Page 6 of 506

Contents
Control system ..................................  133
Multifunction display ....................  133
Multifunction steering wheel ........  134
Menus ..........................................  136
Standard display menu ................  138
AUDIO menu ................................  139
NAV* menu ..................................  141
Vehicle status 
message memory menu ...............  141
Settings menu ..............................  142
Trip computer menu.....................  158
TEL menu* ...................................  160
Automatic transmission .....................  163
One-touch gearshifting.................  165
Gear ranges .................................  166
Gear selector lever position .........  167
Automatic shift program ..............  169
Driving tips ...................................  170
Steering wheel gearshift control 
- CLK 500 and CLK 55 AMG .........  171
Manual shift program 
CLK 55 AMG ................................  173
Emergency operation 
(Limp Home Mode) ......................  175Good visibility ..................................... 176
Headlamp cleaning system* ......... 176
Rear view mirrors.......................... 176
Sun visors ..................................... 178
Rear window defroster .................. 179
Climate control (CLK 320) .................. 180
Deactivating the 
climate control system ................. 183
Setting the temperature................ 183
Adjusting air 
distribution and volume ................ 184
Defrosting ..................................... 185
Air recirculation mode .................. 186
Air conditioning............................. 187
Rear passenger compartment 
adjustable air vents....................... 189
Automatic climate control 
(CLK 500/CLK 55 AMG)..................... 190
Deactivating the automatic 
climate control system ................. 193
Setting the temperature................ 193
Adjusting air distribution............... 194
Adjusting air volume ..................... 194
Defrosting ..................................... 195
Maximum cooling MAXCOOL ........ 195
Air recirculation mode .................. 195Charcoal filter ...............................  197
Air conditioning ............................ 198
Residual heat and ventilation* 
(available on Automatic climate 
control panel design A only) .........  199
Rear passenger compartment 
adjustable air vents ......................  200
Audio system......................................  201
Audio and telephone, operation .... 201
Operating safety ...........................  201
Sound system* ............................. 201
Operating and display elements ... 202
Button and soft key operation ......  204
Operation......................................  204
Radio operation ............................ 209
Introduction to satellite radio* 
(USA only) ..................................... 213
CD mode.......................................  218
GSM network phones ...................  224
TDMA or CDMA network phones ..  231
Emergency calls “911” .................  237
Power windows ..................................  239
Opening and 
closing the windows .....................  239
Synchronizing power windows ......  243 
     
        
        Page 28 of 506
27 At a glance
Center console
Center console
Upper part
Item
Page
1
Seat heater*, driver’s side
Seat ventilation*, driver’s 
side
117
118
2
Parktronic (Parking as-
sist)* deactivation switch
263
3
ESP control switch
86
4
Hazard warning flasher 
switch - switching on/off
127
5
Central locking switch
Central unlocking switch
110
110
6
Switch for lowering rear 
seat head restraints
115
7
Tow-away alarm switch
Anti-theft alarm system in-
dicator lamp
91
92
Item
Page
8
Seat heater*, passenger 
side
Seat ventilation*, 
passenger side
117
118
9
Front passenger front air 
bag off indicator lamp
79,
361
a
Audio system,
or
COMAND* (see separate 
operating instructions)
139
b
Climate control (CLK 320)
Automatic climate control 
(CLK 500/CLK 55 AMG)
Rear window defroster 
180
190,
179 
     
        
        Page 30 of 506
29 At a glance
Overhead control panel
Overhead control panel
Item
Page
1
Tele Aid (emergency call 
system) button
277
2
Hands-free microphone for 
Tele Aid (emergency call 
system) and telephone*
276
3
Temperature sensor for au-
tomatic climate control
4
Right reading lamp on/off
129
5
Interior lighting control
128
6
Interior rear view mirror
41,
176
7
Garage door opener
284
8
Left reading lamp on/off
129 
     
        
        Page 94 of 506
93 Controls in detail
Locking and unlocking
Seats
Memory function
Lighting
Instrument cluster
Control system
Automatic transmission
Good visibility
Climate control (CLK 320)
Automatic climate control (CLK 500/CLK 55 AMG)
Audio system
Power windows
Soft top
Driving systems
Loading
Useful features 
     
        
        Page 180 of 506

179 Controls in detail
Good visibility
Rear window defroster
The rear window defroster uses a large 
amount of power. To keep the battery 
drain to a minimum, switch off the 
defroster as soon as the rear window is 
clear. The defroster is automatically 
deactivated after approximately 
6 to 17 minutes of operation depending on 
the outside temperature.Activating
Press buttonF or1 in the cli-
mate control panel (
page 181) or in 
the automatic climate control panel 
(
page 191).
The indicator lamp on the button 
comes on.
Deactivating
Press buttonF or1 again.
The indicator lamp on the button goes 
out.
Warning!
G
Any accumulation of snow and ice should be 
removed from the rear window before 
driving. Visibility could otherwise be 
impaired, endangering you and others.!If the rear window defroster switches 
off too soon and the indicator lamp 
starts flashing, this means that too 
many electrical consumers are 
operating simultaneously and there is 
insufficient voltage in the battery. The 
system responds automatically by 
deactivating the rear window defroster.
As soon as the battery has sufficient 
voltage, the rear window defroster 
automatically switches on again. 
     
        
        Page 181 of 506
180 Controls in detailClimate control (CLK 320) 
     
        
        Page 182 of 506
181 Controls in detail
Climate control (CLK 320)
Depending on production date, your vehi-
cle is equipped with either climate control 
panel design A or B.Climate control panel design A
Climate control panel design B
Item
1
Left side air vent, adjustable
2
Thumbwheel for air volume control 
for center air vents
3
Right side air vent, adjustable
4
Climate control panel
5
Right center air vent, adjustable
6
Thumbwheel for air volume control 
for right side center air vent 
7
Thumbwheel for air volume control 
for left side center air vent
8
Left center air vent, adjustableiFor draft-free ventilation, move the 
sliders for the side air vents1 and3 
and center air vents5 and  8 to the 
middle position.
Item
1
Air volume control
2
Left side temperature control
3
Right side temperature control
4
Air distribution control
5
Rear window defroster
6
AC cooling on/off (AC
OFF
 or A/C)
7
Air distribution and air volume 
(automatic mode)
8
Air recirculation
9
Defrosting 
     
        
        Page 183 of 506

182 Controls in detailClimate control (CLK 320)The climate control is operational when-
ever the engine is running. You can oper-
ate the climate control system in either the 
automatic or manual mode. The system 
cools or heats the interior depending on 
the selected interior temperature and the 
current outside temperature.Nearly all dust particles, pollutants and 
odors are filtered out before outside air en-
ters the passenger compartment through 
the air distribution system.
The air conditioning will not engage (no 
cooling) if the modeAC
OFF
 is activated or 
mode AC is deactivated (page 187).
Warning!
G
When operating the climate control, the air 
that enters the passenger compartment 
through the air vents in the footwell can be 
very hot or very cold (depending on the set 
temperature). This may cause burns or frost-
bite on unprotected skin in the immediate 
area of the air vents. Always keep sufficient 
distance between unprotected parts of the 
body and the footwell air vents. If necessary, 
change the air flow using the air distribution 
controls to direct the air away from the foot-
well air vents (
page 184).
Warning!
G
Follow the recommended settings for heat-
ing and cooling given on the following pag-
es. Otherwise the windows could fog up, 
impairing visibility and endangering you and 
others.