2007 MERCEDES-BENZ SLR steering

280 Operation
Tires and wheels
Tire type code
The code4 (
page 279) may, at the
option of the manufacturer, be used as a
descriptive code for identifying significant
characteristics of the tire.
Date of manufacture
The date of manufacture5 (
page 279)
identifies the week and year of
manufacture.
The first two figures identify the week,
starting with “01” to represent the first full
week of the calendar year. The second two
figures represent the year.
For example, “3202” represents the 32nd
week of 2002.
Maximum tire load
1Maximum tire load rating
The maximum tire load is the maximum
weight the tires are designed to support.For more information on tire load rating
(
page 275).
For information on calculating total and
cargo load capacities (
page 263).
iFor illustration purposes only. Actual data
on tires are specific to each vehicle and may vary
from data shown in above illustration.
Warning!G
Do not overload the tires by exceeding the
specified load limit or vehicle capacity
weight as indicated on the placard located
on the driver’s door B-pillar. Overloading the
tires can overheat them, possibly causing a
blowout. Overloading the tires can also
result in handling or steering problems, or
brake failure.

284 Operation
Tires and wheels
Tire and loading terminology
Accessory weight
The combined weight (in excess of those
standard items which may be replaced) of
automatic transmission, power steering,
power brakes, power windows, power
seats, radio, and heater, to the extent that
these items are available as
factory-installed equipment (whether
installed or not).
Air pressure
The amount of air inside the tire pressing
outward on each square inch of the tire.
Air pressure is expressed in pounds per
square inch (psi), or kilopascal (kPa) or
bars.
Aspect ratio
Dimensional relationship between tire
section height and section width
expressed in percentage.Bar
Another metric unit for air pressure. There
are 14.5038 pounds per square inch (psi)
to 1 bar; there are 100 kilopascals (kPa)
to 1 bar.
Bead
The tire bead contains steel wires wrapped
by steel cords that hold the tire onto the
rim.
Cold tire inflation pressure
Tire inflation pressure when your vehicle
has been sitting for at least three hours or
driven no more than one mile (1.6 km).
Curb weight
The weight of a motor vehicle with stan-
dard equipment including the maximum
capacity of fuel, oil, and coolant, and, if so
equipped, air conditioning and additional
optional equipment, but without passen-
gers and cargo.DOT (Department of Transportation)
A tire branding symbol which denotes the
tire meets requirements of the
U.S. Department of Transportation.
GAWR (G
ross Axle Weight Rating)
The GAWR is the maximum permissible
axle weight. The gross vehicle weight on
each axle must never exceed the GAWR for
the front and rear axle indicated on the
certification label located on the driver’s
door A-pillar.
GVW (G
ross Vehicle Weight)
The GVW comprises the weight of the
vehicle including fuel, tools, spare wheel,
installed accessories, passengers and
cargo and, if applicable, trailer tongue
load. The GVW must never exceed the
GVWR indicated on the certification label
located on the driver’s door A-pillar.

293 Operation
Maintenance
Maintenance service term exceeded
If you have exceeded the suggested main-
tenance service term, you will see the fol-
lowing message in the right multifunction
display:
Service exceeded by .. days
Service exceeded by .. miles
Any authorized Mercedes-Benz Center will
reset the maintenance service indicator
following a completed maintenance
service.Calling up the maintenance service due
date
Switch on the ignition (page 40).
Press buttonè orÿ on the
multifunction steering wheel repeated-
ly until the standard display appears in
the multifunction display (
page 117).
Press button k or j on the
multifunction steering wheel until the
maintenance service indicator service
symbol 9 appears in the left multi-
function display and the maintenance
service deadline appears in the right
multifunction display.
iIf the vehicle is not be used for a longer pe-
riod of time, do not disconnect the consumer
battery. Instead, maintain the condition of the
battery by using the battery charger approved by
Mercedes-Benz for use on the SLR and supplied
with the car (
page 369). This charger automat-
ically controls the charge rate, and can be left
connected to the car for long periods without
damage to the battery.
If the battery supplying the vehicle’s electrical
consumers is disconnected, the days of discon-
nection will not be included in the count shown
by the maintenance service indicator. To arrive
at the true maintenance service deadline, you
will need to subtract these days from the days
shown in the maintenance service indicator.
Do not confuse the maintenance service indica-
tor with the engine oil level indicator:.

302 Practical hints
What to do if ...
ProblemPossible cause/consequenceSuggested solutions
-The yellow ABS indicator
lamp comes on while the
engine is running.Risk of accident!
The ABS has detected a malfunction and
has switched off. The BAS and the ESP
®
are also switched off.
If the ABS control unit is malfunctioning,
other systems such as the automatic
transmission may also be malfunctioning.
The electro-hydraulic brake system is still
functioning normally but without ABS
available.
Continue driving with added caution. Wheels
may lock during hard braking, reducing
steering capability.
Have the system checked at an authorized
Mercedes-Benz Center immediately.
Failure to follow these instructions increases
the risk of an accident.
Read and observe messages in the
multifunction display (
page 314).
The charging voltage has fallen below
10 volts. The ABS has switched off.
The battery may not be charged
sufficiently.When the voltage is above this value again, the
ABS is operational again and the ABS indicator
lamp should go out.
If the ABS indicator lamp does not go out:
Have the generator (alternator) and the
battery checked.

311 Practical hints
What to do if ...
ProblemPossible cause/consequenceSuggested solution
HLow tire pressure telltale for the
TPMS illuminates continuously.The TPMS detects a loss of pressure in at
least one tire.Carefully bring the vehicle to a halt,
avoiding abrupt steering and braking
maneuvers. Observe the traffic
situation around you.
Read and observe messages in the
multifunction display.
The low tire pressure telltale goes out
once the TPMS has been reactivated after
the tire inflation pressure has been
corrected.
Warning!G
Each tire, including the spare (if provided),
should be checked monthly when cold and
inflated to the inflation pressure recom-
mended by the vehicle manufacturer on the
vehicle placard or the tire inflation pressure
label. (If your vehicle has tires of a different
size than the size indicated on the vehicle
placard or the tire inflation pressure label,
you should determine the proper tire infla-
tion pressure for those tires).
As an added safety feature, your vehicle has
been equipped with a tire pressure monitor-
ing system (TPMS) that illuminates a low tire
pressure telltale when one or more of your
tires is significantly underinflated. Accord-
ingly, when the low tire pressure telltale illu-
minates, you should stop and check your
tires as soon as possible, and inflate them to
the proper pressure. Driving on a significant-
ly underinflated tire causes the tire to over-
heat and can lead to tire failure.Underinflation also reduces fuel efficiency
and tire tread life, and may affect the vehi-
cle’s handling and stopping ability. Please
note that the TPMS is not a substitute for
proper tire maintenance, and it is the driv-
er’s responsibility to maintain correct tire
pressure, even if underinflation has not
reached the level to trigger illumination of
the TPMS low tire pressure telltale.

314 Practical hints
What to do if ...
Vehicle status messages in the
multifunction display
Warning and malfunction messages
appear in the multifunction display located
in the instrument cluster.
Certain warning and malfunction messag-
es are accompanied by an audible signal.
Address these messages accordingly and
follow the additional instructions given in
this Operator’s Manual.
Selecting the vehicle status message
memory menu in the control system
(
page 128) displays both cleared and
uncleared messages.
High-priority messages appear in the
multifunction display in red color.Certain messages of high priority cannot
be cleared from the multifunction display
using the reset button (
page 29) or
button j, k, ÿ, or è on the
multifunction steering wheel.
Other messages of high priority and
messages of less immediate priority can
be cleared from the multifunction display
using the reset button or button j,
k, ÿ, or è on the multifunction
steering wheel. They are then stored in the
vehicle status message memory
(
page 128). Remember that clearing a
message will only make the message
disappear. Clearing a message will not
correct the condition that caused the
message to appear.
Warning!G
All categories of messages contain
important information which should be
taken note of and, where a malfunction is
indicated, addressed as soon as possible at
an authorized Mercedes-Benz Center.
Failure to repair condition noted may cause
damage not covered by the Mercedes-Benz
Limited Warranty, or result in property
damage or personal injury.

316 Practical hints
What to do if ...
Text messages
Left displayRight displayPossible cause/consequencePossible solution
ABSABS, ESP
unavailable
See
Oper. ManualRisk of accident!
The ABS and ESP
® are not available
due to a malfunction. The BAS is also
deactivated.
The system’s self-diagnosis may not
be completed yet.
The electro-hydraulic brake system
is still functioning normally but with-
out the ABS, the ESP
®, and the BAS
available.
Drive a short distance with added caution at
a vehicle speed of above 12 mph
(20 km/h).
When the message disappears, the ABS, the
ESP
®, and the BAS are available again.
If the message does not disappear:
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.

317 Practical hints
What to do if ...
Left displayRight displayPossible cause/consequencePossible solution
ABSABS, ESP
inoperative
See
Oper. ManualRisk of accident!
The ABS and ESP
® ha ve s witc he d off
due to a malfunction.
The BAS is also deactivated.
The electro-hydraulic brake system
is still functioning normally but with-
out the ABS, the ESP
®, and the BAS
available.
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.
Convenience
functionstemporarily
unavailableThe battery for electrical consumers
has insufficient voltage and can no
longer supply the convenience func-
tions such rear window heating.As soon as the on-board voltage is sufficient,
you will see the following message in the multi-
function display:
Convenience functions
available again
. The electrical consumers are
switched on again.
Cruise control––– mph
(USA only)
––– km/h
(Canada only)
You have attempted to resume a
stored speed, but nothing is stored.Store a speed (page 204).
You have attempted to set a speed
below 20 mph (30 km/h).Accelerate to a speed exceeding
20 mph (30 km/h) and set the speed
(
page 204).
The ESP® is switched off.Switch on the ESP® (page 86).
Exceptions: (
page 85).