2008 MERCEDES-BENZ CLS63AMG inflation pressure

370 Practical hints
What to do if …
Display messagePossible cause/consequencePossible solution
Tire pressure
is only displayed
after driving for
a few minutes
Vehicles with Advanced TPMS*:
The tire inflation pressure is being
checked.Drive the vehicle for a few minutes.
Tire Pressure
Monitor
Currently UnavailableThe TPMS or Advanced TPMS* is un-
able to monitor the tire pressure due
to a nearby radio interference
source.As soon as the causes for the malfunction are
no longer present, the Advanced TPMS* auto-
matically becomes active again after a few
minutes driving.
Tire Pressure
Monitor
InoperativeThe TPMS or Advanced TPMS* is
malfunctioning.Have the TPMS or Advanced TPMS* checked
by an authorized Mercedes-Benz Center.
Have the wheel sensors installed by an
authorized Mercedes-Benz Center.
Warning!G
Do not drive with a flat tire. A flat tire affects
the ability to steer or brake the vehicle.
You may lose control of the vehicle. Contin-
ued driving with a flat tire will cause exces-
sive heat build-up and possibly a fire.

371 Practical hints
What to do if …
Display messagePossible cause/consequencePossible solution
Tire Pressure
Monitor
Inoperative
No Wheel SensorsThere are wheels without appropri-
ate wheel sensors mounted (e.g.
winter tires).Have the TPMS or Advanced TPMS* checked
by an authorized Mercedes-Benz Center.
Have the appropriate wheel sensors installed
by an authorized Mercedes-Benz Center.
Tire Pres. Monitor
Wheel Sensor MissingVehicles with Advanced TPMS*:
One or more sensors malfunction
(e.g. battery in one or more wheel
sensors is empty).
One or more wheels without appro-
priate wheel sensors mounted (e.g.
spare tire).Have the Advanced TPMS* checked at an au-
thorized Mercedes-Benz Center.
Have the wheel sensors installed at an
authorized Mercedes-Benz Center.
The tire pressure for the respective tire is
shown in the multifunction display.
One or more wheels without appro-
priate wheel sensors mounted (e.g.
spare tire).
The respective tire is indicated by ---
instead of the tire inflation pressure
in the multifunction display.Have the Advanced TPMS* checked at an au-
thorized Mercedes-Benz Center.
Have the appropriate wheel sensors installed
at an authorized Mercedes-Benz Center.
Warning!G
Do not drive with a flat tire. A flat tire affects
the ability to steer or brake the vehicle. You may lose control of the vehicle. Contin-
ued driving with a flat tire will cause exces-
sive heat build-up and possibly a fire.

390 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
HPlease correct
the tire pressure.The pressure is too low in one or more
tires.Check and correct tire inflation pressure as
required (
page 303).
Tire Pressure
Caution
Tire DefectOne or more tires are deflating.Carefully bring the vehicle to a halt, avoiding
abrupt steering and braking maneuvers.
If necessary, change the wheel (page 412).
Have the damaged wheel repaired or replaced
at an authorized Mercedes-Benz Center.
Tire Pressure
Check TiresVehicles with Advanced TPMS*:
The tire pressure in one or more tires
is already below the minimum value.Carefully bring the vehicle to a halt, avoiding
abrupt steering and braking maneuvers.
Check and adjust tire pressure as required.
If necessary, change the wheel (page 412).
Have the damaged wheel repaired or replaced
at an authorized Mercedes-Benz Center.
Warning!G
Do not drive with a flat tire. A flat tire affects
the ability to steer or brake the vehicle.
You may lose control of the vehicle. Contin-
ued driving with a flat tire will cause exces-
sive heat build-up and possibly a fire.

417 Practical hints
Flat tire
1Flap
2Air pump switch
3Electrical plug
4Air hose with pressure gauge and vent
screw
5Union nut
Open flap1 on the air pump.
Pull out electrical plug3 and air hose
with pressure gauge4.
Make sure the vent screw on air
hose4 is closed.
Remove the valve cap from the tire
valve.
Screw union nut5 onto the tire valve.
Insert electrical plug3 into vehicle
cigarette lighter socket (
page 249).
Turn the SmartKey in the starter switch
to position1.
or
Press the KEYLESS-GO* start/stop
button on the gear selector lever once
without depressing the brake pedal.
Press I on electric air pump switch2.
The electric air pump should now
switch on and inflate the tire.
Inflate the tire to approximately 51 psi
(3.5 bar).
This takes about 5 minutes for the col-
lapsible tire. Air hose4 and union
nut5 can become hot during infla-
tion. Exercise proper caution to avoid
burning yourself when using the equip-
ment.
Press 0 on electric air pump switch2.
Turn the SmartKey in the starter switch
to position0.
or
Press KEYLESS-GO* start/stop button
on the gear selector lever twice without
depressing the brake pedal.
The electric air pump should now be
switched off.
If the tire inflation pressure is above
51 psi (3.5 bar), release excess tire in-
flation pressure using the vent screw.
!Do not operate the air pump longer than
8 minutes without interruption. Otherwise it may
overheat.
You may operate the air pump again after it has
cooled off.


418 Practical hints
Flat tire
Detach the electric air pump.
Stow electrical plug3 and air hose4
behind flap1 and place the air pump
back in the trunk.Lowering the vehicle
Lower vehicle by turning crank coun-
terclockwise until vehicle is resting ful-
ly on its own weight.
Remove the jack.
1-5 Wheel bolts
Tighten the five wheel bolts evenly, fol-
lowing the diagonal sequence illustrat-
ed (1 to 5), until all bolts are tight.
Observe a tightening torque of 96 lb-ft
(130 Nm).
Before storing the jack in the trunk, it
should be fully collapsed.
Warning!G
Follow recommend inflation pressures.
Do not overinflate tires. Overinflating tires
can result in sudden deflation (blowout)
because they are more likely to become
punctured or damaged by road debris,
potholes, etc.
Do not underinflate tires. Underinflated tires
wear unevenly, adversely affect handling
and fuel economy, and are more likely to fail
from being overheated.
iVehicles with Advanced TPMS*:
Do not activate the tire inflation pressure moni-
tor (
page 309) until a full size wheel/tire with
functioning sensor has been placed back into
service on the vehicle.
Warning!G
Have the tightening torque checked after
changing a wheel. The wheels could come
loose if they are not tightened to a torque of
96 lb-ft (130 Nm).
iWrap the damaged wheel in the protective
film that comes with the spare wheel and put the
wheel in the trunk.
You can also place the damaged wheel down into
the spare wheel well. In this case, you must stow
the luggage bowl in the trunk.


419 Practical hints
Flat tire
MOExtended system*
The MOExtended system allows you to
continue driving your vehicle even if there
is a total loss of pressure in one or more
tires.
You may only use the MOExtended system
in conjunction with Tire Pressure Monitor-
ing System (U.S. vehicles), Run Flat Indica-
tor (Canada vehicles), or Advanced Tire
Pressure Monitoring System* (Canada
only).
!The maximum distance in emergency mode
depends on the vehicle’s load. It is 30 miles
(50 km) if the vehicle is partially loaded and
18 miles (30 km) if the vehicle is fully loaded.
The point at which the maximum driving distance
begins in emergency mode is when the warning
message appears in the multifunction display
indicating that there is a loss of tire inflation
pressure.
Do not exceed the maximum speed of 50 mph
(80 km/h).
Warning!G
In emergency mode, your vehicle’s driving
characteristics are diminished in such situa-
tions as:

driving around curves

while braking

while accelerating rapidly
Therefore, your driving style must be adapt-
ed accordingly. Avoid abrupt steering and
driving maneuvers, as well as driving over
obstacles (road curbs, potholes, or off-road
areas). This is especially important if the
vehicle is heavily loaded.
The emergency driving distance that can be
achieved greatly depends on the demands
placed on the vehicle. Depending on speed,
load, driving maneuvers, road conditions,
outside temperature, etc., the distance can
be significantly shorter or, if the vehicle is
driven cautiously, somewhat longer.
Do not continue driving in emergency mode
if

you notice knocking sounds

the vehicle starts to shake

smoke develops and you smell rubber

ESP® is intervening continuously

you notice tears on the tire sidewalls
After driving in emergency mode, you must
have the rims inspected by an authorized
Mercedes-Benz Center to check if they are
suitable for further use. The failed tire must
be replaced in any case.
iWhen replacing individual or all tires on the
vehicle, make sure only matching tires marked
with “MOExtended” are mounted in the size
specified for your vehicle (
page 444).

438 Technical data
Rims and tires
!Only use tires which have been tested and
approved by Mercedes-Benz. Tires approved by
Mercedes-Benz are developed to provide best
possible performance in conjunction with the
driving safety systems on your vehicle such as
ABS or ESP
®. Tires specially developed for your
vehicle and tested and approved by
Mercedes-Benz can be identified by finding the
following on the tire’s sidewall:

MO = Mercedes-Benz Original equipment
tires

MOE = Mercedes-Benz Original Extended
(tires with limited run-flat characteristics)
original equipment tires
Using tires other than those approved by
Mercedes-Benz may result in damage that is
not covered by the Mercedes-Benz Limited
Warranty.
iFor information on driving with MOExtended
tires, see “MOExtended system*” (
page 313).
!Using tires other than those approved by
Mercedes-Benz can have detrimental effects,
such as

poor handling characteristics

increased noise

increased fuel consumption
Moreover, tires and rims not approved by
Mercedes-Benz may, under load, exhibit dimen-
sional variations and different tire deformation
characteristics that could cause them to come
into contact with the vehicle body or axle parts.
Damage to the tires or the vehicle may be the re-
sult.
iFurther information on tires and rims is
available at any authorized Mercedes-Benz
Center. A placard with the recommended tire in-
flation pressures is located on the driver’s door
B-pillar. Some vehicles may have supplemental
tire inflation pressure information for driving at
high speeds (
page 302) or for vehicle loads
less than the maximum loaded vehicle condition
(
page 302). If such information is provided, it
can be found on the placard located on the in-
side of the fuel filler flap. The tire inflation pressure should be checked
regularly and should only be adjusted on cold
tires. Follow tire manufacturer’s maintenance
recommendation included with vehicle.
iThe following pages also list the approved
wheel rim and tire sizes for equipping your vehi-
cles with winter tires. Winter tires are not avail-
able as standard or optional factory equipment,
but can be purchased from an authorized
Mercedes-Benz Center.
Depending on vehicle model and the standard or
optional factory-equipped wheel rim/tire config-
uration on your vehicle (Appearance Package,
AMG Sport Package etc.), equipping your vehicle
with winter tires approved for your vehicle model
may also require the purchase of two or four
wheel rims of the recommended size for use with
these winter tires. See an authorized
Mercedes-Benz Center for more information.

445 Technical data
Rims and tires
Spare wheel
ModelCLS 550
CLS 550 (AMG Sport Package*)CLS 63 AMGCLS 63 AMG
(Performance Package*)
Rim4.0Bx17H26.0 B x 18 H26.5 B x 19 H2
Wheel offset1.34 in (34 mm)0.98 in (25 mm)0.55 in (14 mm)
Minispare tire1
1Must not be used with snow chains.
T 155/70 R17 110M – –
Collapsible tire1 –175/55-18 95P175/50-19 97P
!Please compare the recommended tire in-
flation pressure for your vehicle with the tire in-
flation pressure on the yellow label located on
the spare wheel rim.
If the tire inflation pressure on the yellow label
on the spare wheel rim differs from the values
given in this Operator’s Manual, inflate the spare
wheel tire to the recommended tire inflation
pressure given on the yellow label on the spare
wheel rim.iPlease note that the tire inflation pressure of
the Minispare tire and the collapsible tire differs
from the tire inflation pressure of the road tires.
Make sure the Minispare tire is inflated to ap-
proximately 61 psi (4.2 bar).
Inflate the collapsible tire to approximately
51 psi (3.5 bar).