455 Practical hints
Battery
Charging and reinstalling the battery
Charge battery in accordance with the
instructions of the battery charger
manufacturer.
Reinstall the charged battery. Follow
the previously described steps in
reverse order.
Reconnecting the battery
Turn off all electrical consumers.
Remove SmartKey from starter switch.
Vehicles with KEYLESS-GO*:
Press the start / stop button until
the engine shuts off.
Open the driver’s door.
Connect the battery positive lead and
fasten its cover3.
Connect the battery negative lead2.
Reinstall the filter box (
page 453).
Batteries contain materials that can harm
the environment if disposed of improperly.
Large 12-volt storage batteries contain
lead. Recycling of batteries is the preferred
method of disposal. Many states require
sellers of batteries to accept old batteries
for recycling.
Warning!
G
Never charge a battery while still installed in
the vehicle unless the accessory battery
charge unit* approved by Mercedes-Benz is
being used. Gases may escape during charg-
ing and cause explosions that may result in
paint damage, corrosion or personal injury.
An accessory battery charge unit* specially
adapted for Mercedes-Benz vehicles and
tested and approved by Mercedes-Benz is
available, permitting the charging of the bat-
tery in its installed position. Contact an au-
thorized Mercedes-Benz Center for
information and availability. Charge battery
in accordance with the separate instruc-
tions for the accessory battery charger*.
!The battery, its filler caps and the vent
tube must always be securely installed
when the vehicle is in operation.!NEVER invert the terminal connections!
iThe following procedures must be
carried out following any interruption of
battery power (e.g. due to reconnect-
ing):
Set the clock (
page 153).
Vehicles with COMAND*:
see COMAND operator’s manual.
Synchronize the side windows
(page 251).
459 Practical hints
Towing the vehicle
Warning!
G
Prior to towing the vehicle with all wheels on
the ground, make certain that the SmartKey
is in starter switch position
2.
If the SmartKey is left in starter switch posi-
tion
0 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.
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.
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.iTo signal turns while being towed with
the hazard warning flasher in use,
switch on the ignition 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 haz-
ard warning flasher will operate again.
!When towing the vehicle with all wheels
on the ground, please note the follow-
ing:
With the automatic central locking acti-
vated and the SmartKey in starter
switch position2, or KEYLESS-GO*
start/stop button in position2, the ve-
hicle doors lock if the left front wheel
as well as the right rear wheel are turn-
ing at vehicle speeds of approx. 9 mph
(15 km / h) or more.
Switch off the tow-away alarm
(page 94).
To prevent the vehicle door locks from
locking, deactivate the automatic cen-
tral locking (
page 159).
Towing of the vehicle should only be
done using the properly installed tow-
ing eye bolt. Never attach tow cable,
tow rope or tow rod to the vehicle chas-
sis, frame or suspension parts.
501 Index
K
Key, Mechanical 419
Key, SmartKey 96
Batteries 99, 105
Battery check lamp 98, 104
Changing batteries 436
Factory setting 98, 99
Ignition 34
Locking/unlocking 32, 60, 96
Locking/unlocking, Global setting 98
Locking/unlocking,
Selective setting 98
Loss of 100, 106
Message in display 403, 404
Opening and closing
the power windows 252
Opening and closing the soft top 260
Positions in starter switch 34
Remote control 96
SmartKey with KEYLESS-GO* 100
Starting the engine 49
Turning off the engine 58
Unlocking/opening trunk lid 99
Key, SmartKey with KEYLESS-GO*
Changing batteries 437KEYLESS-GO* 100, 489
Batteries in SmartKey 105
Battery check lamp, SmartKey 104
Factory setting 103, 105
Ignition 36
Important notes 102
Lock button 60
Locking/unlocking 33, 60, 100
Locking/unlocking,
Global setting 103, 104
Locking/unlocking, Global
with lock button on trunk lid 105
Locking/unlocking,
Selective setting 104
Loss of key 106
Messages in display 403, 404
Remote control 100
Start/stop button 35
Starting the engine 49
Turning off the engine 59
Unlocking/opening trunk lid 106
Kickdown 170, 489
Kilopascal 356L
Labels 468
Certification 468
Emission control information 468
Vacuum line routing diagram 468
Lamp sensor
Messages in display 405
Lamps, exterior 438
Light sensor 405
Messages in display 404–408
Lamps, indicator and warning
ABS 25, 374
Battery (SmartKey) 98, 104
Brakes 25, 375
Center console 381–382
CHECK ENGINE 376
Coolant 377
Coolant temperature 25, 137
Distance warning 25
Engine diagnostics 376
Engine malfunction 25, 376
ESP
®
25, 378
Fog lamps 130
Front passenger front air bag off 68
Front passenger front
air bag off indicator lamp 381
