tire type MERCEDES-BENZ SL55AMG 2003 R230 Owner's Manual

234 OperationTires and wheels
Tires and wheelsSee your authorized Mercedes-Benz Cen-
ter for information on tested and recom-
mended rims and tires for summer and
winter operation. They can also offer ad-
vice concerning tire service and purchase.
Retread tires are not tested or recom-
mended by Mercedes-Benz, since previous
damage cannot always be recognized on
retreads. Mercedes-Benz can therefore
not assure the operating safety of the vehi-
cle when such tires are used.
See your authorized Mercedes-Benz Cen-
ter for information on tested and recom-
mended rims and tires for summer and
winter operation.
Important guidelines

Only use sets of tires and rims of the
same type and make.


Tires must be of the correct size for the
rim.


Break in new tires for approximately
60 miles (100 km) at moderate
speeds.


Regularly check the tires and rims for
damage.


If vehicle is heavily loaded, check tire
pressure and correct as required.


Do not allow your tires to wear down
too far. Adhesion properties on wet
roads are sharply reduced at tread
depths under
1/8in (3 mm).


When replacing individual tires, you
should mount new tires on the front
wheels first (on vehicles with
same-sized wheels all around).
Warning!
G
Replace rims or tires with the same designa-
tion, manufacturer and type as shown on the
original part. See your authorized
Mercedes-Benz Center for further informa-
tion. If incorrectly sized rims and tires are
mounted:

The wheel brakes or suspension compo-
nents can be damaged.


The correct operating clearance of the
wheels and the tires is no longer guaran-
teed.
Warning!
G
Worn, old tires can cause accidents. If the
tire tread is badly worn, or if the tires have
sustained damage, replace them.
When replacing rims, only use genuine
Mercedes-Benz wheel bolts specified for the
particular rim type. Failure to do so can re-
sult in the bolts loosening and may lead to
an accident.

355 Technical terms
RON
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 AN-
TI-KNOCK INDEX.
SBC
(S
ensotronic B
rake C
ontrol)
Electronically controlled hydraulic
braking system for increased braking
safety and comfort.
Shift lock
When the vehicle is parked, this lock
prevents the transmission selector le-
ver from being inadvertently moved out
of position P without key turned and
brake pedal depressed. 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
(Tele
matic A
larm I
dentification on D
e--
mand)
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.
Tire speed rating
Part of tire designation; indicates the
speed range for which a tire is ap-
proved.
Traction
Force exerted by the vehicle on the
road via the tires.

369 Index
Retractable hardtop 354
Closing (electronic key) 164
Closing (switch) 161
Locking after raising/lowering 162
Message in display 287
Opening (key) 163
Opening (switch) 160
Problems when operating 164
Roll bar 61, 354
Installing wind screen 165
Lowering 62
Message in display 286
Raising 62
Warning lamp 21
Roll bar buttons 24
RON 225, 355
Roof see Retractable hardtop
S
SBC brake system 68, 72, 355
Activation 73
Deactivation 74
Driving hints 74
Messages in display 265, 266, 268
Self-check 74
Warning lamp 72
Screwdriver (vehicle tool kit) 288Seat belt force limiter 60
Seat belts 37, 52, 58
Message in display 272
Warning lamp 256
Seat cushion depth 33
Seat heater
Switching off 97
Switching on 97
Seat ventilation*
Switching off 96
Switching on 96
Seats
Adjusting backrest tilt 33
Adjusting cushion depth 33
Adjusting height 33
Adjusting lumbar support 94
Adjusting shoulder support 94
Heater 97
Massage function 94
Moving 95
Selector lever 24
Lock 39, 355
Position (automatic
transmission) 137Service
Batteries 319
Calling up the service indicator 242
Major service (Service B) 241
Minor service (Service A) 241
Overdue 241
Types 241
When due 241
Service indicator 241
Clearing 241
Service life (tires) 235
Service System see FSS 241
Setting
Convenience functions 129
Cruise control 170
Daytime running lamp mode 124
Distronic* time interval 179
Exterior rear view mirror parking
position 131
Individual vehicle 119
Instrument lighting 108
Interior lighting delayed
switch-off 127
Key dependent memory 130
Lamps and lighting (control
system) 124