Page 5 of 481

ContentsSafety and Security...........................  63
Occupant safety...................................  64
Air bags ..........................................  65
Seat belts .......................................  71
Children in the vehicle ....................  75
Panic alarm ..........................................  80
Activating .......................................  81
Deactivating ...................................  81
Driving safety systems .........................  82
ABS ................................................  82
BAS ................................................  83
ESP
®...............................................  84
Anti-theft systems................................  87
Immobilizer.....................................  87
Anti-theft alarm system ..................  87
Tow-away alarm .............................  88
Controls in detail...............................  91
Locking and unlocking .........................  92
SmartKey .......................................  92
Opening the doors from the inside .  97
Opening the trunk ..........................  98
Closing the trunk............................  99
Trunk lid emergency release ........  100
Automatic central locking ............  101
Locking and unlocking from 
the inside .....................................  102
Seats .................................................  104
Seat heating* ...............................  104
AIRSCARF neck-level heating* .....  105
Memory function* .............................  107
Storing positions into memory .....  108
Recalling positions from memory .  108
Storing exterior rear view mirror 
parking position (parking aid).......  108
Lighting..............................................  110
Exterior lamp switch.....................  110
Combination switch .....................  114
Corner-illuminating front fog 
lamps* (SLK 280, SLK 350: with 
Bi-Xenon* headlamps and without 
Sport Package*)...........................  115Hazard warning flasher ................  117
Interior lighting ............................  117
Door entry lamps .........................  119
Instrument cluster .............................  120
Instrument cluster illumination ....  120
Tachometer ..................................  121
Outside temperature indicator .....  121
Trip odometer ..............................  122
Clock............................................  122
Control system ..................................  123
Multifunction display....................  123
Multifunction steering wheel........  124
Menus ..........................................  126
Standard display menu ................  128
AUDIO menu ................................  129
NAV* menu ..................................  132
Vehicle status message 
memory menu ..............................  132
Settings menu ..............................  134
Trip computer menu.....................  149
TEL menu* ...................................  151
Manual transmission .........................  155
Shifting into reverse .....................  156
Automatic transmission* ...................  157
Gear selector lever position .........  159
Gear ranges .................................  160 
     
        
        Page 123 of 481
122 Controls in detailInstrument clusterTrip odometer
Make sure you are viewing the stan-
dard display menu (
page 128).
Press and hold reset buttonJuntil 
the trip odometer is reset.
Clock
Vehicles with COMAND*:
The clock in the instrument cluster can be 
synchronized with the time set in 
COMAND using the time synchronization 
with head unit feature (
page 139), or set 
independently from COMAND using the 
control system (
page 139) with the time 
synchronization with head unit feature set 
to 
Off
.
For setting the time in COMAND, see sep-
arate COMAND operating instructions.
For setting the time with audio system, 
(
page 139). 
     
        
        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 182 of 481

181 Controls in detail
Climate control
Switching climate control system on/off
Switching on
Switch on the ignition (
page 36).
Set air volume control2 to any speed 
(page 179).
The previous settings are once again in 
effect.
Switching off
Set air volume control2 (
page 179) 
to position0.
Setting the temperature
Use temperature controls1 and4 
(page 179) to separately adjust the air 
temperature on each side of the passenger 
compartment. You should raise or lower 
the temperature setting in small incre-
ments, preferably starting at 72°F (22°C). 
The climate control will adjust to the set 
temperature as fast as possible.Increasing
Turn temperature control 
1and/or4 (
page 179) slightly 
clockwise.
The climate control system will corre-
spondingly adjust the interior air tem-
perature.
Decreasing
Turn temperature control 
1and/or4 (
page 179) slightly 
counterclockwise.
The climate control system will corre-
spondingly adjust the interior air tem-
perature.
iWhen the climate control system is 
switched off, the outside air supply and 
circulation are also switched off. Only 
choose this setting for a short time. 
Otherwise the windows could fog up. 
     
        
        Page 189 of 481

188 Controls in detailClimate controlMaximum cooling
Turn thumbwheels5and8 
(page 178) upwards to the first stop.
The fixed center air vents4and9 
(page 178) and the adjustable air 
vents6and7 (
page 178) are 
open.
For draft-free ventilation, move the 
sliders for the center air vents 
6and7 (
page 178) to the middle 
position.
Turn thumbwheels1andc 
(page 178) for the adjustable side air 
vents2andb (
page 178) to the 
fully open position.
Set air distribution control3 
(page 182) to positiona.
The air distribution directs the air 
through the center and side air vents.
Set air volume control2 (
page 183) 
to position5.
The ventilation operates with maximum 
blower speed.
Turn temperature controls1and4 
(page 179) completely counterclock-
wise to their end stops.
The lowest temperature for both sides 
is set.
Residual engine heat utilization
With the engine switched off, it is possible 
to continue to heat or ventilate the interior 
for up to 30 minutes. This feature makes 
use of the residual heat produced by the 
engine.
iWhen the vehicle’s interior has cooled 
down enough, reduce the air volume 
and increase the air temperature to 
comfortable settings if desired. 
     
        
        Page 391 of 481
390 Practical hintsWhere will I find...?Operational position
Turn crank handle clockwise.
Before storing the vehicle jack in its 
compartment:
It should be fully collapsed.
The handle must be folded in (storage 
position).Setting up the collapsible wheel chock
The collapsible wheel chock serves to ad-
ditionally secure the vehicle, e.g. while 
changing the wheel.
1Tilt the plate upward
2Fold the lower plate outward
3Insert the plate
Tilt both plates upward1.
Fold the lower plate outward2.
Guide the tabs of the lower plate all the 
way into the openings of the base 
plate3.