2006 MERCEDES-BENZ C55AMG run flat

320 Operation
Tires and wheels
Switch on the ignition (page 33).
The standard display menu appears in
the multifunction display (
page 130).
Press buttonk orj repeatedly
until the following message appears in
the multifunction display:
Run Flat Indicator
active
Reactivation possible: +
Press buttonæ.
The following message will appear in
the multifunction display:
Tire pres. OK now?
If you wish to confirm activation:
Press buttonæ.
The following message will appear in
the multifunction display:
Run Flat Indicator
Reactivated
After a certain “learning phase”, the Run
Flat Indicator checks the set pressure
values for all four tires.
If you wish to cancel activation:
Press buttonç.
or
Wait until the message
Tire pres. OK now?
disappears.Potential problems associated with
underinflated and overinflated tires
Underinflated tires
Underinflated tires can:

cause excessive and uneven tire wear

adversely affect fuel economy

lead to tire failure from being
overheated

adversely affect handling
characteristics
Warning!G
The Run Flat Indicator* can only warn you in
a reliable manner if you have set the correct
tire inflation pressures for each tire.
If an incorrect tire inflation pressure was
set, the system will monitor the pressure
according to the incorrect value.
Warning!G
Follow recommended tire inflation pres-
sures.
Do not underinflate tires. Underinflated tires
wear excessively and / or unevenly,
adversely affect handling and fuel economy,
and are more likely to fail from being
overheated.

360 Practical hints
What to do if …
Text messages
Display messagePossible cause/consequencePossible solution
ABSmalfunction
Visit workshopThe ABS has detected a malfunction and
has switched off. The ESP®, BAS and the
Run Flat Indicator* are also deactivated.
The brake system is still functioning
normally but without the systems speci-
fied above.
Continue driving with added caution.
Wheels may lock during hard braking,
reducing steering capability.
Have the system checked at an authorized
Mercedes-Benz Center as soon as possible.
Failure to follow these instructions increases
the risk of an accident.
Display malfunction
Visit workshopThe ABS or the ABS display is
malfunctioning.Continue driving with added caution.
Wheels may lock during hard braking,
reducing steering capability.
Have the system checked at an authorized
Mercedes-Benz Center as soon as possible.
Failure to follow these instructions increases
the risk of an accident.

361 Practical hints
What to do if …
Display messagePossible cause/consequencePossible solution
ESPunavailable
See Operator’s ManualThe ESP® was deactivated because of a
malfunction or interrupted power supply.
The BAS and the Run Flat Indicator* are also
deactivated.
The ABS might not be operational.
The brake system is still functioning
normally but without the systems specified
above.Continue driving with added caution.
Visit an authorized Mercedes-Benz Cen-
ter as soon as possible.
Failure to follow these instructions
increases the risk of an accident.
If the yellow ESP® warning lampv flash-
es while driving and this message appears,
the electronic traction system has switched
off to prevent overheating of the drive wheel
brakes.As soon as the brakes have cooled off, the
electronic traction system switches on
again.
The self-diagnosis has not been completed
yet.
The ESP
®, BAS and the Run Flat Indicator*
are temporarily deactivated.
The brake system is still functioning
normally but without the systems specified
above.
The display will clear after driving a short dis-
tance at more than 12 mph (20 km/h).

362 Practical hints
What to do if …
Display messagePossible cause/consequencePossible solution
ESPunavailable
See Operator’s ManualThe charging voltage has fallen below
10 volts. The battery might not be charged
sufficiently.
The ESP
®, BAS and the Run Flat Indicator*
are deactivated.
The brake system is still functioning
normally but without the systems specified
above.
Continue driving with added caution.
If necessary, have the generator and bat-
tery checked.
When the voltage is above this value again,
the ESP
® is operational again.
malfunction
Visit workshop.The ESP® is deactivated because of a
malfunction.
The ESP
®, BAS and the Run Flat Indicator*
are deactivated.
The brake system is still functioning
normally but without the systems specified
above.
Continue driving with added caution.
Visit an authorized Mercedes-Benz Cen-
ter as soon as possible.
Failure to follow these instructions increases
the risk of an accident.
Display malfunction
Visit workshopThe ESP® or the ESP® display is
malfunctioning.Continue driving with added caution.
Visit an authorized Mercedes-Benz Cen-
ter as soon as possible.
Failure to follow these instructions increases
the risk of an accident.

364 Practical hints
What to do if …
Display messagePossible cause/consequencePossible solution
Run Flat Indicator
inactive

The Run Flat Indicator* is malfunc-
tioning.Have the Run Flat Indicator* checked by an
authorized Mercedes-Benz Center.
Check tires
Then reactivate
Run Flat Indicator

There was a warning message about
a loss in tire inflation pressure and
the Run Flat Indicator* has not been
reactivated yet.Make sure that the correct tire inflation pressure
is set for each tire.
Then reactivate the Run Flat Indicator*.
Run Flat Indicator
unavailable

The Run Flat Indicator* has been
switched off due to an error.Have the Run Flat Indicator* checked by an
authorized Mercedes-Benz Center.
Tire pressure
Check tires

The Run Flat Indicator* indicates
that the pressure is too low in one or
more tires.Carefully bring the vehicle to a halt, avoiding
abrupt steering and braking maneuvers. Observe
the traffic situation around you.
Check and adjust the tire inflation pressure as
required (
page 317).
If necessary, change the wheel (page 404).
Reactivate the Run Flat Indicator* after adjusting
the tire inflation pressure values (
page 319).
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.

383 Practical hints
Where will I find ...?
Spare wheel
The spare wheel with collapsible tire is lo-
cated in the storage compartment under-
neath the trunk floor.
Lift up trunk floor cover and engage
trunk floor handle in upper edge of
trunk.
1Spare wheel with collapsible tire
2Vehicle tool kit (under collapsible tire)
3Retaining screwRemoving the spare wheel
Loosen retaining screw3 by turning it
counterclockwise.
Remove spare wheel1.
Storing the spare wheel
If you wish to store the spare wheel after
use, carry out the following steps.
Otherwise the spare wheel will not fit the
storage compartment.
Unscrew the valve cap from the valve
of the collapsible tire.
Take the valve extractor from the
vehicle tool kit (
page 381).
Unscrew the valve insert from the valve
and allow the air to escape.
Screw the valve insert back into the
valve.
Screw the valve cap back on the valve.
Pull the protective wrap provided with
the vehicle tool kit over the spare
wheel.
Store the spare wheel and the valve ex-
tractor in the storage compartment un-
derneath the trunk floor.
!
Make sure the spare wheel is dry when
storing it.
i
It may take a few minutes for the col-
lapsible tire to deflate completely.


384 Practical hints
Where will I find ...?
Pierce the protective wrap with
retaining screw3.
Secure the spare wheel by turning re-
taining screw3 clockwise.In case of a flat tire, you may temporarily
use the spare wheel with collapsible tire
when observing the following restrictions:

Do not exceed a vehicle speed of
50 mph (80 km/h).

Drive to the nearest tire repair facility
to have the flat tire repaired or
replaced as appropriate.

Do not operate vehicle with more than
one spare wheel mounted.
For more information, see “Rims and Tires”
(
page 429).
!
To prevent damage, always disengage
trunk floor handle from upper edge of
trunk and lower trunk floor before
closing the trunk.
Warning!G
The dimensions of the spare wheel with
collapsible tire are different from those of
the road wheels. As a result, the vehicle han-
dling characteristics change when driving
with a spare wheel mounted.
The spare wheel with collapsible tire should
only be used temporarily, and should be re-
placed with a regular road wheel as quickly
as possible.


404 Practical hints
Flat tire
Preparing the vehicle
Park the vehicle in a safe distance from
moving traffic on a hard, flat surface
when possible.
Turn on the hazard warning flasher
(
page 119).
Turn the steering wheel so that the
front wheels are in a straight ahead
position.
Set the parking brake (page 54).
Move the gear selector lever toP.
Turn off the engine (page 56).
Remove the SmartKey from the starter
switch.
Have any passenger exit the vehicle at
a safe distance from the roadway.
Mounting the spare wheel
Preparing the vehicle
Prepare the vehicle as described
(
page 404).
Take the collapsible tire, wheel wrench,
wheel bolts, jack, and electric air pump
out of the trunk (
page 380).
Warning!G
The dimensions of the spare wheel with col-
lapsible tire are different from those of the
road wheels. As a result, the vehicle han-
dling characteristics change when driving
with a spare wheel mounted. Adapt your
driving style accordingly.
The spare wheel is for temporary use only.
When driving with spare wheel mounted,
ensure proper tire pressure and do not ex-
ceed a vehicle speed of 50 mph (80 km/h).
Drive to the nearest Mercedes-Benz Center
as soon as possible to have the spare wheel
replaced with a regular road wheel.
Never operate the vehicle with more than
one spare wheel mounted.
Do not switch off the ESP
® when a spare
wheel is mounted.
i
Open doors only when conditions are
safe to do so.