Page 94 of 434

93 Controls in detail
Locking and unlocking
Loss of SmartKey or mechanical key
If you lose a SmartKey or mechanical key,
you should do the following:
Have the SmartKey deactivated by an
authorized Mercedes-Benz Center.
Report the loss of the SmartKey or the
mechanical key to your car insurance
company immediately.
If necessary, have the mechanical lock
replaced.
Your authorized Mercedes-Benz Center
will be glad to supply you with a replace-
ment.
SmartKey with KEYLESS-GO*
Vehicles equipped with KEYLESS-GO*
come with two SmartKeys with
KEYLESS-GO, each with remote controls
and a removable mechanical key. The lock-
ing tabs for the mechanical key portion of
the two SmartKeys are a different color to
help distinguish each SmartKey unit.
The KEYLESS-GO function is integrated
into the SmartKey. On these vehicles, the
validity of the SmartKey with KEYLESS-GO
is checked every time you grasp a door
handle.
If the SmartKey with KEYLESS-GO is valid,
your vehicle unlocks
the doors
the trunk lid
the glove box
the storage compartment under the
armrest
the storage compartment in the rear
the fuel filler flap
SmartKey with KEYLESS-GO1‹Lock button
2Š Unlock button for the trunk lid
3Mechanical key locking tab
4ŒUnlock button
5Battery check lamp
6Â Panic button (
page 74)
For information on using the SmartKey
buttons, see “SmartKey” (page 90).
Page 97 of 434

96 Controls in detailLocking and unlockingFactory setting
Global unlocking
Grasp the door handle.
The vehicle will lock again automatically
within approximately 40 seconds of un-
locking if neither door nor trunk is opened.
Global locking
Press lock button at door handle
(page 55) or trunk (
page 98).Selective setting
If you frequently travel alone, you may wish
to reprogram the SmartKey with
KEYLESS-GO so that grasping a door han-
dle only unlocks the driver’s door, interior
lockable storage compartments and the
fuel filler flap.
Press and hold buttons Œ and ‹
simultaneously for about six seconds
until battery check lamp5
(page 90) flashes twice.
The SmartKey with KEYLESS-GO will
then function as follows:
Unlocking the driver’s door
Grasp the driver’s door handle.
Global unlocking
Grasp the door handle on the passen-
ger side.
Global locking
Press lock button at door handle or
trunk lid.Restoring to factory setting
Press and hold buttons Œ and ‹
simultaneously for about six seconds
until battery check lamp5
(page 93) flashes twice.
iThe vehicle could inadvertently unlock
if the SmartKey with KEYLESS-GO is
within 3 ft (1 m) of the vehicle and
the door handle is splashed with
water
or
you attempt to clean the door
handle
!If you can no longer lock or unlock the
vehicle with the SmartKey with
KEYLESS-GO, then the battery in the
SmartKey is discharged, the SmartKey
with KEYLESS-GO is malfunctioning or
the vehicle battery is drained.
Check the battery in the SmartKey
with KEYLESS-GO (
page 92) and
replace it if necessary
(
page 328).
Use the mechanical key to unlock
the doors (
page 325).
Page 106 of 434

105 Controls in detail
Locking and unlocking
Automatic central locking
The doors and the trunk lid lock automati-
cally when the vehicle is set into motion.
You can open a locked door from the in-
side. Open door only when conditions are
safe to do so.
You can deactivate the automatic locking
using the control system (
page 146).
Locking and unlocking from the inside
You can lock or unlock the vehicle from in-
side using the central locking switches.
This can be useful, for example, if you want
to unlock the passenger door from the in-
side or want to lock the vehicle before
starting to drive.
The central locking switch does not lock or
unlock the fuel filler flap.The switches are located above and be-
tween the center air vents of the air condi-
tioning.
Central locking switches1Locking
2Unlocking
iThe doors unlock automatically after an
accident if the force of the impact ex-
ceeds a preset threshold.
The vehicle locks automatically when
the ignition is switched on and the
wheels are turning at vehicle speeds of
approximately 9 mph (15 km/h) or
more. You could therefore lock yourself
out when the vehicle
is pushed
is on a test stand
Warning!
G
When leaving the vehicle, always remove the
SmartKey from the starter switch, take the
SmartKey with KEYLESS-GO
* with you and
lock the vehicle. Do not leave children unat-
tended in the vehicle, or with access to an
unlocked vehicle. Unsupervised use of vehi-
cle equipment may cause an accident
and/or serious personal injury.
Warning!
G
You can open a locked door from inside at
any time. Open door only when conditions
are safe to do so.
Page 126 of 434

125 Controls in detail
Instrument cluster
During severe operating conditions, e.g.
stop-and-go traffic, the coolant tempera-
ture may rise close to 248°F (120°C).
The engine should not be operated with
the coolant temperature above 248°F
(120°C). Doing so may cause serious en-
gine damage which is not covered by the
Mercedes-Benz Limited Warranty.
Trip odometer
Make sure you are viewing the trip
odometer display (
page 127).
If it is not displayed, press the j or
k button on the multifunction
steering wheel repeatedly until the trip
odometer appears.
Press and hold reset button4
(page 22) until the trip odometer is
reset.
Tachometer
The red marking on the tachometer de-
notes excessive engine speed.
To help protect the engine, the fuel supply
is interrupted if the engine is operated
within the red marking.
SL 55 AMG
The tachometer of the SL 55 AMG does not
have a red marking denoting excessive en-
gine speed.
To help protect the engine, the fuel supply
is interrupted if the engine is operated at
an excessive speed.
!Excessive coolant temperature triggers
the coolant temperature warning lamp
(page 304) and a warning in the
multifunction display (
page 286).
!Avoid driving at excessive engine
speeds, as it may result in serious en-
gine damage that is not covered by the
Mercedes-Benz Limited Warranty.
Page 132 of 434
131 Controls in detail
Control system
Menus, submenus and functions
Menu 1
Menu 2
Menu 3
Menu 4
Menu 5
Menu 6
Menu 7
Menu 8
Standard dis-
play
AUDIO
NAVI
Distronic*
Malfunction
memory
Settings
Trip computer
Telephone
Commands/submenusDigital speed-
ometer
Select radio
station
Activate
route guid-
ance
Call up set-
tings
Call up malfunc-
tion messages
Reset to factory
settings
Fuel consump-
tion statistics af-
ter start
Load phone
book
Call up FSS
Select satel-
lite radio sta-
tion*
(USA only)
Instrument clus-
ter submenu
Fuel consump-
tion statistics
since the last re-
set
Search for
name in
phone book
Check tire
pressure*
Operate CD
player
Lighting sub-
menu
Call up range
Check engine
oil level
Vehicle sub-
menuConvenience
submenu
Page 151 of 434
150 Controls in detailControl system
The selection marker is on the current
setting.
Press æ or ç to switch function On or
Off
.
Trip computer menu
Use the trip computer menu to call up sta-
tistical data on your vehicle. The following
information is available:Fuel consumption statistics after start
Press button ÿ or è repeatedly
until you see the first function of the
Trip computer menu.
Press button j or k repeatedly
until you see this message in the left
display:
After start.
1Distance driven since start
2Average speed since start
3Time elapsed since start
4Average fuel consumption since start
Function
Page
Fuel consumption statistics after
start
150
Fuel consumption statistics
since last reset
151
Call up range (distance to empty)
152
iThe last function called up will reap-
pear the next time you enter the trip
computer menu.
Page 152 of 434

151 Controls in detail
Control system
Fuel consumption since last reset
Press button ÿ or è repeatedly
until you see the first function of the
Trip computer menu.
Press button j or k repeatedly
until you see this message in the left
display:
From reset.
1Distance driven since last reset
2Average speed since last reset
3Time elapsed since last reset
4Average fuel consumption since last re-
setResetting fuel consumption statistics
Press button ÿ or è repeatedly
until you see the first function of the
Trip computer menu.
Press button j or k repeatedly
until you see the reading that you want
to reset in the left display.
Press and hold the reset button in the
instrument cluster (
page 23) until
the value is reset to 0.
iAll statistics stored since the last en-
gine start will be reset approximately
four hours after the SmartKey in the
starter switch is turned to position0 or
removed from the starter switch.
Resetting will not occur if you turn the
SmartKey back to position1 or2 with-
in this time period.
Page 153 of 434

152 Controls in detailControl systemCall up range (distance to empty)
Press button ÿ or è repeatedly
until you see the first function of the
Trip computer menu.
Press button j or k repeatedly
until you see this message in the left
display:
Range
.
In the right display you will see the cal-
culated range based on the current fuel
tank level.
TEL menu*
You can use the functions in the
TEL
menu
to operate your telephone, provided it is
connected to a hands-free system and
switched on.
Switch on the telephone and COMAND.
Press button ÿ or è on the
steering wheel repeatedly until you see
the
TEL
menu in the left display.
Warning!
G
A driver’s attention to the road must always
be his/her primary focus when driving. For
your safety and the safety of others, we rec-
ommend that you pull over to a safe location
and stop before placing or taking a tele-
phone call. If you choose to use the tele-
phone while driving, please use the
hands-free device and only use the tele-
phone when weather, road, and traffic con-
ditions permit.
Some jurisdictions prohibit the driver from
using a cellular telephone while driving a ve-
hicle.
Bear in mind that at a speed of just 30 mph
(approximately 50 km/h), your vehicle is
covering a distance of 44 feet (approximate-
ly 14 m) every second.
Never operate radio transmitters equipped
with a built-in or attached antenna (i.e. with-
out being connected to an external antenna)
from inside the vehicle while the engine is
running. Doing so could lead to a malfunc-
tion of the vehicle’s electronic system, pos-
sibly resulting in an accident and/or
personal injury.