tire pressure MERCEDES-BENZ SL500 2005 R230 Service Manual

393 Practical hints
Flat tire
Mounting the spare wheel Preparing the vehicle
Prepare the vehicle as described
(
page 388).

Turn spare wheel bracket counter-
clockwise to loosen.

Take the spare wheel out of the trunk.
Lifting the vehicle

Prevent the vehicle from rolling away
by blocking wheels with wheel chocks
(not included) or other sizable objects.
When changing wheel on a level sur-
face:
Place one chock in front of and one
behind the wheel that is diagonally
opposite to the wheel being
changed.
When changing wheel on a hill:

Place chocks on the downhill side
blocking both wheels of the other
axle.

Take the vehicle tool kit and the jack
out of the storage compartment under
the trunk floor (
page 372).
Warning!
G
The dimensions of the spare wheel are dif-
ferent from those of the road wheels. As a
result, the vehicle handling characteristics
change when driving with a mounted spare
wheel. Adapt your driving style accordingly.
The spare wheel is for temporary use only.
When driving with spare wheel mounted, en-
sure proper tire inflation pressure and do
not exceed vehicle speed of 50 mph
(80 km/h).
Drive to the nearest Mercedes-Benz Center
as soon as possible to have the spare wheel
replaced with a regular road wheel.
Never operate the vehicle with more than
one spare wheel mounted.
Warning!
G
The jack is designed exclusively for jacking
up the vehicle at the jack tubes built into
both sides of the vehicle. To help avoid per-
sonal injury, use the jack only to lift the ve-
hicle during a wheel change. Never get
beneath the vehicle while it is supported by
the jack. Keep hands and feet away from the
area under the lifted vehicle. Always firmly
set parking brake and block wheels before
raising vehicle with jack.
Do not disengage parking brake while the
vehicle is raised. Be certain that the jack is
always vertical (plumb line) when in use, es-
pecially on hills. Always try to use the jack
on level surface. Be sure that the jack arm is
fully inserted in the jack tube. Always lower
the vehicle onto sufficient capacity jack-
stands before working under the vehicle.


397 Practical hints
Flat tire

Unscrew the alignment bolt, install last
wheel bolt and tighten slightly.Inflating the spare tire

Take the electric air pump out of the
trunk (
page 372).
1Flap
2Air hose with pressure gauge and vent
screw
3Union nut
4Electrical plug

Open flap 1 on air pump.

Pull out electrical plug 4 and air hose
with the pressure gauge 2.

Remove the valve cap from the tire
valve.

Screw air hose 2 onto the tire valve.

Insert electrical plug 4 into vehicle ci-
gar lighter socket.
Warning!
G
Only use 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.
!Do not lower the vehicle before inflat-
ing the spare wheel tire. Otherwise the
rim may be damaged.Warning!
G
Observe instructions on air pump label.


398 Practical hintsFlat tire
Turn the SmartKey in the starter switch
to position1.
or

Press the KEYLESS-GO* start/stop
button on the gear selector lever once
without depressing the brake pedal.

Press I on the electric air pump switch.
The electric air pump should now
switch on and inflate the tire.

Inflate the tire to approx. 36 psi
(2.5 bar).
This takes about five minutes for the
spare tire. Air hose 2 and union
nut3 can become hot duration infla-
tion. Exercise proper caution to avoid
burning yourself when using the equip-
ment.

Press 0 on the electric air pump switch.

Turn the SmartKey in the starter switch
to position0.
or

Press KEYLESS-GO* start/stop button
on the gear selector lever twice without
depressing the brake pedal.
The electric air pump should now be
switched off.

If the tire inflation pressure is above
36 psi (2.5 bar), release excess tire in-
flation pressure using the vent screw.!Do not operate the air pump longer
than eight minutes without interrup-
tion. Otherwise it may overheat.
You may operate the air pump again af-
ter it has cooled off.
Warning!
G
Follow recommend inflation pressures.
Do not overinflate tires. Overinflating 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.


399 Practical hints
Flat tire

Detach the electric air pump.

Stow the electrical plug and the air
hose behind the flap and place the air
pump back in the trunk.Lowering the vehicle

Lower vehicle by turning crank coun-
terclockwise until the full weight of the
vehicle is resting on the ground.

Pull the jack out of the jack support
tube.
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 96 lb-ft
(130 Nm).

Before storing the jack in the trunk,
crank back to storage position and fold
in the arm.
iThe flat tire may be transported in the
trunk when the retractable hardtop is
raised. Use the protective sheet provid-
ed with the spare wheel. Do not acti-
vate the tire inflation pressure monitor
until the deflated tire has been re-
moved from the vehicle.
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
96 lb-ft (130 Nm).Warning
G
When turning the wheel wrench to tighten
the wheel bolts, make sure you position
hands on the wrench in such a way that you
avoid injury to yourself, such as scraping
your hands against the wheel. Make sure
turning the wheel wrench will not scratch or
damage the wheel rim.

400 Practical hintsFlat tireReplacing jack support tube cover
Slide tongue of cover under the upper
edge of the tube opening.

Applying even pressure, press cover
until it snaps into place.
Be careful not to damage the locking
tabs or clamp the plastic retaining
strap.

422 Technical dataRims and tiresOnly use tires and rims which have been
specifically developed for your vehicle and
tested and approved by Mercedes-Benz.
Other tires and rims can have detrimental
effects, such as

Poor handling characteristics


Increased noise


Increased fuel consumption
!Moreover, tires and rims not approved
by Mercedes-Benz may, under load,
exhibit dimensional variations and dif-
ferent tire deformation characteristics
that could cause them to come into
contact with the vehicle body or axle
parts. Damage to the tires or the vehi-
cle may be the result.
iFurther information on tires and rims is
available at any authorized
Mercedes-Benz Center. A placard with
the recommended tire inflation pres-
sures is located on the driver’s door
B-pillar. Some vehicles may have sup-
plemental tire pressure information for
driving at high speeds (
page 289) or
for vehicle loads less than the maxi-
mum loaded vehicle condition. If such
information is provided, it can be found
on the placard located on the inside of
the fuel filler flap. The tire inflation
pressure should be checked regularly
and should only be adjusted on cold
tires. Follow tire manufacturer’s main-
tenance recommendation included
with vehicle.

446 IndexAir conditioner refrigerant 433
Air conditioning (cooling)
Turning off 191
Turning on 191
Air pressure 305
Air pressure see Tire inflation pressure
Air pump, electric 373
Turning on 398
Air recirculation mode 187
Air volume adjustment 185
AIRBAG OFF
Warning lamp 334
Airbags 63
Children 64
Front 68
Head-thorax 68, 69
Kneebag 68
Passenger 68Alarm
Audible 78, 88
Canceling 90
Visual 88
Alignment bolt 439
Alignment bolt (vehicle tool kit) 396
Anticorrosion/antifreeze 432, 437
Anti-theft alarm system 88
Arming 89
Canceling the alarm 90
Disarming 89
Anti-theft systems
Anti-theft alarm system 88
Tow-away alarm 90
Aquaplaning see Hydroplaning
Armrest
Storage compartment 229
Ashtray 29, 233
Aspect ratio 305
At the gas station 267
ATF (automatic transmission fluid) 275Automatic climate control 29, 182
Center air vents 29
Deactivating 191
Residual heat utilization 190
Side air vents 29
Temperature sensor 31
Automatic shift program 170
Automatic transmission 164
Accelerator position 171
Comfort program mode 170
Emergency operation (Limp Home
Mode) 177
Gear ranges 167
Gear selector lever 30, 164
Gear selector lever position 164, 168
Gear shifting malfunctions 177
Kickdown 171
Manual shifting 166
One-touch gearshifting 166
Program mode selector switch 30,
170
Transmission fluid 275

448 IndexCenter air vents 29
Center console
Lower part 30
Upper part 29
Centigrade
Setting temperature units 148
Central locking
Automatic 110
Central locking switch 111
Switching on/off (control
system) 156
Unlocking from inside 111
Central locking switch 29
Central unlocking switch 29
Changing
Batteries (SmartKey with
KEYLESS-GO*) 378
Batteries (SmartKey) 377
SmartKey setting 96
SmartKey with KEYLESS-GO*
settings 103
Vehicle level 222Charging
Vehicle batteries 404
CHECK ENGINE
Messages in display 351
CHECK ENGINE malfunction indicator
lamp 27, 327, 328
Checking
Coolant level 276
Oil level 269, 272
Tire inflate pressure 269
Vehicle lighting 269
Child safety
Airbags 64
Automatic child seat recognition 76
Infant and child restraint systems 62
Cigarette lighter 29, 233
Cleaning
Cup holder 320
Gear selector lever 320
Hard plastic trim items 320
Headlamps 178Headliner 320
Leather upholstery 321
Plastic and rubber parts 321
Seat belts 320
Steering wheel 320
Upholstery 321
Windshield 53
Wood trims 321
Cleaning tires 281
Clock 23
Closing
Hood 271
Power window with
KEYLESS-GO* 195
Retractable hardtop (SmartKey) 201
Retractable hardtop (switch) 198
Side windows 194, 195
Sunshade 204
Trunk lid 109
Windows 193
Windows with KEYLESS-GO* 195

449 Index
Cockpit 440
Cold tire inflation pressure 305
Collapsible tire 440
COMAND 29, 440
COMAND, radio and telephone 264
Combination switch 23, 52, 128
Comfort driving
Transmission program mode 170
Control system 134, 137, 440
AUDIO menu 139
Convenience submenu 157
Distronic* menu 142
Functions 136
Instrument cluster submenu 148,
149
Lighting submenu 152
Menus 136
Multifunction display 134
Multifunction steering wheel 135
NAVI menu 142
Standard display menu 134, 139Submenus 138
TEL* menu 161
Time submenu 149
Trip computer menu 159
Vehicle status message memory
menu 143
Vehicle submenu 156
Convenience feature 201
Coolant 435
Adding 276
Anticorrosion/antifreeze
quantity 437
Checking level 276
Messages in display 351, 352, 353
Temperature 266
Temperature gauge 131
Temperature warning lamp 25
Warning lamp 328
Coolant temperature gauge 25
Cooling see Air conditioner
Courtesy lighting 130Cruise control 205, 440
“Resume” function 208
Canceling 206
Driving downhill 206
Driving uphill 206
Fine adjustment 208
Setting a higher speed 207
Setting current speed 206
Setting to last stored speed 208
Cruise control lever 23, 205
For cruise control 205
For Distronic* 213
Cup holder 29, 228
Cleaning 320
Curb weight 305
Customer Assistance Center 439
D
Daytime running lamp mode 125
Setting 152
Deactivating
Air conditioning (cooling) 191

461 Index
Service System see Vehicle Maintenance
System
Setting 150
Convenience functions 157
Daytime running lamp mode 152
Digital clock 23
Distronic* time interval 216
Exterior rear view mirror parking
position 158
Instrument lighting 131
Interior lighting delayed
switch-off 155
Key-dependent memory 158
Lamps and lighting (control
system) 152
Locator lighting 153
Lower speed in cruise control 207
Miles/kilometers in
speedometer 148
Multifunction display language 149
Night security illumination 154
Radio station 140
Slower speed in cruise control 207Speedometer display mode 148
Suspension tuning 220
Temperature (interior) 185
Temperature indicator 148
Time (control system) 149
Time display mode 151
Tire inflation pressure units 156
Units
Temperature 148
Tire inflation pressure 156
Units in speedometer 148
Vehicle level control 221
Setting current speed
Cruise control 206
Setting last stored speed
Distronic* 215
Setting speed
Cruise control 207
Distronic* 214
Setting the time (hours) 150
Setting the time (minutes) 151Setting to last stored speed
Cruise control 208
Settings
Calling up Distronic* 142, 212
Convenience functions 157
Factory (SmartKey) 96
Resetting all (control system) 145
Selective (SmartKey) 96
Settings menu
Individual vehicle settings 144
Submenus 145
Shifting
Gear selector lever 164
Gear selector lever positions 168
Into optimal gear range (Automatic
transmission) 166
Shoulder support
Seat adjustment 116
Side air vents 29
Side marker lamps 381, 384