2007 MERCEDES-BENZ R320CDI key battery

483 Practical hints
Replacing SmartKey batteries
Replacing SmartKey batteries
If the batteries in the SmartKey or the
SmartKey with KEYLESS-GO* are
discharged, the vehicle can no longer be
locked or unlocked. It is recommended to
have the batteries replaced at an autho-
rized Mercedes-Benz Light Truck 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.Replacement batteries: Lithium, type
CR 2025 or equivalent.
Remove the mechanical key from the
SmartKey (
page 478).
1Mechanical key
2Battery compartment
Insert mechanical key 1 into opening.
Press mechanical key 1 in direction of
arrow.
The battery compartment is unlatched.
Pull battery compartment 2 out of the
SmartKey housing.
3Batteries
4Contact springs
Pull out batteries3.
Using a line-free cloth, insert new bat-
teries 3 under contact springs 4 with
the positive terminal (+) side facing up.
Return battery compartment 2 into
housing until it locks into place.
Slide mechanical key 1 back into
SmartKey.
Check the operation of the SmartKey
or SmartKey with KEYLESS-GO*.
Warning!G
Keep the batteries out of reach of children.
If a battery is swallowed, seek medical help
immediately.
iWhen replacing batteries, make sure they
are clean and free of lint.
iWhen replacing batteries, always replace
both batteries. The required replacement
batteries are available at any Mercedes-Benz
Light Truck Center.

508 Practical hints
Battery
Disconnecting, removing, reinstalling
and reconnecting the battery
Step 1 (Disconnecting)
Set the automatic transmission to
positionP (
page 199).
Firmly depress the parking brake
(
page 66).
Turn off the engine (page 67).
Leave the ignition switched on
(
page 39).
!Never loosen or detach battery terminal
clamps while the engine is running or the
SmartKey is in the starter switch. Otherwise the
alternator and other electronic components
could be severely damaged.
Have the battery checked regularly by an autho-
rized Mercedes-Benz Light Truck Center.
Contact your authorized Mercedes-Benz Light
Truck Center for further information.
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.
Warning!G
Disconnecting, removing, reinstalling and
reconnecting the battery is a complicated
and technically demanding procedure that
a l s o r e q u i r e s s a f e t y p r e c a u t i o n s t o a v o i d t h e
risk of injury. We strongly recommend that it
be performed by a qualified technician or an
authorized Mercedes-Benz Light Truck
Center only. Please read the instructions
fully before beginning operation and only
undertake it if you feel fully capable of
performing all of the tasks involved as
described in these instructions. Observe all
safety instructions and precautions when
handling automotive batteries
(
page 506). Performing the tasks involved
incorrectly can cause damage to the vehicle
and impair the operating safety of the
vehicle, and/or cause severe injury to you
or others.
iWith a disconnected battery you will no long-
er be able to turn the SmartKey in the starter
switch and pressing the KEYLESS-GO*
start/stop button will have no effect.
iIf your battery is discharged, the vehicle
must be jump started (
page 514) using the
jump start contacts in the engine compartment,
or an accessory battery charge unit* approved
by Mercedes-Benz must be connected using the
jump start contacts in the engine compartment
(see separate instructions for the accessory
battery charge unit*) before any of the following
steps can be performed. If the battery cannot be
jumped or charged, please contact an autho-
rized Mercedes-Benz Light Truck Center.

509 Practical hints
Battery
Switch off all electrical consumers.
Read and observe safety instructions
and precautions (
page 506).
Open the front passenger door.
Move the front passenger seat to the
most rearward position (
page 45).Step 2 (Disconnecting)
1Seat rail cover, front right
2Seat rail cover, front left
Pull off right seat rail cover 1 in direc-
tion of arrow.
Pull left seat rail cover 2 in direction
of arrow as far as it will go.
Left seat rail cover 2 cannot be re-
moved.3Battery cover mounting nuts
Using a 6 mm T-handle hex key (not
supplied with vehicle) with a minimum
shaft length of 12 in (30 cm), unfasten
and remove battery cover mounting
nuts 3 located at the floor carpet per-
foration.
Move the front passenger seat to the
most forward position (
page 45).
iIf the vehicle battery is discharged and you
had the vehicle jump started:

Leave the engine running.

Complete step 1, starting with switching off
all electrical consumers.

Continue with step 2.

When the font passenger seat is in the most
forward position, turn off the engine.
iOpen doors only when conditions are safe to
do so.


510 Practical hints
Battery
Switch off the ignition (page 40).
Remove the SmartKey from the starter
switch.
Vehicles with KEYLESS-GO*:
Make sure the vehicle’s on-board
electronics have status 0.
After turning off the engine with the
KEYLESS-GO start/stop button,
with the driver’s door closed, the
starter switch is in position1.
With the driver’s door opened, the
starter switch is set to position0,
same as SmartKey removed from
starter switch (
page 41).Step 3 (Disconnecting)
4Seat rail, rear
5Seat rail cover, rear
Pull seat rail cover 5 away from seat
rail 4 on both sides as indicated by
arrows.
Pull off seat rail cover 5 to the rear as
indicated by arrow.Step 4 (Disconnecting)
6Floor carpet
Pull back and fold floor carpet6 in
direction of the arrow.
iIf the vehicle battery is discharged and you
had the vehicle jump started, turn off the engine.
iTo release the floor carpet perforations (see
dotted line in above illustration), you will have to
apply somewhat greater force when pulling the
floor carpet back.


512 Practical hints
Battery
Step 8 (Disconnecting)
fPositive terminal with cover
gNegative terminal
Disconnect battery negative lead from
negative terminal g.
Make sure the negative lead does not
come into contact with the positive
lead.
Remove the cover from positive
terminal f.
Disconnect battery positive lead from
positive terminal f.Step 9 (Removing)
Take out battery.
Step 10 (Reinstalling)
Carry out step 9 (page 512).
Battery, shown removed for illustration
bBattery ventilation hose
hVent plug
Carry out step 11 to reconnect the
battery (
page 512).
Carry out steps 7 through 1 in reverse
order to complete reinstall the battery,
(
page 511) to (page 508).
Step 11 (Reconnecting)
If the battery has been removed, carry
out step 9 (
page 512) before starting
the connecting procedure.
Open the driver’s door.
Make sure the SmartKey is removed
from the starter switch.
Vehicles with KEYLESS-GO*:
Make sure the vehicle’s on-board
electronics have status 0.
With the driver’s door opened, the
vehicle’s on-board electronics
have status 0, same as SmartKey
removed from the starter
switch (
page 41).!The battery, battery ventilation hoseb,
and vent plug h must always be securely
installed when the vehicle is in operation.

518 Practical hints
Towing the vehicle
Installing towing eye bolt
Depending on whether you are towing a
vehicle or you are being towed, the towing
eye bolt can be screwed into threaded
holes which are located behind covers on
the right-hand side of each bumper.
Example illustration R 500
1Towing eye cover
Example illustration R 500
1Towing eye cover
!Towing of the vehicle should only be done
using the towing eye. Never attach tow cable,
tow rope or tow rod to vehicle chassis, frame or
suspension parts.
iWhen towing the vehicle with all wheels on
the ground, note the following:
With the automatic central locking activated and
the ignition in position2 (
page 39), the vehicle
doors lock if the left front wheel is turning at a
speed of approx. 9 mph (15 km / h) or above.
To prevent the vehicle doors from locking,
deactivate the automatic central locking
(
page 130).
iTo signal turns while being towed with
hazard warning flasher in use, set the starter
switch to position2 and activate combination
switch for left or right turn signal in usual manner
– only the selected turn signal will operate.
Upon canceling the turn signal, the hazard warn-
ing flasher will operate again.
iIf the battery is disconnected or discharged,
the automatic transmission will remain locked in
positionP and the SmartKey will not turn in the
starter switch. For more information, see “Bat-
tery” (
page 506) and “Jump starting”
(
page 514).
Warning!G
In order to avoid possible serious burns or
injury, use extreme caution when removing
the cover, because the rear exhaust pipe is
extremely hot.

548 Index
Automatic climate control (3-zone)* 232
Air conditioning, Cooling 243
Air conditioning refrigerant 540
Air distribution 238
Air recirculation mode 240
Air vents, Front 232, 238
Air vents, Rear 245, 249
Air volume 239
Control panel, Front 234
Control panel, Rear 245
Deactivating system 236
Defogging 240
Defrosting 239
Maximum cooling, MAX COOL 240
Rear passenger compartment 245
Residual heat utilization (REST) 244
Automatic headlamp mode 147
Automatic lighting control, Interior
lighting 154
Automatic locking when driving 130
Automatic shift program 206Automatic transmission 197
Accelerator position 203
Automatic shift program 206
Emergency operation
(limp-home mode) 211
Gear ranges 205
Gear selector lever 54, 197
Gear shifting malfunctions 211
Hill start assist system 204
Kickdown 203
Kickdown, manual shift program
(R 63 AMG only) 211
Manual shift program
(R 63 AMG only) 209
Program mode selector switch 206
Shifting procedure 200
Starting the engine 54
Steering wheel gearshift control 207
Transmission fluid level 370
Transmission positions 201
Automatic transmission fluid see ATF
AUX-socket 311B
Backrest
Seat 44
Seat, Lumbar support 136
Seat, Multicontour* 136
Backup lamps
Messages in the multifunction
display 463–468
Replacing bulbs 484
Bar 401
BAS 102
Lamps in instrument cluster 420
Messages in the multifunction
display 435
Batteries, SmartKey
Check lamp 112, 116
Checking battery condition 115, 120
Battery, Vehicle 506
Charging 513
Disconnecting and connecting 508
Jump starting 514
Removing and installing 508
Bead 401

556 Index
I
Identification label see Labels
Identification labels
Certification label 527
Ignition 40, 54, 67
Immobilizer 107
Indicator lamps see Lamps, Indicator and
warning
Infant and child restraint systems see
Children in the vehicle
Inflation pressure see Tires, Inflation
pressure
Information button see Tele Aid*
Infrared reflecting windshield* 344
Inside door handle 122
Instrument cluster 26, 156
Illumination brightness 157
Lamps 420
Messages in the multifunction
display 433–471
Multifunction display 159
Selecting language 179Instrument lighting see Instrument cluster,
Illumination brightness
Instrument panel see Instrument cluster
Instruments and controls see Cockpit
Interior lighting 153
Delayed switch-off 186
Interior rear view mirror 48
Antiglare position 212
Auto-dimming* 213
Interior storage spaces see Storage com-
partments
Intermittent wiping
Windshield wipers 61
J
Jack 472, 474
Jacking up the vehicle 498
Jump starting 514K
Key, Mechanical 478
Key, SmartKey 112
Batteries 115, 483
Battery check lamp 112
Checking battery condition 115
Closing the power windows
Convenience closing feature) 256
Closing the tilt/sliding panel*
(Convenience closing feature) 256
Closing the tilt/sliding sunroof*
(Convenience closing feature) 256
Closing, Power tailgate* 127
Factory settings 113
Locking/unlocking 38, 68, 112
Locking/unlocking, Global
setting 114
Loss of 115
Messages in the multifunction
display 461–462
Opening the power windows
(Summer opening feature) 254
Opening the tilt/sliding panel*
(Summer opening feature) 254
Opening the tilt/sliding sunroof*
(Summer opening feature) 254