2007 MERCEDES-BENZ SLR CLASS brake

331 Practical hints
What to do if ...
Left displayRight displayPossible cause/
consequencePossible solution
;(USA only)
3(Canada only)
Reduced
brake effect
Visit
workshopThe 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 sizable objects.
Contact an authorized Mercedes-Benz Center.
or
Call for Roadside Assistance.
Increased
stopping distance
Visit
workshop
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 370).

332 Practical hints
What to do if ...
Left displayRight displayPossible cause/
consequencePossible solution
;(USA only)
3(Canada only)
Reduced
brake effect
Start engineThe battery has insufficient
voltage and cannot supply
sufficient power to the
electro-hydraulic brake system.
Considerably greater brake
pedal force is required and the
pedal travel is longer. The
stopping distance is increased.Start the engine.
As soon as the engine is running, the message
disappears.
Increased
stopping distance
Start engine
Warning!G
Inhalation of exhaust gas is hazardous to
your health. All exhaust gas contains carbon
monoxide (CO), and inhaling it can cause
unconsciousness and possible death.
Do not run the engine in confined areas
(such as a garage) which are not properly
ventilated.

333 Practical hints
What to do if ...
Left displayRight displayPossible cause/
consequencePossible solution
;(USA only)
3(Canada only)
Brakes overheated
Drive on, but with
even greater careThe brake system is overheated
due to an excessive load on the
brakes.Relieve the load on the brake system.
Drive more smoothly and think ahead to avoid
unnecessary braking.
Use the engine’s braking power more frequent-
ly. Shift into a lower gear (
page 174).
Cautiously continue driving so that the air
stream will cool down the brakes.
The message disappears after driving carefully
for a few minutes.
Warning!G
Overheating of the brake system will short-
en the service life of the brake disks. The
brake disks could fail. Have the brake disks
checked at an authorized Mercedes-Benz
Center.

334 Practical hints
What to do if ...
Left displayRight displayPossible cause/
consequencePossible solution
;(USA only)
3(Canada only)
Service brake
Visit
workshopThere are malfunctions, but the
electro-hydraulic brake system
is operating normally.Contact an authorized Mercedes-Benz Center
immediately.
Release
parking brakeYou are driving with the parking
brake set.Release the parking brake (page 49).
2 Brake wearThe brake pads have reached
their wear limit.Have the brake pads replaced as soon as pos-
sible.
!Brake pad thickness must be visually
checked by a qualified technician at the intervals
specified in the Maintenance Booklet.
Excessive load on the brake system causes in-
creased wear of brake pads and brake disks. If
the brake pads have to be replaced multiple
times within one maintenance service interval,
the brake disks must be checked. Observe the
information given in the Maintenance Booklet
and contact an authorized Mercedes-Benz
Center.Warning!G
Have brake pad replacement and other work
on the electro-hydraulic brake system car-
ried out by qualified technicians only. Con-
tact your Mercedes-Benz Center for further
information. The electro-hydraulic brake
system must be deactivated prior to working
on the system. High pressure is intermit-
tently built up in the system as part of its
automatic self-test. In addition, the system
is automatically activated when the vehicle
is unlocked by remote control, when the
driver or passenger door is opened, when
the SmartKey in the starter switch is turned
to position1, when the brake pedal is
depressed or when the parking brake is
released.
Failure to deactivate the system prior to
maintenance will cause brake pistons to
extend and brake fluid to leak, which may
result in injuries (contusions and acid
burns), see “Electro-hydraulic brake sys-
tem” (
page 86).

338 Practical hints
What to do if ...
Left displayRight displayPossible cause/
consequencePossible solution
•Differential
overheatedThe differential oil is too hot.Stop your vehicle immediately in a safe location.
Do not drive any further.
Apply the parking brake (page 55).
Wait until the instrument cluster display has cleared.
Otherwise you could damage the rear differential.
!The differential warning should not be
ignored. Extended driving with the symbol
displayed could result in serious rear differential
damage that is not covered by the
Mercedes-Benz Limited Warranty.

341 Practical hints
What to do if ...
Left displayRight displayPossible cause/
consequencePossible solution
.3rd brake lampThe high mounted brake lamp
is malfunctioning.Contact an authorized Mercedes-Benz Center as soon as
possible.
Brake lamp
left
Auxiliary bulb onThe left brake lamp is malfunc-
tioning. This message will only
appear if a critical number of
LEDs have blown.Contact an authorized Mercedes-Benz Center as soon as
possible.
Brake lamp
right
Auxiliary bulb onThe right brake lamp is mal-
functioning. This message will
only appear if a critical number
of LEDs have blown.Contact an authorized Mercedes-Benz Center as soon as
possible.
Front foglamp
leftThe left front fog lamp is
malfunctioning.Contact an authorized Mercedes-Benz Center as soon as
possible.
Front foglamp
rightThe right front fog lamp is
malfunctioning.Contact an authorized Mercedes-Benz Center as soon as
possible.
Rear foglamp
leftThe left rear fog lamp is
malfunctioning. Contact an authorized Mercedes-Benz Center as soon as
possible.
High beam
leftThe left high beam lamp is
malfunctioning.Contact an authorized Mercedes-Benz Center as soon as
possible.
High beam
rightThe right high beam lamp is
malfunctioning.Contact an authorized Mercedes-Benz Center as soon as
possible.

346 Practical hints
What to do if ...
Left displayRight displayPossible cause/
consequencePossible solution
HTire pressure
Caution
Tire defectOne or more tires is deflating.Carefully bring the vehicle to a halt, avoiding abrupt
steering and braking maneuvers. Observe the traffic
situation around you.
Temporarily repair tire using TIREFIT (page 362) or
contact Roadside Assistance. If tire cannot be tempo-
rarily repaired using TIREFIT, contact Roadside
Assistance.
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.
Continued driving with a flat tire will cause
excessive heat build-up and possibly a fire.
Warning!G
Have worn or damaged tires replaced in
pairs (front pair or rear pair) an make sure
the tires rotate in the direction specified
(
page 261). Otherwise, the driving
stability of the vehicle will be adversely
affected, especially when driving at high
speeds.

347 Practical hints
What to do if ...
Left displayRight displayPossible cause/
consequencePossible solution
HTire pressure
Check tiresThe tire inflation
pressure in one or
more tires is already
below the minimum
value.
The tire inflation
pressure in one or
more tires is low.Carefully bring the vehicle to a halt, avoiding abrupt steering and
braking maneuvers. Observe the traffic situation around you.
Check the tires. If no damage visible, check and correct tire
inflation pressure as required.
Temporarily repair tire using TIREFIT (page 362) or contact
Roadside Assistance. If tire cannot be temporarily repaired using
TIREFIT, contact Roadside Assistance.
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.
Continued driving with a flat tire will cause
excessive heat build-up and possibly a fire.
Warning!G
Have worn or damaged tires replaced in
pairs (front pair or rear pair) an make sure
the tires rotate in the direction specified
(
page 261). Otherwise, the driving
stability of the vehicle will be adversely
affected, especially when driving at high
speeds.