Page 126 of 481
125 Controls in detail
Control system
In the 
Settings...
 menu, you will find a 
number of submenus instead of functions 
for calling up and changing settings. For in-
structions on using these submenus, see 
“Settings menu” (page 134).
The number of menus available in the sys-
tem depends on which optional equipment 
is installed in your vehicle.
iThe headings used in the menus table 
are designed to facilitate navigation 
within the system and are not neces-
sarily identical to those shown in the 
control system displays.
The first function displayed in each 
menu will automatically show you 
which part of the system you are in.
iSLK 55 AMG:
The steering wheel in this vehicle will 
vary from steering wheel shown. How-
ever, multifunction steering wheel sym-
bols and feature description apply to 
AMG vehicles as well. 
     
        
        Page 133 of 481

132 Controls in detailControl systemNAV* menu
The 
NAV
 menu contains the functions need-
ed to operate your navigation system.
Press buttonèorÿ repeatedly 
until you see the message 
NAV
 in the 
multifunction display.
If the COMAND system is switched 
off, the message 
NAV off
 is shown 
in the multifunction display.
With COMAND switched on but 
route guidance not activated, the 
direction of travel and, if available, 
the name of the street currently 
traveled on appear in the multifunc-
tion display.
With COMAND switched on and 
route guidance activated, the direc-
tion of travel and maneuver instruc-
tions appear in the multifunction 
display.
Please refer to the COMAND* manual for 
instructions on how to activate the route 
guidance system.
Vehicle status message memory menu
Use the vehicle status message memory 
menu to scan malfunction and warning 
messages that may be stored in the sys-
tem. Such messages appear in the multi-
function display and are based on 
conditions or system status the vehicle’s 
system has recorded.
The vehicle status message memory menu 
only appears if there are any messages 
stored in the system. 
     
        
        Page 140 of 481

139 Controls in detail
Control system
Time/Date submenu
Access the 
Time/Date
 submenu via the 
Settings...
 menu. Use the 
Time/Date
 
submenu to change the instrument cluster 
display settings.
The following functions are available:Time and date synchronization with 
head unit*
This function can only be seen on vehicles 
with COMAND* and navigation module*.
Move the selection marker with 
buttonæorç to the 
Time/Date
 
submenu.
Press buttonjork repeatedly 
until you see 
Synchronization with 
head unit
 in the multifunction display.
The selection marker is on the current 
setting.
Press buttonæorç to select 
the desired setting.Setting the time (hours)
This function can be seen in vehicles with 
audio system, or in vehicles with 
COMAND* and navigation module*, if the 
time and date synchronization with head 
unit* feature was set to 
Off 
(page 139).
Function
Page
Time synchronization with head 
unit*
139
Setting the time (hours)
139
Setting the time (minutes)
140
Setting the date (month)
141
Setting the date (day)
141
Setting the date (year)
142
iVehicles with COMAND*:
For information on setting the time in 
COMAND, refer to the separate 
COMAND operating instructions. 
     
        
        Page 141 of 481

140 Controls in detailControl system
Move the selection marker with 
buttonæorç to the 
Time/Date
 
submenu.
Press buttonjork repeatedly 
until you see 
Clock, hours
 in the mul-
tifunction display.
The selection marker is on the hours.
Press buttonæorç to set the 
correct hours displayed in the multi-
function display.
Press reset buttonJto confirm the 
set hours.Setting the time (minutes)
This function can be seen in vehicles with 
audio system, or in vehicles with 
COMAND* and navigation module*, if the 
time and date synchronization with head 
unit* feature was set to 
Off 
(page 139).
Move the selection marker with 
buttonæorç to the 
Time/Date
 
submenu.
Press buttonjork repeatedly 
until you see 
Clock, minutes
 in the 
multifunction display.
The selection marker is on the minutes.
Press buttonæorç to set the 
correct minutes displayed in the multi-
function display.
Press reset buttonJto confirm the 
set minutes.
iVehicles with COMAND*:
For information on setting the time in 
COMAND, refer to the separate 
COMAND operating instructions. 
     
        
        Page 142 of 481
141 Controls in detail
Control system
Setting the date (month)
This function can be seen in vehicles with 
audio system, or in vehicles with 
COMAND* and navigation module*, if the 
time and date synchronization with head 
unit* feature was set to 
Off 
(page 139).
Move the selection marker with 
buttonæorç to the 
Time/Date
 
submenu.
Press buttonjork repeatedly 
until you see 
Set date month
 in the 
multifunction display.
The selection marker is on the month.
Press buttonæorç to set the 
month.Setting the date (day)
This function can be seen in vehicles with 
audio system, or in vehicles with 
COMAND* and navigation module*, if the 
time and date synchronization with head 
unit* feature was set to 
Off 
(page 139).
iVehicles with COMAND*:
For information on setting the time in 
COMAND, refer to the separate 
COMAND operating instructions.
iVehicles with COMAND*:
For information on setting the time in 
COMAND, refer to the separate 
COMAND operating instructions. 
     
        
        Page 143 of 481
142 Controls in detailControl system
Move the selection marker with 
buttonæorç to the 
Time/Date
 
submenu.
Press buttonjork repeatedly 
until you see 
Set date day
 in the mul-
tifunction display.
The selection marker is on the day.
Press buttonæorç to set the 
day.Setting the date (year)
This function can be seen in vehicles with 
audio system, or in vehicles with 
COMAND* and navigation module*, if the 
time and date synchronization with head 
unit* feature was set to 
Off 
(page 139).
Move the selection marker with 
buttonæorç to the 
Time/Date
 
submenu.
Press buttonjork repeatedly 
until you see 
Set date year
 in the mul-
tifunction display.
The selection marker is on the year.
Press buttonæorç to set the 
year.
iVehicles with COMAND*:
For information on setting the time in 
COMAND, refer to the separate 
COMAND operating instructions. 
     
        
        Page 275 of 481

274 Controls in detailUseful features
To activate, press the SOS button, the 
Roadside Assistance button• or 
the Information button¡, depend-
ing on the type of response required.System self-check
Initially, after switching on ignition, mal-
functions are detected and indicated (the 
indicator lamps in the SOS button, the 
Roadside Assistance button•, and the 
Information button¡ stay on longer 
than 10 seconds or do not come on). The 
message 
Malfunction. Drive to 
workshop appears for approximately 
10 seconds in the multifunction display.
iThe SOS button is located in the over-
head control panel.
The Roadside Assistance button• 
and the Information button¡ are 
located below the center armrest cov-
er.!The Tele Aid system utilizes the cellular 
network for communication and the 
GPS (Global Positioning System) satel-
lites for vehicle location. If either of 
these signals are unavailable, the 
Tele Aid system may not function and if 
this occurs, assistance must be sum-
moned by other means.
iWhen a Tele Aid call has been initiated, 
the audio system or COMAND* system 
audio is muted and the selected mode 
(radio, tape or CD) pauses. The optional 
cellular phone* (if installed) and insert-
ed in cradle switches off. If you must 
use this phone, we recommend that 
you use it only with the vehicle at a 
standstill in a safe location. Remove 
the phone from the cradle and place 
the call. The COMAND* navigation sys-
tem (if engaged) will continue to run. 
The display in the instrument cluster is 
available for use, and spoken com-
mands are only available by pressing 
the RPT button on the COMAND* unit. 
A pop-up window will appear in the 
COMAND* display to indicate that a 
Tele Aid call is in progress. After the 
Tele Aid call has ended, the optional 
cellular phone switches on again. A PIN 
entry might be necessary. 
     
        
        Page 459 of 481

458 Technical termsCAN system
(C
ontroller A
rea N
etwork)
Data bus network serving to control ve-
hicle functions such as door locking or 
windshield wiping.
Cockpit
All instruments, switches, buttons and 
indicator/warning lamps in the passen-
ger compartment needed for vehicle 
operation and monitoring.
Cold tire inflation pressure
(
page 344)
Collapsible tire
An especially compact spare tire that 
must be inflated with a provided air 
pump before using. It should only be 
used to bring the vehicle to the nearest 
service station.COMAND*
(Co
ckpit Man
agement and 
D
ata System)
Information and operating center for 
vehicle sound and communications 
systems, including the radio, 
CD changer and navigation system, as 
well as other optional equipment (e.g. 
telephone).
Control system
The control system is used to call up 
vehicle information and to change 
component settings. Information and 
messages appear in the multifunction 
display. The driver uses the buttons on 
the multifunction steering wheel to 
navigate through the system and to ad-
just settings.
Cruise control
Driving convenience system for auto-
matically maintaining the vehicle speed 
set by the driver.Curb weight
(
page 344)
DOT
(Department o
f Transportation)
(
page 344)
Engine number
The number set by the manufacturer 
and placed on the cylinder block to 
uniquely identify each engine pro-
duced.
Engine oil viscosity
Measurement for the inner friction (vis-
cosity) of the oil at different tempera-
tures. The higher the temperature an 
oil can tolerate without becoming thin, 
or the lower the temperature it can tol-
erate without becoming viscous, the 
better the viscosity.
ESP®(Electronic S
tability Pr
ogram)
Improves vehicle handling and direc-
tional stability.