2009 MERCEDES-BENZ SLR Owner's Manual

329 Practical hints
What to do if ...
Left display
Right display
Possible cause/consequence
Possible solution
Tire pressure
displayed after
driving for
a few minutes
The tire inflation pressure is being checked.

Drive the vehicle for a few minutes.
Tire Pressure
Monitor
Inoperative
The TPMS is malfunctioning

Have the TPMS checked by an
authorized Mercedes-Benz Center.
Tire Pressure
Monitor
Inoperative
No Wheel Sensors
There are wheels without appropriate wheel
sensors mounted (e.g. winter tires).

Have the TPMS checked by an autho-
rized Mercedes-Benz Center.

Have appropriate wheel sensors in-
stalled by an authorized
Mercedes-Benz Center.
Tire Pressure
Monitor
Wheel Sensor Missing
One or more sensors are defect (e.g. battery
is empty).
The respective tire is indicated by
---

instead of the tire inflation pressure in the
multifunction display.

Have the TPMS checked by an autho-
rized Mercedes-Benz Center.

Have appropriate wheel sensors in-
stalled by an authorized
Mercedes-Benz Center.

330 Practical hintsWhat to do if ...Left display
Right display
Possible cause/consequence
Possible solution
Tire Pressure
Monitor
Wheel Sensor Missing
One or more wheels without appropriate
wheel sensors mounted (e.g. spare wheel).
The respective tire is indicated by
---

instead of the tire inflation pressure in the
multifunction display.

Have the TPMS checked by an autho-
rized Mercedes-Benz Center.

Have appropriate wheel sensors in-
stalled by an authorized
Mercedes-Benz Center.
Tire Pressure
Monitor
Currently
Unavailable
The TPMS is unable to monitor the tire pres-
sure due to a nearby radio interference
source.
As soon as the causes for the malfunc-
tion are no longer present, the TPMS
automatically becomes active again
after a few minutes driving.
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. Continued
driving with a flat tire will cause excessive
heat build-up and possibly a fire.

331 Practical hints
What to do if ...
Left display
Right display
Possible cause/consequence
Possible solution
Transmission
Service
Required
The provided operating safety of the
automatic transmission is reduced.

Drive with added caution and have
the system checked at an authorized
Mercedes-Benz Center immediately.
Transmission
Shift To N
The transmission is in neutral although the
gear selector lever is not.

Move the gear selector lever to
neutral positionN.

332 Practical hintsWhat to do if ...Symbol messagesLeft display
Right display
Possible cause/
consequence
Possible solution
<
Airbrake
Malfunction
The Airbrake locking mecha-
nism is malfunctioning.

Contact an authorized Mercedes-Benz Center
immediately.
#
Battery/Alternator
Stop Car
The battery is malfunctioning.
The electro-hydraulic brake
system requires electrical
energy and therefore has only
limited operation. Considerably
greater brake pedal force is
required and the pedal travel is
longer. The stopping distance is
increased. If necessary, apply
full pressure to the brake pedal.

Stop the vehicle as soon as it is safe to do so. Adjust
driving to be consistent with reduced braking
responsiveness.

Do not drive any further.

Call Roadside Assistance.

Contact an authorized Mercedes-Benz Center
immediately.

333 Practical hints
What to do if ...
Left display
Right display
Possible cause/
consequence
Possible solution
#
The battery is no longer
charging. Possible causes:

alternator malfunctioning


broken poly-V-belt
Do not forget that the brake
system requires electrical
energy and may be operating
with restricted capability.
Considerably greater brake
pedal force is required and the
pedal travel is longer. The stop-
ping distance is increased. If
necessary, apply full pressure
to the brake pedal.

Stop the vehicle immediately in a safe location and
check the poly-V-belt.
If it is broken:
Do not continue to drive. Otherwise, the engine will
overheat due to an inoperative water pump which
may result in damage to the engine. Contact an
authorized Mercedes-Benz Center.
If it is in order:

Contact an authorized Mercedes-Benz Center imme-
diately. Adjust driving to be consistent with reduced
braking responsiveness.

Read and observe additional messages in the
multifunction display.
The starter battery has been
charged with a battery charger
or jump started.

Contact an authorized Mercedes-Benz Center.
There is a malfunction in the
electronic system.

Have the system checked at an authorized
Mercedes-Benz Center immediately.

334 Practical hintsWhat to do if ...Left display
Right display
Possible cause/
consequence
Possible solution
T
Reduced
Brake Effect
Depress brake
pedal fully.
The electro-hydraulic brake
system is in emergency opera-
tion mode. Considerably great-
er brake pedal force is required
and the pedal travel is longer.
The stopping distance is in-
creased. If necessary, apply full
pressure to the brake pedal.
The maximum speed is limited
to 55 mph (90 km/h).

Stop the vehicle in a safe location or as soon as it is safe
to do so.

Apply the parking brake (
page 55).

Do not drive any further.

Prevent the vehicle from rolling away by blocking the
wheels with wheel chocks or other sizeable objects.

Contact an authorized Mercedes-Benz Center.
or

Call for Roadside Assistance.
Warning!
G
Driving while this message is displayed can
result in an accident. Have your brake
system checked immediately.
If the electro-hydraulic brake system enters
its emergency operation mode, the driver
must apply significantly greater brake pedal
pressure and depress the pedal much fur-
ther than normal to obtain braking effect.
If necessary, apply full pressure to the brake
pedal. Brakes are only applied to the front
wheels. Stopping distance is increased!
If there is a malfunction in the
electro-hydraulic brake system, we recom-
mend that the vehicle be transported with
all wheels off the ground using flatbed or ap-
propriate wheel lift/dolly equipment.
A tow bar must be used if circumstances do
not permit the use of the recommended
towing methods and the vehicle requires
towing with all four wheels on the ground.
Towing the vehicle with all four wheels on
the ground is only permissible for distances
up to 30 miles (50 km) and at a speed not to
exceed 30 mph (50 km/h). For more infor-
mation, see “Towing the vehicle”
(page 373).

335 Practical hints
What to do if ...
Left display
Right display
Possible cause/
consequence
Possible solution
;
(USA only)
3
(Canada only)
Check
Brake Fluid Level
Risk of accident!
There is insufficient brake fluid
in the reservoir.

Stop the vehicle in a safe location or as soon as
it is safe to do so.

Do not drive any further.

Contact an authorized Mercedes-Benz Center.
Do not add brake fluid! This will not solve the
problem.
Warning!
G
Driving with the message
Check Brake
Fluid Level
displayed can result in an
accident. Have your brake system checked
immediately. Do not add brake fluid before
checking the brake system. Overfilling the
brake fluid reservoir can result in spilling
brake fluid on hot engine parts and the
brake fluid catching fire. You can be
seriously burned.
!
If you find that the brake fluid in the brake
fluid reservoir has fallen to the minimum mark or
below, have the brake system checked for brake
pad thickness and leaks.

336 Practical hintsWhat to do if ...Left display
Right display
Possible cause/
consequence
Possible solution
;
(USA only)
3
(Canada only)
Reduced
Brake Effect
Service
Required
The electro-hydraulic
brake system is in emer-
gency operation mode.
Considerably greater
brake pedal force is
required and the pedal
travel is longer. The stop-
ping distance is in-
creased. If necessary,
apply full pressure to the
brake pedal.

Stop the vehicle in a safe location or as soon as it is
safe to do so.

Apply the parking brake (
page 55).

Do not drive any further.

Prevent the vehicle from rolling away by blocking the
wheels with wheel chocks or other sizeable objects.

Contact an authorized Mercedes-Benz Center.
or

Call for Roadside Assistance.
Increased
Stopping Distance
Service
Required
Warning!
G
Driving while these messages are displayed
can result in an accident. Have your brake
system checked immediately.
If the electro-hydraulic brake system enters
its emergency operation mode, the driver
must apply significantly greater brake pedal
pressure and depress the pedal much fur-
ther than normal to obtain braking effect.
If necessary, apply full pressure to the brake
pedal. Brakes are only applied to the front
wheels. Stopping distance is increased!
If there is a malfunction in the
electro-hydraulic brake system, we recom-
mend that the vehicle be transported with
all wheels off the ground using flatbed or ap-
propriate wheel lift/dolly equipment.
A tow bar must be used if circumstances do
not permit the use of the recommended
towing methods and the vehicle requires
towing with all four wheels on the ground.
Towing the vehicle with all four wheels on
the ground is only permissible for distances
up to 30 miles (50 km) and at a speed not to
exceed 30 mph (50 km/h). For more infor-
mation, see “Towing the vehicle”
(page 373).