Page 5 of 498

Contents
Introduction.......................................... 9
Product information ................................ 9
Operator’s Manual ...............................  10
Service and warranty information ..  10
Important notice for California 
retail buyers and lessees of 
Mercedes-Benz automobiles ..........  11
Maintenance ..................................  12
Roadside Assistance ......................  12
Change of address or ownership....  12
Operating your vehicle 
outside the USA or Canada ............  13
Where to find it ....................................  14
Symbols ...............................................  15
Operating safety ..................................  16
Proper use of the vehicle ...............  16
Problems with your vehicle ..................  17
Reporting safety defects......................  18
Reporting safety defects ................  18
Vehicle data recording.........................  19
Information regarding electronic 
recording devices...........................  19
At a glance.......................................... 21
Cockpit ................................................. 22
Instrument cluster ................................ 24
Multifunction steering wheel ................ 26
Center console ..................................... 27
Upper part ...................................... 27
Lower part ...................................... 28
Overhead control panel ........................ 29
Door control panel................................ 30
Getting started...................................  31
Unlocking .............................................  32
Unlocking with the SmartKey .........  32
Unlocking with KEYLESS-GO*.........  33
Starter switch positions ..................  34
Adjusting ..............................................  37
Seats ..............................................  37
Steering wheel ................................  40
Mirrors ............................................  41
Driving ..................................................  43
Fastening the seat belts .................  43
Starting the engine .........................  46
Switching on headlamps .................  50
Turn signals ....................................  51
Windshield wipers ...........................  52
Problems while driving....................  54
Parking and locking ..............................  55
Parking brake .................................  55
Switching off headlamps.................  56
Turning off the engine .....................  56 
     
        
        Page 9 of 498

Contents
Uniform Tire Quality Grading 
Standards (U.S. vehicles) .............  336
Tire ply material ...........................  337
Tire and loading terminology ........  338
Rotating tires ...............................  341
Winter driving ....................................  342
Winter tires ..................................  342
Block heater (Canada only) ..........  343
Snow chains.................................  343
Maintenance......................................  344
Clearing the maintenance 
service indicator...........................  345
Maintenance 
service term exceeded .................  345
Calling up the 
maintenance service indicator .....  345
Resetting the 
maintenance service indicator .....  346
Vehicle care .......................................  347
Cleaning and care of vehicle ........  347
Practical hints.................................. 353
What to do if …? ................................. 354
Lamps in instrument cluster ......... 354
Lamp in center console................. 360
Vehicle status messages 
in the multifunction display........... 362
Where will I find...? ............................. 389
First aid kit.................................... 389
Vehicle tool kit .............................. 389
Minispare wheel 
(except CLK 55 AMG) ................... 393
Collapsible tire 
(CLK 55 AMG only) ....................... 394
Spare wheel bolts ......................... 396
Unlocking/locking in an emergency... 397
Unlocking the vehicle.................... 397
Locking the vehicle ....................... 398
Fuel filler flap ................................ 399
Manually unlocking 
the gear selector lever .................. 400Opening/closing in an emergency .....  401
Power tilt/sliding sunroof* ...........  401
Replacing batteries in the SmartKey/ 
SmartKey with KEYLESS-GO*.............  402
SmartKey ......................................  402
SmartKey with KEYLESS-GO* .......  403
Replacing bulbs ..................................  404
Bulbs............................................. 404
Replacing bulbs for front lamps .... 406
Replacing bulbs for rear lamps .....  410
Replacing wiper blades ......................  411
Removing wiper blades .................  411
Installing wiper blades ..................  411
Flat tire...............................................  412
Preparing the vehicle .................... 412
Mounting the spare wheel ............ 413 
     
        
        Page 23 of 498
21 At a glance
Cockpit
Instrument cluster
Multifunction steering wheel
Center console
Overhead control panel
Door control panel 
     
        
        Page 25 of 498
23 At a glance
Cockpit
Item
Page
1
Steering wheel gearshift 
buttons 
(CLK 500, CLK 55 AMG)
172
2
Combination switch
Turn signals
Windshield wipers
High beam
51
52
51
3
Cruise control lever
255
4
Multifunction steering 
wheel
26,
138
5
Instrument cluster
24,
134
6
Lever for voice control 
system*, see separate op-
erating instructions
7
Starter switch
34
8
Front Parktronic* warning 
indicator
262
Item
Page
9
Overhead control panel
29
a
Glove box
272
b
Cup holder
275
c
Center console
27, 28
d
Hood lock release
308
e
Horn
f
Steering wheel adjustment 
stalk
40
g
Parking brake pedal
49
h
Door control panel
30
j
Parking brake release
49
k
Exterior lamp switch
50,
124
l
Exterior rear view mirror 
adjustment
41
m
Headlamp washer switch*
178 
     
        
        Page 29 of 498
27 At a glance
Center console
Center console
Upper part
Item
Page
1
Seat heater*, driver’s side
Seat ventilation*, driver’s 
side
119
2
Parktronic (Parking as-
sist)* deactivation switch
263
3
Rear window sunshade* 
switch
182
4
ESP control switch
86
5
Hazard warning flasher 
switch - switching on/off
131
6
Central locking switch
Central unlocking switch
110
7
Switch for folding down 
rear seat head restraints
116
8
Tow-away alarm switch
Anti-theft alarm system in-
dicator lamp
91
92
Item
Page
9
Seat heater*, passenger 
side
Seat ventilation*, 
passenger side
119
a
Front passenger front air 
bag off indicator lamp 
77,
360
b
Audio system,
or
COMAND* (see separate 
operating instructions)
143
c
Climate control (CLK 320)
Automatic climate control 
(CLK 500, CLK 55 AMG)
Rear window defroster 
184
194
183 
     
        
        Page 30 of 498
28 At a glanceCenter consoleLower part
Item
Page
1
Ashtray
Cigarette lighter
276
277
2
KEYLESS-GO* start/stop 
button
35
3
Storage compartment
273
4
Program mode selector 
switch for automatic trans-
mission
Automatic shift 
program
Manual shift program 
(CLK 55 AMG)
170
176
5
Gear selector lever for 
automatic transmission
166 
     
        
        Page 68 of 498
66 Safety and SecurityOccupant safetyThe front passenger front air bag will only 
be deployed if:
the system, based on OCS weight sen-
sor readings, senses that the front pas-
senger seat is occupied
the 56 indicator lamp in the 
center console is not lit (
page 77).
the impact exceeds a preset deploy-
ment thresholdSide impact air bags, window curtain 
air bags
1Front side impact air bags
2Rear side impact air bags
3Window curtain air bagThe side impact air bags and window cur-
tain air bags are deployed:
on the impacted side of the vehicle
in impacts exceeding a preset deploy-
ment threshold
independently of the front air bags
The side impact air bags and window cur-
tain air bags are not deployed in impacts 
which do not exceed the system’s deploy-
ment threshold.
The front passenger side impact air bag 
will only deploy if the system senses that 
the front passenger seat is occupied. 
     
        
        Page 79 of 498

77 Safety and Security
Occupant safety
The 56indicator lamp is located in 
the center console.
1Front passenger front air bag off 
indicator lamp
The 56indicator lamp1 will be 
illuminated, except with the SmartKey 
removed or in starter switch position0.
iDeployment of the driver front air bag 
does not mean that the front passenger 
front air bag also should have de-
ployed.
The Occupant Classification System 
(page 73) may have determined: 
that the seat was empty or occu-
pied by the weight up to or less than 
that of a typical 12-month-old child 
seated in a standard child restraint 
- both instances where the system 
suppresses deployment of the front 
passenger front air bag even 
though the impact met the criteria 
and was of sufficient severity to de-
ploy the driver front air bag. 
that the seat was occupied by a 
small individual (such as a young 
teenager or a small adult) or a child 
weighing more than the weight of a 
typical 12-month-old child in a stan-
dard child restraint - instances 
where the system may suppress 
deployment of the front passenger 
front air bag even though the 
impact met the criteria and was of 
sufficient severity to deploy the 
driver front air bag.