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 29 of 506
28 At a glanceCenter consoleLower part
Item
Page
1
Ashtray
Cigarette lighter
273
274
2
KEYLESS-GO* start/stop 
button
35
3
Storage compartment
270
4
Soft top switch
247
5
Program mode selector 
switch for automatic trans-
mission
Automatic shift 
program
Manual shift program 
(CLK 55 AMG)
169
174
6
Gear selector lever for 
automatic transmission
163 
     
        
        Page 48 of 506
47 Getting started
Driving
Automatic transmissionGearshift pattern for automatic 
transmissionPPark position with gear selector lever 
lock
RReverse gear
NNeutral
DDrive position
For more information, see “Automatic 
transmission” (
page 163).Starting with the SmartKey
Make sure the gear selector lever is set 
toP.
Do not depress accelerator.
Turn the SmartKey in the starter switch 
to position3 (
page 34) and release it 
again immediately (“touch-start”).
The engine then starts automatically.
Depress the brake pedal.
The gear selector lever lock is released.
For information on turning off the engine 
with the SmartKey, see (
page 56).Starting with KEYLESS-GO*
You can start your vehicle without the 
SmartKey in the starter switch using the 
KEYLESS-GO start/stop button on the 
gear selector lever.
The SmartKey with KEYLESS-GO must be 
located in the vehicle.
KEYLESS-GO start/stop button1KEYLESS-GO start/stop button 
(U.S. vehicles)
2KEYLESS-GO start/stop button 
(Canada vehicles)
 
     
        
        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 134 of 506

133 Controls in detail
Control system
Control system
The control system is activated as soon as 
the SmartKey in the starter switch is 
turned to position1 or as soon as the 
KEYLESS-GO* start/stop button is in 
position1. The control system enables you 
to
call up information about your vehicle
change vehicle settings
For example, you can use the control sys-
tem to find out when your vehicle is next 
due for service, to set the language for 
messages in the instrument cluster dis-
play, and much more.
The control system relays information to 
the multifunction display.
Multifunction display
1Outside temperature
2Trip odometer
3Automatic transmission program mode
4Main odometer
5Current gear selector lever position
For more information on menus displayed 
in the multifunction display, see “Menus” 
(page 136).
iThe displays for the audio systems 
(radio, CD player) will appear in English, 
regardless of the language selected.
Warning!
G
A driver’s attention to the road and traffic 
conditions must always be his /her primary 
focus when driving.
For your safety and the safety of others, 
selecting features through the multifunction 
steering wheel should only be done by the 
driver when traffic and road conditions 
permit it to be done safely.
Bear in mind that at a speed of just 30 mph 
(approximately 50 km/h), your vehicle is 
covering a distance of 44 feet (approxi-
mately 14 m) every second. 
     
        
        Page 164 of 506

163 Controls in detail
Automatic transmission
Automatic transmission
For more information on driving with an 
automatic transmission, see “Automatic 
transmission” (
page 47).
Your vehicle’s transmission adapts its gear 
shifting process to your individual driving 
style by continually adjusting the shift 
points up or down. These shift point adjust-
ments are performed based on current 
operating and driving conditions.
If the operating conditions change, the 
automatic transmission reacts by 
adjusting its shift program.
Gearshift pattern for automatic 
transmission
The automatic transmission selects indi-
vidual gears automatically, depending on:
the gear selector lever 
positionD(
page 167) with 
gear ranges (page 166)
the selected program mode:
(C/S) (
page 169)
or
(M/C/S) (CLK 55 AMG only) 
(
page 173)
the position of the accelerator pedal 
(page 170)
the vehicle speed
iDuring the brief warm-up, transmission 
upshifting is delayed. This allows the 
catalytic converter to heat up more 
quickly to operating temperature. 
     
        
        Page 165 of 506

164 Controls in detailAutomatic transmission1Current gear range/gear selector lever 
position
2Current program mode
The current gear range/gear selector lever 
position and program mode (
C/S) or 
(
M/C/S) appear in the multifunction 
display.An additional indication of the current gear 
selector lever position can be found on the 
cover of the shifting-gate.
The indicators come on when you activate 
a switch (e.g. unlocking the vehicle or 
opening a door) and go out after approxi-
mately 15 minutes.
When the gear selector lever is in 
positionD, you can influence transmission 
shifting by:
limiting the gear range
changing gears manually
Warning!
G
It is dangerous to shift the gear selector 
lever out ofP orN if the engine speed is 
higher than idle speed. If your foot is not 
firmly on the brake pedal, the vehicle could 
accelerate quickly forward or reverse. You 
could lose control of the vehicle and hit 
someone or something. Only shift into gear 
when the engine is idling normally and when 
your right foot is firmly on the brake pedal.
!Allow engine to warm up under low 
load use. Do not place full load on the 
engine until the operating temperature 
has been reached.
Shift into reverse gearR or parking 
positionP only when the vehicle is 
stopped.
Avoid spinning of a drive wheel for an 
extended period when driving off on 
slippery road surfaces. This may cause 
serious damage to the drivetrain which 
is not covered by the Mercedes-Benz 
Limited Warranty. 
     
        
        Page 166 of 506

165 Controls in detail
Automatic transmission
One-touch gearshifting 
Even with an automatic transmission you 
can change the gears manually when the 
gear selector lever is in positionD.
Downshifting
Briefly press the gear selector lever to 
the left in theD-direction.
The transmission will shift from the current 
gear to the next lower gear as permitted by 
the shift program. This action 
simultaneously limits the gear range of the 
transmission (
page 166).Upshifting
Briefly press the gear selector lever to 
the right in theD+direction.
The transmission will shift from the current 
gear to the next higher gear as permitted 
by the shift program. This action simul-
taneously extends the gear range of the 
transmission.Canceling gear range limit
Press and hold the gear selector lever 
in theD+direction until
D reappears in 
the multifunction display.
The transmission will shift from the current 
gear range directly to gear rangeD.
Shifting into optimal gear range 
Press and hold the gear selector lever 
in theD-direction.
The transmission will automatically select 
the gear range suited for optimal 
acceleration and deceleration. This will 
involve shifting down one or more gears.
Warning!
G
On slippery road surfaces, never downshift 
in order to obtain braking action. This could 
result in drive wheel slip and reduced 
vehicle control. Your vehicle’s ABS will not 
prevent this type of loss of control.
iTo avoid overrevving the engine when 
the gear selector lever is moved to 
theD-direction, the transmission will 
not shift to a lower gear if the engine’s 
max. speed would be exceeded.