Page 429 of 481

428 Practical hints
Towing the vehicle
Warning!G
With the engine not running, there is no
power assistance for the brake and steering
systems. In this case, it is important to keep
in mind that a considerably higher degree of
effort is necessary to brake and steer the ve-
hicle. Adapt your driving accordingly.
iTo signal turns while being towed with the
hazard warning flasher in use, switch on the igni-
tion and activate the combination switch for the
left or right turn signal in the usual manner – only
the selected turn signal will operate.
Upon canceling the turn signal, the hazard warn-
ing flasher will operate again.
!When towing the vehicle with all wheels on
the ground, please note the following:
With the automatic central locking activated and
the SmartKey in starter switch position2, or
KEYLESS-GO* start/stop button in position2,
the vehicle doors lock if the left front wheel as
well as the right rear wheel are turning at vehicle
speeds of approx. 9 mph (15 km / h) or more.
To prevent the vehicle door locks from locking,
deactivate the automatic central locking
(
page 162).
Towing of the vehicle should only be done using
the properly installed towing eye bolt. Never at-
tach tow cable, tow rope or tow rod to the vehi-
cle chassis, frame or suspension parts.
iIf the battery is disconnected or discharged
the SmartKey will not turn in the starter
switch. For more information, see “Battery”
(
page 421) and “Jump starting”
(
page 425).
the gear selector lever will remain locked in
positionP. For information on manually un-
locking the transmission gear selector lever,
see (
page 401).
Page 430 of 481
429 Practical hints
Towing the vehicle
Installing towing eye bolt
Towing eye bolt CLK 350
1Cover on right side of front bumper2Cover on right side of rear bumper
To remove cover:
Press mark on cover 1 or 2.
Lift cover off to reveal the 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 in to its stop and
tighten with lug wrench.
To reinstall cover:
Fit cover 1 or 2 and snap into place.
Page 431 of 481

430 Practical hints
Towing the vehicle
Towing eye bolt CLK 550
Towing eye bolt in front bumper
The cover for the towing eye bolt in the
front bumper is identical to the cover on
the CLK 350.
To remove and to reinstall cover, see “Tow-
ing eye bolt CLK 350” (
page 429).
Towing eye bolt in rear bumper
1Cover on right side of rear bumper
2Recess in the coverTo remove cover 1:
Insert flat, blunt object as a lever in
recess 2 on the edge of cover 1.
Loosen cover 1 from the bumper us-
ing lever, to reveal the threaded hole
for towing eye bolt.
The towing eye bolt is supplied with the
tool kit (located in the compartment
underneath the trunk floor).
Screw towing eye bolt in to its stop and
tighten with lug wrench.To reinstall cover 1:Hook right-hand side of the cover1
into opening.
Slide cover1 as far as it will go in the
direction of the arrow3.
Gently press left-hand side of cover1
in direction of the arrow4.
The hooks on the left-hand side
engage.
iWhen closing the cover1, make sure the
cover’s check strap does not get caught.
Page 463 of 481

462 Index
Emergency tensioning device see ETD
Emergency, In case of
Battery, Jump starting 425
First aid kit 394
Flat tire, Changing 415
Fuses 431
Hazard warning flasher 135
Roadside Assistance 12, 282
Towing the vehicle 427
Emission control 302
Emission control information label 439
Emission control vacuum line
routing diagram label 439
Emission system warranties 10
Engine
Belt layout 440
Block heater (Canada only) 342
Break-in recommendations 292
Cleaning 348
Compartment 306
Malfunction indicator lamp 27, 359
Maximum engine speed 441
Message in display 380
Number 439
Starting 50
Starting difficulties 52Starting with KEYLESS-GO* 51
Starting with SmartKey 51
Technical data 441
Turning off 60
Turning off with KEYLESS-GO* 61
Turning off with SmartKey 61
Engine coolant see Coolant
Engine oil 308, 450
Adding 309, 450
Additives 450
Changing 309, 450
Checking level 305, 308
Consumption 308
Filler cap 309
Filler neck 309
Engine oil level 305
ESP
®91
Messages in display 370–371
Warning lamp 362
ETD 78
Safety guidelines 68
Exterior rear view mirrors 45, 180
Exterior view 22F
Filler cap, Engine oil 309
Filler neck, Engine oil 309
First aid kit 394
Flat tire 415
Jacking up the vehicle 416
Lowering the vehicle 419
Minispare wheel 397
Mounting the spare wheel 416
Preparing the vehicle 415
Flexible Service System
see FSS (Canada vehicles)
Floormats* 275
Fluids
Brake fluid 305, 450
Engine coolant 305
Engine oil 305, 450
Windshield washer and headlamp
cleaning* system 305, 449
Fog lamps 132, 407
Messages in display 387
Replacing bulbs 407, 408, 411
Front air bags 69
Front lamps see Headlamps
Page 476 of 481

475 Index
Tire inflation pressure
see the placard on the fuel filler flap
Tires 313, 442
Air pressure 337
Care and maintenance 314
Chains 342
Cleaning 315
Direction of rotation, Spinning 316
Driving instructions 296
Important notes,
Tire inflation pressure 322
Inflation pressure 305, 321, 323
Inflation pressure,
Information placard 321
Inspection 314
Load rating 339
MOExtended system* 420
MOExtended* 326, 442
Ply composition
and material used 339
Problems under-/overinflated 326
Retreads 313
Rims and tires 442
Rotation 340
Run Flat Indicator 324
Service life 314Sizes 443
Snow 341
Spare wheel 397, 416, 445
Speed rating 298, 330, 339
Storing 315
Temperature 322, 336
Terminology 337
Tire Identification Number see TIN
Traction 297, 339
Tread 339
Tread depth 315, 341
Treadwear indicators 339
Wear pattern 340
Winter 341
Tools 394
Top tether
Children in the vehicle 84
Tether attachment points 84
Towing eye bolt 394, 429, 430
Towing the vehicle 427
Tow-start 425, 427
Traction 92, 297, 339
Transmission see Automatic transmission
Traveling abroad 300
Tread 339
Tread depth 315, 341Treadwear indicators 339
Trip computer 163
Trip odometer 139
Trunk
Closing from inside 111
Fuse box 434
Lamp 137
Lid 109
Lock button, KEYLESS-GO* 106
Opening 109
Opening, from inside 110
Tie-down rings 267
Trunk lid 111
Trunk lid emergency release 116
Unlocking in an emergency 400
Unlocking/opening,
KEYLESS-GO* 107
Unlocking/opening,
SmartKey 101
Valet locking 117
Page 477 of 481
476 Index
Turn signal lamps
Cleaning lenses 350
Messages in display 387
Replacing bulbs (Bi-Xenon*) 411
Replacing bulbs (Halogen) 410
Replacing bulbs (rear) 411
Turn signals 55
Additional in mirrors 407
Bulbs 407
Bulbs (Bi-Xenon)) 411
Cleaning lenses 350
Indicator lamps 27
Turning off engine 60U
Uniform Tire Quality
Grading Standards 339
Units, Settings
Speedometer 154
Unleaded gasoline, Premium 451
Upholstery, Cleaning 354
Useful features 268V
Vacuum line routing diagram label 439
Vehicle
Battery 311, 421
Break-in period 292
Care 346
Control system, Settings menu 151
Dimensions 447
Jump starting 425
Locking/Unlocking,
KEYLESS-GO* 35, 62, 101
Locking/Unlocking,
SmartKey 34, 62, 98
Lowering 419
Modifications and alterations,
Operating safety 16
Towing 427
Unlocking/locking
in an emergency 399, 400
Washing 348
Weights 447
Vehicle jack 394, 395, 416
Vehicle lighting 305