If this occurs, note that the value displayed for the position where
the spare wheel is fitted is not the same asthe current tyre pressure of the emergencyspare wheel. Tyre pressure
371Wheels and tyres Z
