Page 662 of 723

659 Practical hints
Batteries
Starter battery
Connect the switched-off charging de-
vice to the terminals of the starter bat-
tery. Observe the operating
instructions in the manual for the
charging device while doing so.
Reinstalling starter battery
Install starter battery in engine com-
partment.
Swing retaining bar down.
Reconnecting starter battery
Make sure that the consumer battery in
the trunk is correctly installed and con-
nected.
Turn SmartKey in starter switch to po-
sition 0 and remove.
Connect the positive lead and fasten its
cover2 (
page 657).
Connect negative lead1
(
page 657).
Attach ventilation tube.
Switch on the ignition (page 336).
Start the engine (page 378).
Check vehicle functions.
!Only use charging devices with a maximum
charging voltage of 14.8 V.
Warning!G
During the charge procedure, there is a risk
of acid burns due to gases escaping from
the battery. Do not bend over the battery
during the charge procedure.
!The battery and the battery ventilation hose
must always be securely installed when the vehi-
cle is in operation.
!Always connect the starter battery in the or-
der described below. Otherwise, the vehicle’s
electronics could be damaged.
Warning!G
Do not drive without a properly installed and
connected consumer battery.
Have any work on the consumer battery car-
ried out by an authorized Mercedes-Benz
Center.
!Never invert the terminal connections.
!Make sure that the battery has a plug where
the ventilation tube is attached to it.
Page 668 of 723

665 Practical hints
Towing the vehicle
If you want the gear position to remain in
neutral position N, observe the following
instructions.
Vehicles with SmartKey:
With the vehicle at a standstill and the
ignition switched on shift the
automatic transmission to neutral
positionN.
If engaged, manually release the elec-
tronic parking brake (
page 385).
Switch off the ignition and leave the
SmartKey in the starter switch.Vehicles with KEYLESS-GO*:
With the vehicle at a standstill, depress
the brake pedal and keep it pressed.
With the ignition switched on shift the
automatic transmission to park
positionP.
Release the brake pedal.
Remove the KEYLESS-GO start/stop
button from the starter switch
(
page 337).
Insert the SmartKey with KEYLESS-GO
into the starter switch.
Switch on the ignition.
Depress the brake pedal.
Shift the automatic transmission to
neutral positionN.
Release the brake pedal.
If engaged, manually release the
electronic parking brake (
page 385).
Switch off the ignition and leave the
SmartKey with KEYLESS-GO in the
starter switch.
Warning!G
When leaving the SmartKey or SmartKey
with KEYLESS-GO* in the starter switch, do
not leave children unattended in the vehicle.
It is possible for children to switch on the
ignition which could result in unsupervised
use of vehicle equipment. Unsupervised use
of vehicle equipment could result in an
accident and/or serious personal injury.
iWhen towing the vehicle with all wheels on
the ground, please note the following:
With the automatic central locking activated and
the SmartKey or SmartKey with KEYLESS-GO* in
starter switch position 2, the vehicle doors lock
if the left front wheel as well as the right rear
wheel are turning at vehicle speeds of approxi-
mately 9mph (15km/h) or more.
To prevent the vehicle doors from locking,
deactivate the automatic central locking
(
page 334).
iTo signal turns while being towed with the
hazard warning flasher in use, turn SmartKey or
SmartKey with KEYLESS-GO* in starter switch to
position2 and activate the combination switch
for the left or right turn signal in the usual
manner – only the selected turn signal will
operate.
Upon canceling the turn signal, the hazard
warning flasher will operate again.
Page 708 of 723

705 Index
Light sensor
Message in display 617
Lighter see Cigarette lighter
Lighting 363
Automatic headlamp mode 364
COMAND display illumination 83
Corner-illuminating lamps 368
Courtesy lighting 371
Daytime running lamp mode 365
Door entry lamps 371
High beam flasher 367
Instrument cluster
illumination 402, 448
Interior 369
Manual headlamp mode 364
Trunk 371
Limp-home mode 401
Loading see Vehicle loading
Locator lighting (COMAND) 236Lock button
Door handle
(KEYLESS-GO*) 329, 377
Key, SmartKey 322
Key, SmartKey
with KEYLESS-GO* 326
Trunk lid (KEYLESS-GO*) 331
Locking 384
Automatic central locking
(COMAND) 238
Vehicle in an emergency 636
Locking knob 333
Loss of
Key, Mechanical 332
Key, SmartKey 332
Key, SmartKey
with KEYLESS-GO* 332
Service and Warranty
Information Booklet 673
Low beam headlamps
Replacing bulbs 642
Lowering
Vehicle 654
Lubricants 684
Lumbar support (COMAND) 251M
Maintenance 16, 551
Automatic Call (Tele Aid) 490
Calling up
service indicator display 553
Clearing
service indicator message 551
FSS
(Canada vehicles) 551
Maintenance System
(U.S. vehicles) 551
Resetting service indicator 553
Service indicator message 551
Service term exceeded 552
Maintenance System (U.S. vehicles) 551
Manual headlamp mode 364
MAXCOOL
Maximum cooling 458
Maximum load rating, Tires 545
Maximum loaded
vehicle weight 529, 545
Maximum tire
inflation pressure 542, 546
Maximum tire load rating 541
Memory function 357