Page 278 of 417
277 Operation
Tires and wheels
Rotate tires before the characteristic tire
wear pattern becomes visible (shoulder
wear on front tires and tread center wear
on rear tires).
Thoroughly clean the mounting face of
wheels and brake disks, i.e. the inner side
of the wheels/tires, during each rotation.
Check for and ensure proper tire inflation
pressure.
For information on wheel change, see “Flat
tire” (
page 348).
Warning!G
Have the tightening torque checked after
changing a wheel. Wheels could become
loose if not tightened with a torque of
97 lb-ft (130 Nm).
Only use genuine Mercedes-Benz wheel
bolts specified for your vehicle’s rims.
Page 353 of 417

352 Practical hints
Flat tire
Lowering the vehicle
Using the pump handle, open the low-
ering screw on the jack approximately
one turn (
page 350).
The vehicle is resting fully on its own
weight.
Remove the jack.
After use, disassemble pump handle
(
page 350) and store jack in the des-
ignated storage compartment
(
page 324).
1-5 Wheel bolts
Tighten the five wheel bolts evenly, fol-
lowing the diagonal sequence illustrat-
ed (1 to 5), until all bolts are tight.
Observe a tightening torque of 97 lb-ft
(130 Nm).Press the jack piston in again and close
the lowering screw. Store the jack
(
page 324) and the other vehicle
tools (
page 323).
After changing the wheel, secure the
damaged wheel on the spare wheel
mounting bracket (
page 326). Make
sure the wheel cannot come loose.
Check the tire inflation pressure and
correct it if necessary.
A table with the tire pressure values for
your vehicle is located on the fuel filler
flap.
Warning!G
Have the tightening torque checked after
changing a wheel as soon as possible. The
wheels could come loose if they are not
tightened to a torque of 97 lb-ft (130 Nm).
Page 388 of 417

387 Technical terms
Rim
(
page 275)
RON
(R
esearch Octane Number)
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 gear selec-
tor lever from being moved out of
positionP without key turned and
brake pedal depressed.
Sidewall
(
page 275)SRS
(S
upplemental Restraint System)
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 Alarm Identification 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-
vided that the vehicle’s battery is
charged, properly connected, not dam-
aged and cellular and GPS coverage is
available.Telematics*
A combination of the terms “telecom-
munications” and “informatics”.
Tightening torque
Force times lever arm (e.g. a lug
wrench) with which threaded fasteners
such as wheel bolts are tightened.
TIN
(Tire Identification Number)
(
page 275)
Tire load rating
(
page 265)
Tire ply composition and material used
(
page 275)
Tire speed rating
(
page 275)
Traction
(
page 275)
Page 410 of 417

409 Index
Tele Aid 202
Call priority 208
Emergency calls 204
Information 207
Initiating an emergency call
manually 205
Messages in display 321
Remote door unlock 209
Roadside Assistance 206
Stolen Vehicle Recovery
services 210
System self-check 203
Tele Aid System 202
Tele Aid System 387
Telematics* 387
Telephone
Answering a call 147
Dialing a number from the phone
book 148
Ending a call 147
Loading phone book 148
Operating 146
Redialing 148
Telephone* 26, 201
Messages in display 322Temperature
Display mode 136
Setting interior temperature 170
Setting units in display 136
Tires 261
Text messages
Multifunction display 300
Tie-down rings (cargo compartment) 193
Tightening torque 387
Tightening torque (wheel bolts) 352
Tilt/sliding sunroof 178
Closing 178, 330
Closing with SmartKey 179
Opening 178, 330
Opening with SmartKey 179
Stopping 179
Time
Setting display mode 136
Time display mode
Setting 136
TIN 275
Tire
Vehicle maximum load on 276
Tire and Loading Information 256
Tire and loading terminology 273
Tire care and maintenance 253Tire Identification Number see TIN
Tire inflation pressure
Checking 260, 261
Tire inspection 253
Tire load rating 275
Tire ply composition and material
used 275
Tire speed rating 225, 266, 275
Tire terminology 273
Tire traction 224
Tires 252, 371
Direction of rotation 255
Driving instructions 223
Retreads 252
Rims and tires 371
Rotating 276
Service life 253
Temperature 261, 272
Tread depth 254, 278
Wear pattern 277
Winter 278
Tools 323
Tow-away alarm 28, 89
Arming 89
Disarming 89
Disarming for transport 89