2006 MERCEDES-BENZ SLR alternator

315 Practical hints
What to do if ...
Symbol messagesLeft display
Right display
Possible cause/
consequence
Possible solution
<
Airbrake malfunc
The Airbrake locking mecha-
nism is malfunctioning.

Notify an authorized Mercedes-Benz Center
immediately.
#
Battery/
Alternator
Stop vehicle
The battery or the alternator is
malfunctioning.
The electrohydraulic brake sys-
tem requires electrical energy
and therefore has only limited
operation. Considerably great-
er brake pedal force is required
and the pedal travel is longer.
The stopping distance is in-
creased.

Stop the vehicle as soon as it is safe to do so. Adjust driv-
ing to be consistent with reduced braking responsive-
ness.

Notify an authorized Mercedes-Benz Center immediate-
ly.

Read and observe messages in the multifunction display.
Failure to follow these instructions increases the risk of an
accident.
Convenience func-
tions
Temporarily
Unavailable
The consumer battery has in-
sufficient voltage and can no
longer supply the convenience
functions such as power win-
dows.
The electrical consumers will come back online as soon as
on-board voltage is sufficient.

316 Practical hintsWhat to do if ...Left display
Right display
Possible cause/
consequence
Possible solution
#
Visit
workshop
The battery is no longer charg-
ing. Possible causes:

alternator malfunctioning


broken poly-V-belt
Do not forget that the brake
system requires electrical ener-
gy and may be operating with
restricted capability. Consider-
ably greater brake pedal force
is required and the pedal travel
is longer. The stopping distance
is increased.

Stop your 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. Notify an
authorized Mercedes-Benz Center.
If it is in order:

Drive immediately to the nearest authorized
Mercedes-Benz Center. Adjust driving to be consis-
tent with reduced braking responsiveness.

Read and observe messages in the multifunction display.
There is a malfunction in the
electronic system.

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

369 Technical data
Layout of poly-V-belt drive
Layout of poly-V-belt drive
The SLR has two poly-V-belts (belt one
shown in purple/belt two shown in black).1Idler pulley
2Automatic belt tensioner
3Power steering pump
4Air conditioning compressor
5Idler pulley
6Crankshaft
7Coolant pump
8Generator (alternator)
9Idler pulley
aAutomatic belt tensioner
bSupercharger

374 Technical dataElectrical systemGenerator (alternator)
14 V/150 A
Starter motor
12 V/1.7 kW
BatteryStarter battery
12 V/35 Ah
Battery for electrical consumers
12 V/70 Ah
Spark plugs
NGK ILFR6A
Electrode gap
0.031 in (0.8 mm)
Tightening torque
18 – 22 lb-ft (25 – 30 Nm)

388 Technical termsOverspeed range
Engine speeds within the red marking
on the tachometer dial. Avoid this en-
gine speed range, as it may result in se-
rious engine damage that is not
covered by the Mercedes-Benz Limited
Warranty.
Poly-V-belt drive
Drives engine-components (alternator,
AC compressor, etc.) from the engine.
Power train
Collective term designating all compo-
nents used to generate and transmit
motive power to the drive axles, includ-
ing


engine


clutch/torque converter


transmission


transfer case


drive shaft


differential


axle shafts/axlesProduction options weight
(
page 282)
Program mode selector switch
Used to switch the automatic transmis-
sion between sport operation (S), com-
fort operation (C) and manual
operation (MAN).
PSI
(Pounds per s
quare i
nch)
(
page 283)
Recommended tire inflation pressure
(page 283)
REST
(Residual Engine Heat Utilization)
Feature that uses the engine heat
stored in the coolant to heat the vehi-
cle interior for a short time after the en-
gine has been turned off.
Rim
(page 283)RON
(R
esearch O
ctane N
umber)
The Research Octane Number for gaso-
line as determined by a standardized
method. It is an indication of a gaso-
line's ability to resist undesired detona-
tion (knocking). The average of both
the MON (Motor Octane Number) and
RON (Research Octane Number) is
posted at the pump, also known as
ANTI-KNOCK INDEX.
Electrohydraulic brake system
Electronically controlled hydraulic
braking system for increased braking
safety and comfort.
Shift lock
When the vehicle is parked, this lock
prevents the gear selector lever from
being inadvertently moved out of posi-
tion P without SmartKey turned and
brake pedal depressed.