Page 428 of 506
427 Practical hints
Battery
Battery
The battery is located in the engine
compartment on the right hand side.
1Clamps
Removing filter box:
Release clamps1.
Remove filter box.
Installing filter box:
Insert filter box properly.
Secure it with clamps1.
Warning!
G
Failure to follow these instructions can re-
sult in severe injury or death.
Observe all safety instructions and
precautions when handling automotive
batteries (
page 311).
Never lean over batteries while connecting,
you might get injured.
Battery fluid contains sulfuric acid. Do not
allow this fluid to come in contact with eyes,
skin or clothing. In case it does, immediately
flush affected area with water and seek
medical help if necessary.
A battery will also produce hydrogen gas,
which is flammable and explosive. Keep
flames or sparks away from battery, avoid
improper connection of jumper cables,
smoking etc.
!Never loosen or detach battery termi-
nal clamps while the engine is running
or the SmartKey is in the starter switch.
Otherwise the alternator and other
electronic components could be se-
verely damaged.
Have the battery checked regularly by
an authorized Mercedes-Benz Center.
Refer to Maintenance Booklet for
maintenance intervals or contact an
authorized Mercedes-Benz Center for
further information.Warning!
G
Do not place metal objects on the battery as
this could result in a short circuit.
Use leak-proof battery only to avoid the risk
of acid burns in the event of an accident.
Page 429 of 506
428 Practical hintsBattery2Negative terminal
3Positive terminal cover
Disconnecting the battery
Turn off the engine (
page 56).
Turn off all electrical consumers.
Remove SmartKey from starter switch.
Vehicles with KEYLESS-GO*:
Press the start / stop button until
the engine shuts off.
Open the driver’s door.
Open the hood (
page 305).
Remove the filter box (
page 427).
Read and observe safety instructions
and precautions (
page 427).
Disconnect the battery negative lead
from negative terminal2.
Remove cover3 from the positive ter-
minal.
Disconnect the battery positive lead.
Removing the battery
Remove the screw securing the
battery.
Remove the battery support and
bracket.
Take out the battery.
Charging and reinstalling battery
Charge battery in accordance with the
instructions of the battery charger
manufacturer.
Reinstall the charged battery. Follow
the previously described steps in
reverse order.
Warning!
G
With a disconnected battery
you will no longer be able to turn the
SmartKey in the starter switch and
pressing the KEYLESS-GO* start/stop
button on the gear selector lever will
have no effect
the gear selector lever will remain
locked in position
P
Page 430 of 506
429 Practical hints
Battery
Reconnecting the battery
Turn off all electrical consumers.
Remove SmartKey from starter switch.
Vehicles with KEYLESS-GO*:
Press the start / stop button until
the engine shuts off.
Open the driver’s door.
Connect the battery positive lead and
fasten its cover3.
Connect the battery negative lead2.
Reinstall the filter box (
page 427).Batteries contain materials that can harm
the environment if disposed of improperly.
Large 12-volt storage batteries contain
lead. Recycling of batteries is the preferred
method of disposal. Many states require
sellers of batteries to accept old batteries
for recycling.
Warning!
G
Never charge a battery while still installed in
the vehicle unless the accessory battery
charge unit* approved by Mercedes-Benz is
being used. Gases may escape during charg-
ing and cause explosions that may result in
paint damage, corrosion or personal injury.
An accessory battery charge unit* specially
adapted for Mercedes-Benz vehicles and
tested and approved by Mercedes-Benz is
available, permitting the charging of the bat-
tery in its installed position. Contact an au-
thorized Mercedes-Benz Center for
information and availability. Charge battery
in accordance with the separate instruc-
tions for the accessory battery charger*.
!NEVER invert the terminal connections!!The battery, its filler caps and the vent
tube must always be securely installed
when the vehicle is in operation.
iThe following procedures must be car-
ried out following any interruption of
battery power (e.g. due to reconnect-
ing):
Set the clock (
page 147) (vehi-
cles with COMAND*: see COMAND
operator’s manual).
Resynchronize the side windows
(page 243).
Page 435 of 506
434 Practical hintsTowing the vehicle
Installing towing eye bolt
Towing eye bolt CLK 320/CLK 500
1Cover on right side of front bumper2Cover on right side of rear bumper
To remove cover:
Press mark on cover in direction of ar-
row.
Lift cover off to reveal threaded hole for
towing eye bolt.
The towing eye bolt is supplied with the
tool kit (located in the compartment under-
neath the trunk floor).
Screw towing eye bolt to its stop and
tighten with lug wrench.
To reinstall cover:
Fit cover and snap into place.
iIf the battery is disconnected or
discharged
the SmartKey will not turn in the
starter switch. For more informa-
tion, see “Battery” (
page 427)
and “Jump starting” (page 430).
the gear selector lever will remain
locked in positionP. For informa-
tion on manually unlocking the
transmission gear selector lever,
see (
page 400).
Page 470 of 506
469 Index
Automatic climate control 190
Activating 191
Adjusting air distribution 194
Air recirculation mode 195
Deactivating 191
Defrosting 195
Rear window defroster 179
Setting the temperature 193
Automatic headlamp mode 123
Automatic lighting control
Activating 128
Deactivating 129
Automatic locking when driving 110
Automatic shift program 169Automatic transmission 163
Accelerator position 170
Comfort program mode 169
Emergency operation
(Limp Home Mode) 175
Fluid level 309
Gear ranges 166
Gear selector lever 163
Gear selector lever position 163, 167
Gear shifting malfunctions 175
Kickdown 170
Manual shifting 165
One-touch gearshifting 165
Program mode selector switch 169
Starting the engine 47
Transmission fluid 309
Auxiliary fuse box 438B
Backup lamps 415, 420
Bulbs 415
Bar 336
BAS 85, 461
Messages in display 367
Batteries, SmartKey
Check lamp 97, 103
Checking 97, 103
Replacing 412
Batteries, SmartKey with KEYLESS-GO*
Check lamp 97, 103
Checking 97, 103
Replacing 413
Battery discharged
Jump starting 430
Battery, vehicle 311, 427
Charging 428
Disconnecting 428
Messages in display 374
Reconnecting 429
Reinstalling 428
Removing 428
Bead 336
Bi-Xenon headlamps* 461
Block heater* 341
Page 472 of 506
471 Index
Central locking
Automatic 110
From inside 110
Locking from inside 110
Switch 110
Switching on/off
(control system) 155
Unlocking from inside 110
Central locking switch 110
Certification label 442
Changing
CDs 218
Key setting 156
Charcoal filter 197
Activating 197
Deactivating 197
Charging
Vehicle battery 428
CHECK ENGINE
malfunction indicator lamp 356
Checking
Coolant level 310
Oil level 304, 307
Tire inflate pressure 304
Vehicle lighting 304Child safety 72
Air bags 62
Front passenger front
air bag off indicator lamp 79
Infant and child
restraint systems 67, 72
LATCH child seat anchors 80
OCS 75
Child safety switch see
Blocking of rear window operation
Child seat anchors see
LATCH child seat anchors
Cigarette lighter 274Cleaning 345
Cup holder 351
Gear selector lever 351
Hard plastic trim items 351
Headlamps 176
Headliner 351
Instrument cluster 351
Leather upholstery 352
Light alloy wheels 350
Nubuck leather upholstery
(CLK 55 AMG) 352
Parktronic system* sensor 349
Plastic and rubber parts 352
Seat belts 351
Soft top 347
Steering wheel 351
Upholstery 352
Windows 350
Windshield 53
Wiper blades 349
Wood trims 352
Cleaning and care of vehicle 345
Cleaning tires 315
Climate control 180
Clock 25, 148
Page 481 of 506
480 IndexLamps, indicator and warning
ABS 354
Battery (SmartKey) 96, 102
Brakes 355
Center console 361
CHECK ENGINE 356
Coolant 357, 376
Engine diagnostics 356
ESP 358
Front passenger front
air bag off indicator lamp 66, 361
Fuel reserve 359
Instrument cluster 354–360
Maintenance service indicator 342
Parktronic system*
warning indicators 262
Roll bar 359
Seat belts 359
SRS 61, 360
Turn signals 25
Language
Multifunction display 146
Setting 146
LATCH child seat anchors 80
Folding back 81Layout of poly-V-belt drive 443
Leather upholstery
Cleaning 352
Lever
For cruise control 255
License plate lamps
Messages in display 384
Replacing bulbs 415, 420
Light alloy wheels
Cleaning 350
Technical data 446
Light sensor 384
Lighter see Cigarette lighterLighting 122
Automatic headlamp mode 123
Combination switch 126
Daytime running lamp mode 124
Door entry lamps 129
Exterior lamp switch 122
Front fog lamps 125
High beam flasher 126
High beams 126
Instrument cluster illumination 130
Interior 128
Locator lighting 124
Low beam 122
Manual headlamp mode 123
Night security illumination 124
Parking lamps 122
Rear fog lamp 125
Settings (control system) 151
Limiting the gear range 166
Limp Home Mode 175
Loading 264
Instructions 268
Ski sack* 264
Loading terminology 335
Loading the vehicle 316
Page 483 of 506
482 IndexMenus 134
AUDIO 139
Control system 463
In control system 136, 137
NAV 141
Settings menu 142
Standard display 138
Submenus 135
TEL* 160
Trip computer 158
Vehicle status message memory 141
Microphone
Hands-free microphone 29
Miles/kilometers in speedometer
Setting 145
Minispare wheel 394
Mounting 423
Removing 394
Storing 395
Technical data 449
Wheel bolts 396Mirrors
Activating exterior rear
view mirror parking position 177
Adjusting 41
Auto-dimming for
rear view mirror 176
Exterior rear view mirror 41
Exterior rear view
mirror parking positions 157
Interior rear view mirror 41
Storing exterior rear view
mirror parking position 121
MON 303
MON (Motor Octane Number) 463
Mph or km/h in speedometer 145
Multicontour seat* 116
Multifunction display 133, 463
Displaying gear range 166
Selecting language 146
Setting date (day) 150
Setting date (month) 149
Setting date (year) 151
Standard display 137Multifunction display messages
ABS 366
BAS 367
Battery 374
Brake fluid 375
Brake pads 375
Check engine 356
Coolant 377
Coolant level 376
Cruise control 368
Display 379
Doors 379
Engine 356
Engine oil 380
ESP 368
Fog lamps, front 383
Fuel cap 356
Fuel reserve tank 382
High beam headlamps 384
Hood 382
Key 382
Lamp sensor 384
Lamps 384
License plate lamp 384
Low beam 384
Parking brake 375
