Page 9 of 489

ContentsTowing the vehicle ............................. 432
Towing the vehicle........................ 432
Installing towing eye bolt.............. 434
Fuses ................................................. 436
Aids for replacing fuses ................ 436
Main fuse box in passenger
compartment................................ 437
Fuse box in engine compartment . 437
Fuse box in trunk.......................... 438
Technical data................................. 439
Parts service ...................................... 440
Warranty coverage............................. 441
Loss of Service and Warranty
Information Booklet ..................... 441
Identification labels ........................... 442
Layout of poly-V-belt drive ................. 443
CLK 350 ....................................... 443
CLK 500 ....................................... 443
Engine................................................ 444
Rims and tires.................................... 445
Same size tires ............................. 447
Mixed size tires ............................ 448
Minispare wheel ........................... 449
Electrical system ............................... 450
Main dimensions and weights............ 451
Main dimensions .......................... 451
Weights ........................................ 451Fuels, coolants, lubricants, etc. ......... 452
Capacities .................................... 452
Engine oils ................................... 454
Engine oil additives ...................... 454
Air conditioning refrigerant .......... 454
Brake fluid.................................... 454
Premium unleaded gasoline ......... 455
Fuel requirements ........................ 455
Gasoline additives ........................ 456
Coolants ...................................... 457
Windshield washer system and
headlamp cleaning system*......... 459
Technical terms............................... 461Index................................................. 467
Page 308 of 489

307 Operation
At the gas station
Check regularly and before a long tripEngine compartment (CLK 500, example)1Coolant level
2Brake fluid (fuse box cover removed)
3Windshield washer and headlamp
cleaning system*Coolant
For normal replenishing, use water (pota-
ble water quality). For more information,
see “Coolant” (
page 314) and see “Fu-
els, coolants, lubricants, etc.”
(
page 452).
Brake fluid
Removing fuse box cover,
see (page 437).Windshield washer and headlamp
cleaning system*
For more information on filling up the
washer reservoir, see “Windshield washer
system and headlamp cleaning system*”
(
page 316).
Engine oil level
For more information on engine oil, see
“Engine oil” (
page 309).
Vehicle lighting
Check function and cleanliness. For more
information on replacing light bulbs, see
“Replacing bulbs” (
page 412).
For more information, see “Exterior lamp
switch” (
page 52).
Tire inflation pressure
For more information, see “Checking tire
inflation pressure” (
page 328).
iOpening the hood, see (
page 308).
!If you find that the brake fluid in the
brake fluid reservoir has fallen to the
minimum mark or below, have the
brake system checked for brake pad
thickness and leaks immediately.
Notify an authorized Mercedes-Benz
Center immediately. Do not add brake
fluid as this will not solve the problem.
For more information, see also “Practi-
cal hints” (
page 361).
Page 351 of 489

350 OperationMaintenance
Resetting the maintenance service indicator
In the event that the maintenance service
on your vehicle is not carried out by an
authorized Mercedes-Benz Center, you can
have the maintenance service indicator
reset. The automotive maintenance facility
carrying out the maintenance service will
find the information for resetting the
maintenance service indicator in the
maintenance-relevant information for your
vehicle. Such information is available from
either your authorized Mercedes-Benz
Center or directly from Mercedes-Benz.
iIf the battery is disconnected, the days
of disconnection will not be included in
the count shown by the maintenance
service indicator. To arrive at the true
maintenance service deadline, you will
need to subtract these days from the
days shown in the maintenance service
indicator message or maintenance ser-
vice indicator display.
Do not confuse the maintenance
service indicator with the engine oil
level indicator:.
iIf the maintenance service indicator
was inadvertently reset, have an
authorized Mercedes-Benz Center
correct it.
Only reset if the proper maintenance
service has been performed. Resetting
the system without performing the
proper service as called for by the
maintenance service indicator will
result in engine damage and/or other
vehicle damage not covered by the
Mercedes-Benz Limited Warranty.
Page 354 of 489

353 Operation
Vehicle care
Use the appropriate MB-Touch-Up
Stick for quick and provisional repairs
of minor paint damage (i.e. chips from
stones, vehicle doors, etc.).
Engine cleaning
Prior to cleaning the engine compartment,
make sure to protect electrical compo-
nents and connectors from contact with
water and cleaning agents.
Corrosion protection, such as MB Anticor-
rosion Wax, should be applied to the
engine compartment after every engine
cleaning. Before applying, all control
linkage bushings and joints should be
lubricated. The poly-V-belt and all pulleys
should be protected from any wax. Vehicle washing
In the winter, thoroughly remove all traces
of road salt as soon as possible.
When washing the vehicle underbody, do
not forget to clean the inner sides of the
wheels.Hand-wash
Do not use hot water or wash your vehicle
in direct sunlight.
Only use a mild car wash detergent,
such as Mercedes-Benz approved Car
Shampoo.
Thoroughly spray the vehicle with a dif-
fused jet of water.
Direct only a very weak spray towards
the ventilation intake.
Use plenty of water and rinse the
sponge and chamois frequently.
Rinse with clean water and thoroughly
dry with a chamois.
Do not allow cleaning agents to dry on
the finish.
iVehicles with KEYLESS-GO*:
If a door handle is hit by a strong jet of
water, and a SmartKey with
KEYLESS-GO* is in close proximity, i.e.
within approximately 3 ft
(approximately 1 m), the vehicle could
be inadvertently locked or unlocked.
Page 360 of 489
359 Practical hints
What to do if …?
Where will I find...?
Unlocking/locking in an emergency
Opening/closing in an emergency
Resetting activated head restraints
Replacing SmartKey batteries
Replacing bulbs
Replacing wiper blades
Flat tire
Battery
Jump starting
Towing the vehicle
Fuses
Page 399 of 489
398 Practical hintsWhere will I find...?First aid kit
The first aid kit is located in the trunk on
the left side secured by a hook and loop
fastener.
Loosen hook and loop fastener.
Remove first aid kit.
Vehicle tool kit
The vehicle tool kit is located in the storage
compartment underneath the trunk floor.
The following is included:
Towing eye bolt
Wheel wrench
Alignment bolt
Vehicle jack
Collapsible wheel chock
Spare fuses
A pair of gloves
The spare wheel bolts are fixed at the
Minispare wheel.Removing the vehicle tool kit
Lift up trunk floor cover and engage
trunk floor handle in upper edge of
trunk.
1Retaining screw
2Storage well casing
Loosen retaining screw1 in the mid-
dle of storage well casing by turning it
counterclockwise.
Remove storage well casing2.
iCheck expiration dates and contents
for completeness at least once a year
and replace missing/expired items.
Page 437 of 489

436 Practical hintsFusesFuses are designed to protect the electri-
cal circuits in your vehicle from a short cir-
cuit. If a fuse is blown, the component(s)
and systems secured by that fuse will stop
operating.
The following aids are available to help you
replace fuses (
page 436):
Fuse chart
Spare fuses
Fuse extractor
The electrical fuses are located in different
fuse boxes:
Main fuse box in passenger
compartment (
page 437)
Fuse box in engine compartment
(page 437)
Fuse box in trunk (
page 438)
Aids for replacing fuses
Fuse chart
The fuse chart is located in the main fuse
box in the passenger compartment
(page 437). The amperages of the fuses
are also given there.
Spare fuses
Spare fuses are located in the vehicle tool
kit in the spare wheel well (
page 399).
Fuse extractor
The fuse extractor is located in the cover of
the auxiliary fuse box in the trunk
(
page 438).
Warning!
G
Only use fuses approved for Mercedes-Benz
with the specified amperage for the system
in question. Using other fuses may cause an
overload leading to a fire, and/or cause
damage to electrical components and/or
systems.
!Never attempt to repair or bridge a
blown fuse. Have the cause determined
and remedied by an authorized
Mercedes-Benz Center.!Keep the fuse boxes free by contamina-
tion and wetness. Otherwise, electrical
parts or systems could be damaged.
Page 438 of 489
437 Practical hintsFuses
Main fuse box in passenger compartment
The main fuse box is located in the passen-
ger compartment on the driver’s side of
the cockpit.
1Main fuse box coverOpening fuse box
Open the driver’s door.
Insert flat, blunt object as a lever into
the edge of the fuse box cover1 at
the position indicated by the arrow.
Loosen fuse box cover1 from cockpit
using lever.
Using your hands, remove fuse box
cover1 rearward.
Closing fuse box
Attach fuse box cover1 in the front.
Fold fuse box cover1 in until it
engages.
Fuse box in engine compartment
The fuse box is located in the engine com-
partment on the driver’s side.
1Cover
2Screw
3Retainer
Removing cover
Twist screws2 90° counterclock-
wise.
Lift the rear of cover1.
Slide out retainer3 and remove
cover1 by pulling towards front.
!Do not use sharp objects such as a
screw driver to open the fuse box
cover1 in the cockpit, as this could
damage it.