2006 MERCEDES-BENZ S65AMG key battery

392 Practical hintsReplacing SmartKey batteriesIf the batteries in the SmartKey or the
SmartKey with KEYLESS-GO* are dis-
charged, the vehicle can no longer be
locked or unlocked. It is recommended to
have the batteries replaced at an autho-
rized Mercedes-Benz Center.
Batteries contain materials that can harm
the environment if disposed of improperly.
Recycling of batteries is the preferred
method of disposal. Many states require
sellers of batteries to accept old batteries
for recycling.
SmartKey
Replacement batteries: Lithium, type
CR 2025 or equivalent.
Remove the mechanical key out of the
SmartKey (
page 388).1Mechanical key
2Slide
3Battery compartment

Insert mechanical key1 in the direc-
tion of arrow in side opening.

Using mechanical key1, push gray
slide 2 to unlatch battery compart-
ment 3.

Pull battery compartment3 out of the
housing in the direction of arrow.
Warning!
G
Batteries contain poisonous and corrosive
substances. Therefore keep the batteries
out of reach of children.
If a battery is swallowed, seek medical help
immediately.
iWhen inserting the batteries, make
sure they are clean and free of lint.iThe required replacement batteries are
available at any authorized
Mercedes-Benz Center.iWhen changing batteries, always re-
place both batteries.

393 Practical hints
Replacing SmartKey batteries
4Battery
5Contact spring
Remove the batteries4 in the direc-
tion of arrow.

Using a lint-free cloth, insert new
batteries4 under the contact
spring5 with the positive terminal (+)
side facing up.

Return battery compartment3
(page 392) into housing until it locks
into place.

Slide mechanical key1 (
page 388)
back into the SmartKey.

Check the operation of the SmartKey.
SmartKey with KEYLESS-GO*
Replacement battery: Lithium, type
CR 2025 or equivalent.
Remove the mechanical key out of the
SmartKey with KEYLESS-GO
(page 388).

Remove battery compartment3
(page 392) out of the housing.
1Battery
2Tilt battery up
3Mechanical key

Using mechanical key3, apply pres-
sure to position2.
Battery1 tilts up slightly.

Pull out battery1 in the direction of
arrow.

Using a lint-free cloth, insert new
battery1 with the plus (+) side facing
up.

Return battery compartment3
(page 392) into housing until it locks
into place.

Slide mechanical key1 (
page 388)
back into the SmartKey with
KEYLESS-GO.

Check the operation of KEYLESS-GO.

408 Practical hintsBattery
The battery is located on the right side of
the trunk under the battery cover.
1Battery cover 
Pull on the outer, right-hand side of
cover1 and remove it in the direction
of the arrow.
Warning!
G
Failure to follow these instructions can re-
sult in severe injury or death.
Never lean over batteries while connecting,
you might get injured.
Battery fluid contains sulfuric acid. Do not
allow this fluid to come in contact with eyes,
skin or clothing. In case it does, immediately
flush affected area with water and seek
medical help if necessary.
A battery will also produce hydrogen gas,
which is flammable and explosive. Keep
flames or sparks away from battery, avoid
improper connection of jumper cables,
smoking, etc.Warning!
G
Do not place metal objects on the battery as
this could result in a short circuit.
Use leak-proof battery only to avoid the risk
of acid burns in the event of an accident.
!Never loosen or detach battery termi-
nal clamps while the engine is running
or the SmartKey is in the starter switch.
Otherwise the alternator and other
electronic components could be se-
verely damaged.
Have the battery checked regularly by
an authorized Mercedes-Benz Center.
Refer to Maintenance Booklet for main-
tenance intervals or contact an autho-
rized Mercedes-Benz Center for further
information.Warning!
G
With a disconnected battery

you will no longer be able to turn the
SmartKey in the starter switch and
pressing the KEYLESS-GO* start/stop
button (
page 35) on the gear selector
lever will have no effect


the gear selector lever will remain
locked in positionP

414 Practical hintsTowing the vehicle
!
To be certain to avoid a possibility of
damage to the drivetrain, however, we
recommend the drive shaft be discon-
nected at the rear axle drive flange (ve-
hicles with 4MATIC: disconnected at
the front and rear axle drive flanges) for
any towing beyond a short tow to a
nearby garage.Warning!
G
If circumstances require towing the vehicle
with all wheels on the ground, always tow
with a tow bar if:

the engine will not run


there is a malfunction in the power sup-
ply or in the vehicle’s electrical system
as that will be necessary to adequately con-
trol the towed vehicle.
Prior to towing the vehicle with all wheels on
the ground, make sure the SmartKey is in
starter switch position2.
If the SmartKey is left in starter switch
position0 for an extended period of time, it
can no longer be turned in the switch. In this
case, the steering is locked. To unlock, re-
move SmartKey from starter switch and re-
insert.Warning!
G
With the engine not running, there is no
power assistance for the brake and steering
systems. In this case, it is important to keep
in mind that a considerably higher degree of
effort is necessary to brake and steer the ve-
hicle. Adapt your driving accordingly.iThe gear selector lever will remain
locked in positionP and the SmartKey
will not turn in the starter switch if the
battery is disconnected or discharged.
See information on the battery
(page 408) or on jump starting
(page 411).
iTo signal turns while being towed with
the hazard warning flasher in use, turn
SmartKey in starter switch to
position2 and activate the combina-
tion switch for the left or right turn sig-
nal in the usual manner – only the
selected turn signal will operate.
Upon canceling the turn signal, the haz-
ard warning flasher will operate again.

448 Technical termsProgram mode selector switch
Used to switch the automatic transmis-
sion between standard operationS and
comfort operationC.
S55 AMG and S65 AMG with steering
wheel gearshift control and manual
shift program: in addition toS andC
(see above), you can useM for manual
operation.
PSI
(P
ounds per s
quare i
nch)
(
page 324)
Recommended tire inflation pressure
(page 324)
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.Restraint systems
Seat belts, belt tensioners, air bags
and child restraint systems. As inde-
pendent systems, their protective func-
tions complement one another.
Rim
(
page 324)
RON
(Research 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 AN-
TI-KNOCK INDEX.
Shift lock
When the vehicle is parked, this lock
prevents the transmission selector le-
ver from being inadvertently moved out
of positionP without the SmartKey
turned and the brake pedal depressed.Sidewall
(
page 324)
SRS
(Supplemental R
estraint S
ystem)
Seat belts, emergency tensioning de-
vice and air bags. Though independent
systems, they are closely interfaced to
provide effective occupant protection.
Tele Aid System
(T
elematic A
larm I
dentification on
D
emand)
The Tele Aid system consists of three
types of response: automatic and man-
ual emergency, Roadside Assistance
and information. Tele Aid is initially ac-
tivated by completing a subscriber
agreement and placing an acquain-
tance call.
The Tele Aid system is operational pro-
vided that the vehicle’s battery is
charged, properly connected, not dam-
aged and cellular and GPS coverage is
available.

453 Index
Automatic headlamp mode 132
Automatic lighting control
Activating 137
Deactivating 137
Automatic locking when driving 112
Automatic shift program
Automatic transmission 179
Automatic transmission 173
Accelerator position 177
Automatic shift program 179
Emergency operation (Limp Home
Mode) 185
Fluid level 293
Gear ranges 178
Gear selector lever position 173, 175
Gear shifting malfunctions 185
Kickdown 177
Kickdown, manual shift program
S 55 AMG and S 65 AMG 185
Manual shift program S 55 AMG and
S 65 AMG 183
Manual shifting 180
One-touch gearshifting 180
Selector lever position 173
Starting the engine 46Steering wheel gearshift control
S 55 AMG and S 65 AMG 181
Transmission fluid 293
Auxiliary fuse box 417
B
BabySmart
TM
Air bag deactivation system 73
Compatible child seats 73, 443
Self-test 73
BabySmart
TM air bag deactivation
system 443
Backrest supports
Lumbar region 123
Shoulder region 123
Backup lamps 395, 400
Bulbs 395
Bar 323
BAS 80, 444
Batteries, SmartKey
Check lamp 95
Checking 95
Replacing 392
Batteries, SmartKey with KEYLESS-GO*
Checking 101
Battery discharged
Jump starting 411Battery, SmartKey with KEYLESS-GO*
Check lamp 101
Replacing 393
Battery, vehicle 295, 408
Charging 409
Disconnecting 409
Reconnecting 410
Reinstalling 409
Removing 409
Bead 323
Bi-Xenon headlamps 444
Block heater (Canada only) 328
Blocking
Rear window operation 77
Brake assist system (BAS) 444
Brake fluid 285, 437
Brake lamp bulbs 395
Brake lamp, high mounted 395
Brake pads
Message in display 361
Brakes 274
High-performance brake system
(S 65 AMG only) 275
Warning lamp 341
Break-in period 272

454 IndexBulbs, replacing 394
Additional turn signals 395
Backup lamps 395
Brake lamps 395
Fog lamps 395
Front lamps 395
High beam 395
High mounted brake lamp 395
License plate lamps 395, 400
Low beam 395
Parking and standing lamps 395
Parking lamps 395, 399
Rear fog lamp 395, 400
Rear fog lamps 399
Side marker lamps 395, 399
Standing lamps 395, 399
Tail lamp assemblies 395
Tail lamp unit 400
Turn signal lamps 395
C
CAC (Customer Assistance Center) 444
Call priority
Tele Aid 260Calling up
Distronic* settings 156
Maintenance service indicator 330
Range (distance to empty) 158
CAN system 444
Canceling
Cruise control 216
Cargo tie-down hooks 240
Catalytic converter 282
CD changer* 151
CD mode 151
CD operation
Selecting tracks 150
Center console 27
Air bag off indicator lamp 348
Front passenger front air bag off indica-
tor lamp 348
Lighter 250
Centigrade (°C)
Setting temperature units 163
Central locking
Automatic 112
From inside 113
Switch 113Switching on/off (control
system) 168
Unlocking from inside 113
Change of address or ownership 12
Changing
CDs 151
SmartKey setting 169
Vehicle level 231, 234
Charcoal filter 200
Activating 200
Deactivating 200
Charging
Vehicle battery 409
Checking
Brake fluid 285
Coolant level 294
Oil level 286, 288
Oil level via control system 289
Tire inflate pressure 286
Vehicle lighting 286
Child safety 71
Air bags 62
Infant and child restraint systems 71
LATCH child seat anchors 75
Cigarette lighter 250

462 IndexK
Key see SmartKey 57, 58
Key, mechanical 388
Key, SmartKey
Checking the batteries 95
Locking 58
Key-dependency memory
Settings 169
KEYLESS-GO* 446
Activating ignition with 36
Locking 58
Locking the vehicle 101
Loss of SmartKey with
KEYLESS-GO 102
Messages in display 368
Starting the engine 47
Turning off engine 57
Kickdown 177, 446
Kilometers/miles in speedometer 163
Kilopascal 324
Km/h or mph in speedometer 163L
Lamp bulbs, exterior 394
Lamps, exterior
Front 395
Light sensor 370
Messages in display 371
Rear 395
Lamps, indicator and warning
ABS 340
Air bag off 65
Battery (SmartKey with
KEYLESS-GO*) 100
Battery (SmartKey) 94
Brakes 341
Coolant 362
Distronic* 220
Engine diagnostics 342, 343
Engine malfunction indicator
lamp 342, 343
ESP
®
344, 345
Front passenger front air bag off 348Fuel reserve 343
Instrument cluster 340–347
Seat belts telltale 345
Service indicator 329
SRS 61
Language
Multifunction display 164
Setting 164
LATCH child seat anchors 75
Layout of poly-V-belt drive 423
Leather upholstery
Cleaning 338
Lever
For cruise control 222
License plate lamps
Replacing bulbs 395, 400
Light alloy wheels
Cleaning 337
Light sensor 370
Lighter
Center console 250