wheel bolt torque MERCEDES-BENZ SLK 230 KOMPRESSOR 2003 R170 Owner's Manual

182 OperationTires and wheelsTire pressure changes by approximately
1.5 psi (0.1 bar) per 18°F (10°C) of air
temperature change. Keep this in mind
when checking tire pressure where the
temperature is different from the outside
temperature.
The tire temperature and with it the tire
pressure is increased also while driving,
depending on the driving speed and the
tire load.Check the spare tire periodically for condi-
tion and inflation. Spare tires will age and
b e c o m e w o r n o v e r t i m e e v e n i f n e v e r u s e d ,
and thus should be inspected and replaced
when necessary.
Rotating wheels
The wheels can be rotated every 3000 to
6000 miles (5 000 to 10000 km), or soon-
er if necessary, according to the degree of
tire wear. The same direction of tire rota-
tion must be retained.Rotate the wheels before the characteris-
tic tire wear pattern becomes visible
(shoulder wear on front wheels and tread
center wear on rear wheels).
Thoroughly clean the inner side of the
wheels after each rotation. Check and en-
sure proper tire inflation pressure.
Warning!
G
Follow recommended inflation pressure.
Do not overinflate tires. Overinflated tires
can result in sudden deflation (blowout) be-
cause they are more likely to become punc-
tured or damaged by road debris, potholes
etc.
Do not underinflate tires. Underinflated tires
wear unevenly, adversely affect handling
and fuel economy, and are more likely to fail
from being overheated.
Do not overload the tires by exceeding the
specified vehicle capacity weight (as indicat-
ed by the label on the pillar in the driver’s
door opening). Overloading the tires can
overheat them, possibly causing a blowout.Warning!
G
Rotate front and rear wheels only if they are
of the same size.
Warning!
G
Have the tightening torque checked after
changing a wheel. Wheels could become
loose if not tightened with a torque of
80 ft.lb. (110 Nm).
Use only genuine Mercedes-Benz wheel
bolts specified for your vehicle's rims.

242 Practical hintsFlat tire

Unscrew the alignment bolt, install last
wheel bolt and tighten slightly.
Lowering the vehicle

Lower vehicle by turning crank coun-
terclockwise until vehicle is resting ful-
ly on its own weight.

Pull the jack out of the jack support
tube.

Remove jack tube cover.1-5Wheel bolts

Tighten the five wheel bolts evenly, fol-
lowing the diagonal sequence illustrat-
ed (1to5), until all bolts are tight.
Observe a tightening torque of 80 ft lb
(110 Nm).
Warning!
G
Always replace wheel bolts that are dam-
aged or rusted.
Never apply oil or grease to wheel bolts.
Damaged wheel hub threads should be re-
paired immediately. Do not continue to drive
under these circumstances! Contact an au-
thorized Mercedes-Benz Center or call
Roadside Assistance.
Incorrect mounting bolts or improperly
tightened mounting bolts can cause the
wheel to come off. This could cause an acci-
dent. Be sure to use the correct mounting
bolts.
Warning!
G
Use only genuine equipment
Mercedes-Benz wheel bolts. They are identi-
fied by the Mercedes star. Other wheel bolts
may come loose.
Do not tighten the wheel bolts when the ve-
hicle is raised. Otherwise the vehicle could
tip over.
Warning!
G
Have the tightening torque checked after
changing a wheel. The wheels could come
loose if they are not tightened to a torque of
80 ft lb (110 Nm).


282 Technical termsRetractable hardtop
Hardtop that can be opened and closed
at the push of a button and stored in
the trunk.
Roll bar
Occupant protection system which
consists of tubular steel sheathed in
plastic.
RON
(R
esearch O
ctane N
umber)
The Research Octane Number for gaso-
line as determined by a standardized
method. It is an indication of a gaso-
line's ability to resist undesired detona-
tion (knocking). The average of both
the ->MON (Motor Octane Number)
and RON (Research Octane Number) is
posted at the pump, also known as
ANTI-KNOCK INDEX.Shift lock
When the vehicle is parked, this lock
prevents the transmission selector le-
ver from being moved out of positionP
without key turned and brake pedal de-
pressed.
SRS
(S
upplemental R
estraint S
ystem)
Seat belts, emergency tensioning de-
vice and airbags. Though independent
systems, they are closely interfaced to
provide effective occupant protection.
Tele Aid System
(T
elematic A
larm I
dentification on
D
emand)
The Tele Aid system consists of three
types of response: automatic and man-
ual emergency, roadside assistance
and information. Tele Aid is initially ac-
tivated by completing a subscriber
agreement and placing an acquain-
tance call.The Tele Aid system is operational pro-
viding that the vehicle’s battery is
charged, properly connected, not dam-
aged and cellular and GPS coverage is
available.
Tightening torque
Force times lever arm (e.g. a lug
wrench) with which threaded fasteners
such as wheel bolts are tightened.
TIREFIT
Accessory for emergency and tempo-
rary tire repair. The TIREFIT kit consists
of a container with sealant material, a
filler hose, a valve stem tool, a valve in-
sert, and an air compressor.

299 Index
Premium unleaded gasoline 272
Rims and tires 261
Weights 268
Windshield and headlamp washer*
system 270, 275
Tele Aid 144
Emergency calls 146
Information 149
Initiating an emergency call
manually 147
Remote door unlock 151
Roadside assistance 148
Stolen vehicle tracking services 152
System self-check 145
Tele Aid System 145
Upgrade signals 150
Tele Aid System 282
Telephone* 143
Hands-free microphone 25
Operation 123
Telescoping steering column*
Adjusting 34
Temperature
Grades of tires 277
Setting interior temperature 104
Tires 182Tightening torque 282
Tightening torque (Wheel bolts) 242
Tire inflation pressure 236
Checking 170, 181
Tire speed rating 163, 283
Tire traction 163
TIREFIT 282
TIREFIT kit
Sealing tires with TIREFIT 229, 234
TIREFIT kit 1 229
TIREFIT kit 2 234
TIREFIT-Kit
Adding TIREFIT 231
Inflating the tire 232
Preparing TIREFIT 230, 235
Tires 180, 261
Collapsible 279
Consumer information 276
Direction of rotation 181
Driving instructions 162
Retreads 180
Rims and tires 261
Service life 181
Temperature 182
Temperature grades 277
Tread depth 183Wear pattern 182
Winter 183
Tools 206
Tow-away alarm 23, 72
Arming 72
Disarming 72
Disarming for transport 72
Towing eye bolt (vehicle tool kit)
Installing 252
Towing the vehicle 249, 251, 252
Tracking services
For stolen vehicle 152
Traction 97, 276, 283
Transmission see Automatic
transmission* 176
Transmission selector lever 214
Unlocking manually 214
Traveling abroad 165
Tread depth (tires) 183
Treadwear 276
Trip odometer
Resetting 89
Trunk
Closing 77
Lighting 87
Opening 77

301 Index
Vehicle jack 206
Wheel bolts 206
Wheel wrench 206
Vehicle washing 189
VIN (Vehicle Identification Number) 258,
283
Voice control system* 25, 283
Hands-free microphone 25
W
Warning sounds
Drivers seat belts 57
Parking brake 42
Warranty coverage 257
Washer fluid see Windshield washer fluid
Washing the vehicle 187
Wear pattern (tires) 182
Weights 268
Wheel change
Tightening torque 242
Wheels
Rotating 182
Tires and wheels 180
Wind screen 134, 283
Installing 134
Removing 135
Windows see Side windowsWindshield
Defogging 109
Refilling washer fluid 179
Replacing wiper blades 228
Washer fluid 179, 275
Washer system 275
Windshield washer fluid 275
Filler neck 179
Mixing ratio 275
Refilling 179
Wiping with 45
Windshield washer system 275
Windshield wipers 44
Fast wiper speed 44
Replacing wiper blades 228
Single wipe 45
Switching on 44
Wiping with windshield washer
fluid 45
Winter driving 183
Block heater 184
Snow chains 184
Tires 183
Transmission program mode 97
Winter driving instructions 164
Winter tires 183Wiper blades
Cleaning 190
Installing 228
Removing 228
Removing insert 228
Replacing 228
Wiping
And washing simultaneously 45
Interval 44
With windshield washer fluid 45
X
Xenon headlamps* 283