Page 201 of 506
200 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 191).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 263 of 506

262 Controls in detailDriving systemsWarning indicators
Visual signals indicate to the driver the rel-
ative distance between the sensors and an
obstacle. The warning indicator for the
front area is located above the center air
vents in the dashboard. The warning indi-
cator for the rear area is integrated be-
tween the rear backrests.
1Left side of the vehicle
2Right side of the vehicle
Each warning indicator is divided into six
yellow and two red distance segments for
either side of the vehicle. The Parktronic
system is ready when the border around
the indicator is illuminated.The position of the gear selector lever de-
termines which warning indicators will be
activated.As your vehicle approaches an object, one
or more distance segments will illuminate,
depending on the distance. When the
eighth distance segment illuminates, you
have reached the minimum distance.
Front area: An intermittent acoustic
warning will sound as the first red dis-
tance segment illuminates and a con-
stant acoustic warning lasting a
maximum of two seconds will sound for
the second red distance segment. The
signal is canceled when the gear selec-
tor lever is placed in positionP.
Rear area: An intermittent acoustic
warning will sound as the first red dis-
tance segment illuminates and a con-
stant acoustic warning lasting a
maximum of two seconds will sound for
the second red distance segment. The
signal is canceled when the gear selec-
tor lever is placed in position DorP.
Gear selector le-
ver position
Warning indicator
D
Front area activated
R or N
Front and rear area
activated
P
Neither activated
Page 272 of 506

271 Controls in detail
Useful features
Storage box
The storage box is in front of the armrest
storage compartment.
1Storage boxOpening storage box
Pull storage box1 in the direction of
arrow.
Closing storage box
Press storage box1 back until it
engages into place.
Armrest in the rear passenger
compartment
Pull the top of the armrest out and fold
it down.Cup holder in the dashboard
Warning!
G
Do not use this storage compartment as an
ashtray and/or place hot cigarettes or other
hot smoking materials in the storage box.
Placing such materials in the storage box
may cause vehicle damage and/or poten-
tially cause a vehicle fire.
Warning!
G
In order to help prevent spilling liquids on
vehicle occupants, only use containers that
fit into the cup holder. Use lids on open
containers and do not fill containers to a
height where the contents, especially hot
liquids, could spill during braking, vehicle
maneuvers, or in an accident.
When not in use, keep the cup holder
closed. An open cup holder may cause injury
to you and others when contacted during
braking, vehicle maneuvers, or in an
accident.
Keep in mind that objects placed in cup
holder may come loose during braking,
vehicle maneuvers, or in an accident and be
thrown around in the vehicle interior.
Objects thrown around in the vehicle
interior may cause an accident and/or
serious personal injury.
Page 306 of 506

305 Operation
Engine compartment
Engine compartment
Hood
Opening
The hood lock release lever is located to
the left of the steering wheel under the
dashboard.
1Hood lock release lever
Pull lever 1 downwards.
The hood is unlocked.
2Lever for opening the hood
Push lever 2 on the hood upwards.
Pull up on the hood and then release it.
The hood will be automatically held
open at shoulder height by gas-filled
struts.
Warning!
G
Do not pull the release lever while the vehi-
cle is in motion. Otherwise the hood could
be forced open by passing air flow.
!To avoid damage to the windshield wip-
ers or hood, never open the hood if the
wiper arms are folded forward away
from the windshield.
Warning!
G
To help prevent personal injury, stay clear of
moving parts when the hood is open and the
engine is running. Make sure the hood is
properly closed before driving. When closing
the hood, use extreme caution not to catch
hands or fingers.
The radiator fan may continue to run for
approximately 30 seconds or even restart
after the engine has been turned off. Stay
clear of fan blades.
Page 474 of 506

473 Index
Convenience submenu 156
Activating
easy-entry/exit feature 156
Setting key-dependency 157
Setting parking position
for exterior rear view mirror 157
Coolant 310, 458
Adding 310
Anticorrosion/
antifreeze quantity 458
Capacities 453
Checking level 310
Messages in display 376
Temperature 301
Temperature indicator 131
Warning lamp 357, 377
Coolant level
Checking 310Cruise control 462
Canceling 257
Driving downhill 257
Driving uphill 257
Fine adjustment 259
Message in display 368
Setting current speed 256
Setting to last stored speed
(“Resume” function) 259
Cruise control
CLK 320 / CLK 55 AMG 255
Cruise control lever 255
Cruise control lever
CLK 320 / CLK 55 AMG 255
Cup holder
Cleaning 351
Closing 272
In the dashboard 271
Opening 272
Curb weight 336
Customer Assistance Center (CAC) 461D
Date (day)
Setting 150
Date (month)
Setting 149
Date (year)
Setting 151
Daytime running lamp mode 124
Setting 152
Deactivating
Air conditioning (cooling) 188, 198
Air recirculation mode 187, 196
Alarm 90
Anti-theft alarm system 90
Automatic climate control* 191
Central locking (control system) 155
Charcoal filter 197
Climate control 181
Climate control system 183
Defrost 195
Defrosting 185
Engine with KEYLESS-GO* 57
Engine with the SmartKey 56
ESP 87
Exterior lamps 123
Hazard warning flasher 128