Page 172 of 498

170 Controls in detailAutomatic transmission
Automatic shift program
The program mode selector switch is 
located on the lower part of the center 
console.
1Program mode selector switch
C Comfort For comfort driving
S Sport For standard driving
The current gear selector lever position 
and the selected program mode (
C/S) are 
indicated in the multifunction display 
(
page 166).
!Coasting the vehicle, or driving for any 
other reason with gear selector lever 
inN can result in transmission damage 
that is not covered by the 
Mercedes-Benz Limited Warranty.Warning!
G
Getting out of your vehicle with the gear 
selector lever not fully engaged in positionP 
is dangerous. Also, positionP alone is not 
intended to or capable of preventing your 
vehicle from moving, possibly hitting people 
or objects.
Always set the parking brake in addition to 
shifting to positionP (page 54).
When parked on an incline, turn the front 
wheels towards the road curb.
Do not park this vehicle in areas where 
combustible materials such as grass, hay or 
leaves can come into contact with the hot 
exhaust system, as these materials could be 
ignited and cause a vehicle fire.
Warning!
G
When leaving the vehicle, always remove the 
SmartKey or SmartKey with KEYLESS-GO* 
from the starter switch, take it with you, and 
lock the vehicle. Do not leave children unat-
tended in the vehicle, or with access to an 
unlocked vehicle. Children could move the 
gear selector lever from positionP, which 
could result in an accident and/or serious 
personal injury. 
     
        
        Page 178 of 498

176 Controls in detailAutomatic transmissionThe program mode selector switch is 
located on the lower part of the center 
console.
1Program mode selector switch
M Manual For manual gear shifting
C Comfort For comfort driving
S Sport For standard driving
The current gear selector lever position 
and the selected program mode (
M/C/S) 
are indicated in the multifunction display 
(
page 166).Activating manual shift program
Press program mode selector 
switch1 repeatedly until the
M for 
manual program modeM appears in 
the multifunction display.
The transmission switches to the 
manual program modeM. Automatic 
shifting is switched off. The gear range 
is not limited.
You can change the gears manually when 
the gear selector lever is in positionD. You 
can upshift or downshift through the gears 
in succession.Downshifting
Briefly press the gear selector lever to 
the left in theD-direction 
(page 167).
or
Press button1 on the left side of the 
steering wheel (
page 174).
The transmission shifts to the next 
lower gear.
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.iWhen you brake or stop, the transmis-
sion shifts down to a gear from which 
you can easily accelerate or take off. 
     
        
        Page 184 of 498

182 Controls in detailGood visibilityRear window sunshade*
The switch is located in the center console.
1Rear window sunshade switch
Switch on ignition (
page 36).
Always raise the sunshade fully for its sup-
port against the window frame.Raising the sunshade
Press switch1 briefly.
The sunshade is raised completely.
Stopping the raising procedure
Press switch1 again.
The sunshade stops.
Lowering the sunshade
Press switch1 briefly.
The sunshade is lowered completely.
Stopping the lowering procedure
Press switch1 again.
The sunshade stops.
!Make sure that the movement of the 
rear window sunshade is not restricted 
by objects on the rear window shelf. 
Otherwise, the sunshade or the objects 
could be damaged.
Warning!
G
When operating the rear window sunshade, 
make sure there is no danger of anyone be-
ing harmed by the raising or lowering 
procedure.
The raising or lowering procedure can be 
immediately halted by briefly pressing the 
switch
1
.
Briefly press switch
1
 again to raise or low-
er the rear window sunshade completely.
Warning!
G
When leaving the vehicle, always remove the 
SmartKey or SmartKey with KEYLESS-GO* 
from the starter switch, take it 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. 
     
        
        Page 195 of 498
193 Controls in detail
Climate control (CLK 320)
Rear passenger compartment adjustable air vents
The air conditioning for the rear passenger 
compartment is controlled via the climate 
control panel (
page 185).The air vents for the rear passenger 
compartment are located in the rear 
center console.
1Thumbwheel for air volume control for 
center air vents
2Left center air vent
3Right center air ventAdjusting air distribution
Push the slide for the left center 
vent2 or right center vent3 to the 
left, right, up or down.
The air flow is directed in the corre-
sponding direction.
Adjusting air volume
Turn thumbwheel1 t o  t h e  l e f t  o r  r i g h t .
The air volume is increased or 
decreased.
iThe temperature at the center air vents 
for the rear passenger 
compartment2 and3 is the same as 
at the dashboard center air vents.
iFor draft-free ventilation, push 
slides2 and3 upward. 
     
        
        Page 208 of 498
206 Controls in detailAutomatic climate control (CLK 500/CLK 55 AMG)Rear passenger compartment adjustable air vents
The air conditioning for the rear passenger 
compartment is controlled via the auto-
matic climate control panel (
page 195).The air vents for the rear passenger 
compartment are located in the rear 
center console.
1Thumbwheel for air volume control for 
center air vents
2Left center air vent
3Right center air ventAdjusting air distribution
Push the slide for the left center 
vent2 or right center vent3 to the 
left, right, up or down.
The air flow is directed in the corre-
sponding direction.
Adjusting air volume
Turn thumbwheel1 t o  t he  l e f t  o r  r i g h t .
The air volume is increased or de-
creased.
iThe temperature at the center air vents 
for the rear passenger 
compartment2 and3 i s  t h e  s a m e  a s  
at the dashboard center air vents.
iFor draft-free ventilation, push 
slides2 and3 upward. 
     
        
        Page 265 of 498

263 Controls in detail
Driving systems
Switching the Parktronic system 
on/off
The Parktronic system can be switched off 
manually.
The Parktronic switch is located in the up-
per part of the center console (
page 27).
1Parktronic switch
2Indicator lamp
Switching off the Parktronic system
Press Parktronic switch1.
Indicator lamp2 comes on.Switching on the Parktronic system
Press Parktronic switch1 again.
Indicator lamp2 goes out.
Parktronic system malfunction
If only the red distance segments illumi-
nate and a acoustic warning sounds, there 
is a malfunction in the Parktronic system. 
The Parktronic system will automatically 
switch off after 20 seconds and the indica-
tor lamp in the Parktronic switch comes 
on. 
Have the Parktronic system checked 
by an authorized Mercedes-Benz 
Center as soon as possible.If only the red distance segments illumi-
nate and no acoustic warning sounds, the 
Parktronic system sensors are dirty or 
there is an interference from other radio or 
ultrasonic signals. The Parktronic system 
will automatically switch off after 20 sec-
onds and the indicator lamp in the Park-
tronic switch comes on.
Switch off the ignition.
Clean the Parktronic system sensors 
(page 350).
Switch on the ignition.
or
Check the Parktronic system operation 
at another location to rule out interfer-
ence from outside radio or ultrasonic 
signals.
iThe Parktronic system is automatically 
switched on when the ignition is 
switched on (
page 36). 
     
        
        Page 278 of 498
276 Controls in detailUseful featuresAshtrays
Center console ashtray
1Cover plate
2Sliding button
3Ashtray insert
Opening ashtray
Briefly press the bottom of cover 
plate1.
The cover plate opens automatically.Removing ashtray insert
Secure vehicle from movement by 
setting the parking brake.
Move the gear selector lever to 
positionN.
Now you have more room to take out 
the insert.
Push sliding button2 to the right.
The ashtray is disengaged and slides a 
short way in direction of arrow3.
Remove the ashtray insert.Reinstalling the ashtray insert
Push the ashtray insert 3 down into 
the retainer until it engages.
Push down cover plate 1 to close the 
ashtray.
The cover plate engages.
Rear seat ashtray
1Button
2Ashtray insert
3Cover
Warning!
G
Remove front ashtray only with vehicle 
standing still. Set the parking brake to se-
cure vehicle from movement. Move gear se-
lector lever to positionN. With gear selector 
lever in positionN, turn off the engine. 
     
        
        Page 362 of 498
360 Practical hintsWhat to do if …?Lamp in center consoleProblem
Possible cause
Suggested solution
56
The front passenger front air bag 
off indicator lamp illuminates 
and remains illuminated with the 
weight of a typical adult or some-
one larger than a small individual 
on the front passenger seat.
The system is malfunctioning.
Have the system checked as soon as 
possible by an authorized 
Mercedes-Benz Center.
Also note any messages in the multi-
function display and follow corrective 
steps (
page 368).
Warning!
G
If the 56 lamp illuminates and re-
mains illuminated with the weight of a typi-
cal adult or someone larger than a small 
individual on the front passenger seat, do 
not have any passenger use the front 
passenger seat until the system has been 
repaired.