Page 10 of 498

ContentsBattery ...............................................  420
Disconnecting the battery ............  421
Removing the battery ...................  421
Charging and reinstalling battery .  422
Reconnecting the battery .............  422
Jump starting .....................................  423
Towing the vehicle .............................  425
Towing the vehicle........................  425
Installing towing eye bolt..............  427
Fuses .................................................  429
Aids for changing fuses ................  430
Main fuse box in passenger 
compartment................................  430
Fuse box in engine compartment .  431
Fuse box in trunk..........................  432
Technical data.................................  433
Parts service ......................................  434
Warranty coverage.............................  435
Loss of Service and Warranty 
Information Booklet .....................  435
Identification labels ...........................  436
Layout of poly-V-belt drive .................  437
CLK 320/CLK 500/CLK 55 AMG.  437
Engine................................................  438
Rims and tires....................................  439
Same size tires .............................  440
Mixed size tires ............................  441
Minispare wheel 
(except CLK 55 AMG)...................  443
Collapsible tire 
(CLK 55 AMG only).......................  443
Electrical system ...............................  444
Main dimensions ...............................  445
Weights..............................................  446Fuels, coolants, lubricants, etc. .........  447
Capacities ....................................  447
Engine oils ...................................  449
Engine oil additives ......................  449
Air conditioning refrigerant ..........  450
Brake fluid....................................  450
Premium unleaded gasoline .........  450
Fuel requirements ........................  451
Gasoline additives ........................  451
Coolants ......................................  452
Windshield washer system and 
headlamp cleaning system*.........  454
Technical terms...............................  455Index.................................................  461 
     
        
        Page 356 of 498

354 Practical hintsWhat to do if …?Lamps in instrument clusterGeneral information:
If any of the following lamps in the instru-
ment cluster fails to come on during thebulb self-check when switching on ignition, 
have the respective bulb checked and re-
placed if necessary.Problem
Possible cause
Suggested solution
-
The yellow ABS malfunction 
indicator lamp comes on while 
driving.
The ABS has detected a malfunction and has 
switched off. The BAS and the ESP are also 
switched off (see messages in display).
The brake system is still functioning normally 
but without the ABS available.
Continue driving with added caution. 
Wheels will lock during hard braking, 
reducing steering capability. 
Have the system checked at an autho-
rized Mercedes-Benz Center as soon 
as possible.
Failure to follow these instructions in-
creases the risk of an accident.
Read and observe messages in the 
display (
page 364).
The charging voltage has fallen below 
10 volts. The ABS has switched off.
When the voltage is above this value 
again, the ABS is operational again.
If necessary, have the generator (al-
ternator) and battery checked. 
     
        
        Page 367 of 498
365 Practical hints
What to do if …?
Display
Display message
Possible cause
Possible solution
ABS
Anti-lock
braking system
not working!
The charging voltage has fallen below 
10 volts and the ABS has switched off.
The brake system is still functioning nor-
mally but without the ABS available.
When the voltage is above this value 
again, the ABS is operational again.
Continue driving with added caution. 
Wheels will lock during hard braking, 
reducing steering capability.
Have the system checked at an autho-
rized Mercedes-Benz Center as soon 
as possible.
Failure to follow these instructions in-
creases the risk of an accident. 
     
        
        Page 368 of 498

366 Practical hintsWhat to do if …?Display
Display message
Possible cause
Possible solution
BAS
malfunction
Visit workshop
The BAS has detected a malfunction and 
switched off.
Continue driving with added caution.
Have the system checked at an autho-
rized Mercedes-Benz Center as soon 
as possible.
Failure to follow these instructions in-
creases the risk of an accident.
Display defective
Visit workshop!
BAS or the BAS display is malfunctioning.
Continue driving with added caution.
Have the system checked at an autho-
rized Mercedes-Benz Center as soon 
as possible.
Failure to follow these instructions in-
creases the risk of an accident.
unavailable
See Operator’s Manual
The charging voltage has fallen below 
10 volts and the BAS has switched off.
The brake system is still functioning nor-
mally but without the BAS available.
When the voltage is above this value 
again, the BAS is operational again.
Have the system checked at an autho-
rized Mercedes-Benz Center as soon 
as possible.
Failure to follow these instructions in-
creases the risk of an accident. 
     
        
        Page 369 of 498

367 Practical hints
What to do if …?
Display
Display message
Possible cause
Possible solution
Cruise Con-
trol
Cruise control
Drive to workshop
Cruise control is malfunctioning.
Have cruise control checked by an au-
thorized Mercedes-Benz Center.
ESP
malfunction
Visit workshop
The ESP was deactivated because of a 
malfunction or interrupted power supply. 
The ABS might not be operational.
Continue driving with added caution.
Visit an authorized Mercedes-Benz 
Center as soon as possible.
Failure to follow these instructions in-
creases the risk of an accident.
Display defective
Visit workshop!
The ESP or the ESP display is malfunction-
ing.
Continue driving with added caution.
Visit an authorized Mercedes-Benz 
Center as soon as possible.
Failure to follow these instructions in-
creases the risk of an accident.
unavailable
See Operator’s Manual
The charging voltage has fallen below 
10 volts and the ESP has switched off.
When the voltage is above this value 
again, the ESP is operational again.
If necessary, have the generator (al-
ternator) and battery checked.
The self-diagnosis has not been complet-
ed.
The display will clear after driving a short 
distance at more than 12 mph (20 km/h). 
     
        
        Page 375 of 498
373 Practical hints
What to do if …?
Symbol messagesDisplay symbol
Display message
Possible cause
Possible solution
#
Visit Workshop!
The battery is no longer charging.
Possible causes:
broken poly-V-belt
alternator malfunctioning
Stop immediately and check the 
poly-V-belt.
If it is broken:
Do not continue to drive. Otherwise 
the engine will overheat due to an 
inoperative water pump which may 
result in damage to the engine. Notify 
an authorized Mercedes-Benz Center.
If it is intact:
Drive immediately to the nearest 
authorized Mercedes-Benz Center.
Undervoltage
Charge battery
The battery has insufficient voltage.
Start the engine (
page 46).
Undervoltage
Switch off
consumers
The battery has insufficient voltage.
Turn off unnecessary electrical con-
sumers. 
     
        
        Page 424 of 498

422 Practical hintsBatteryCharging 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.
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 cover 2.
Connect the battery negative lead.
Reinstall the filter box (
page 420).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. Gases may escape during charg-
ing and cause explosions that may result in 
paint damage, corrosion or personal injury.
!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 151) (vehi-
cles with COMAND*: see COMAND 
operator’s manual).
Resynchronize the side windows 
(page 250).
Resynchronize the tilt/sliding 
sunroof* (
page 254). 
     
        
        Page 466 of 498

464 IndexBattery, vehicle 314, 420
Charging 422
Disconnecting 421
Messages in display 373
Reconnecting 422
Reinstalling 422
Removing 421
Bead 338
Bi-Xenon headlamps* 455
Block heater (Canada only) 343
Blocking
Rear window operation 82
Bolts
For spare wheel 396
Brake assist system (BAS) 455
Brake fluid 450
Message in display 374
Brake lamp bulbs 405
Brake lamp, high mounted 405
Brake pads
Message in display 374
Brakes 296
Warning lamp 355
Break-in period 294Bulbs, replacing 404
Additional turn signals 404
Backup lamps 405
Brake lamps 405
Fog lamps 404
Front lamps 404
High beam (Bi-Xenon*) 404
High beam (Halogen) 404
High beam flasher (Bi-Xenon*) 404
High beam flasher (Halogen) 404
High mounted brake lamp 405
License plate lamps 405, 410
Low beam (Bi-Xenon*) 404
Low beam (Halogen) 404
Parking lamps 404, 405, 407, 409
Rear fog lamp 405, 410
Side marker lamps 404, 409
Standing lamps 404, 405, 407, 409
Tail lamp assemblies 405, 410
Turn signal lamps 404, 405
Button
Audio system 210C
CAC (Customer Assistance Center) 455
Calling up
Maintenance service indicator 345
Range (distance to empty) 162
CAN system 455
Canceling
Cruise control 257
Capacities
Fuels, coolants, lubricants, etc. 447
Cargo tie-down rings 271
Catalytic converter 303
CD changer* 225
CD operation 225
CD player
Operating 144
Center console 27
Front passenger front 
air bag off indicator lamp 360
Lower part 28
Upper part 27
Centigrade
Setting temperature units 149