2005 MERCEDES-BENZ SLK CLASS flat tire

394 Practical hintsFlat tire
PressI on electric air pump switch2.
The electric air pump switches on and
inflates the collapsible tire.

Inflate the collapsible tire to approxi-
mately 51 psi (3.5 bar).
This takes about five minutes for the
collapsible tire. Air hose4 and union
nut5 can become hot during infla-
tion. Exercise proper caution to avoid
burning yourself when using the equip-
ment.

Press0 on electric air pump switch2.

Turn the SmartKey in the starter switch
to position0.
The electric air pump should now be
switched off.

If the tire inflation pressure is above
51 psi (3.5 bar), release excess tire in-
flation pressure using the vent screw
on air hose4.

Detach the electric air pump.

Reinstall collapsible tire valve cap.

Store electrical plug3 and air
hose4 behind flap 1 and place the
electric air pump back in the trunk.
!Do not operate the electric air pump
longer than six minutes without inter-
ruption. Otherwise it may overheat.
You may operate the electric air pump
again after it has cooled off.
Warning!
G
Follow recommended tire inflation
pressures.
Do not underinflate tires. Underinflated tires
wear excessively and / or unevenly,
adversely affect handling and fuel economy,
and are more likely to fail from being over-
heated.
Do not overinflate tires. Overinflated tires
can adversely affect handling and ride
comfort, wear unevenly, increase stopping
distance, and result in sudden deflation
(blowout) because they are more likely to
become punctured or damaged by road
debris, potholes etc.


395 Practical hints
Flat tire
Lowering the vehicle
Lower vehicle by turning the crank
counterclockwise until vehicle is rest-
ing fully on its own weight.

Remove the jack.
1-5 Wheel bolts

Tighten the five wheel bolts evenly in
the direction of the arrow, following the
diagonal sequence illustrated
(1to5), until all bolts are tight.
Observe a tightening torque of
80 lb-ft (110 Nm).

Fully collapse the jack.

Place the vehicle tool kit, electric air
pump, and the jack back in the storage
compartment under the trunk floor.

Wrap the damaged wheel in the protec-
tive sheet provided with the spare
wheel and put the wheel in the trunk.
Warning!
G
Inflate the collapsible tire using the electric
pump (
page 393) before
lowering the ve-
hicle.
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 lb-ft (110 Nm).iThe flat tire may be transported in the
trunk when the retractable hardtop is
closed.

413 Technical data
Rims and tires
Rims and tires
!
Only use tires which have been specifi-
cally developed for your vehicle and
tested and approved by
Mercedes-Benz. Tires approved by
Mercedes-Benz are developed to pro-
vide best possible performance in con-
junction with the driving safety
systems on your vehicle such as ABS or
ESP. Tires specially developed for your
vehicle and tested and approved by
Mercedes-Benz can be identified by
finding the following on the tire’s side-
wall:

MO = M
ercedes-Benz O
riginal
equipment tires


MOE = M
ercedes-Benz O
riginal
E
xtended (tires with limited run-flat
characteristics) original equipment
tires
Using tires other than those approved
by Mercedes-Benz may result in dam-
age that is not covered by the
Mercedes-Benz Limited Warranty.
iFor information on driving with
MOExtended tires*, see
“MOExtendedsystem” (
page 312).
!Using tires other than those approved
by Mercedes-Benz can have detrimen-
tal 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 inflation pressure infor-
mation for driving at high speeds
(page 307) or for vehicle loads less
than the maximum loaded vehicle con-
dition. 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 maintenance recom-
mendation included with vehicle.

414 Technical dataRims and tiresSame size tires
17" tires
SLK 350
SLK 350 (Sport Package*)
SLK 55 AMG
Rims (light alloy)
71/2J x 17 H2
71/2J x 17 H2
Wheel offset
1.42 in (36 mm)
1.46 in (37 mm)
Summer tires (radial-ply tires)
-
-
Winter tires (radial-ply tires)
225/45 R17 91H M+S
or
225/45 R17 91H M+S MOExtended
1
1Must be used in conjunction with Run-Flat Indicator* only.
205/50 R17 89H M+S
2
or
225/45 R17 91H M+S
2
or
225/45 R17 91H M+S MOExtended
1,2
2For use with snow chains contact an authorized Mercedes-Benz Center.

416 Technical dataRims and tiresMixed size tires
SLK 350
SLK 350 (Sport Package*)
Front axle:Rims (light alloy)
71/2J x 17 H2
71/2J x 17 H2
Wheel offset
1.42 in (36 mm)
1.46 in (37 mm)
Summer tires (radial-ply tires)
225/45 R17 91W
or
225/45 R17 91W MOExtended
1
225/45 R17 91W
or
225/45 R17 91W MOExtended
1
Rear axle:Rims (light alloy)
81/2J x17 H2
81/2J x17 H2
Wheel offset
1.18 in (30 mm)
1.18 in (30 mm)
Summer tires (radial-ply tires)
245/40 R17 91W
2
or
245/40 R17 91W MOExtended
1,2
245/40 R17 91W
2
or
245/40 R17 91W MOExtended
1,2
1Must be used in conjunction with Run Flat Indicator* only.2Must not be used with snow chains.

418 Technical dataRims and tiresSpare wheel with collapsible tire
All models
Rim (light alloy)
4.5 B x 17 H2
Wheel offset
0.47 in (12 mm)
Collapsible tire
145/70-17 92P
1
1Must not be used with snow chains.iPlease note that the tire inflation
pessure of the collapsible tire differs
from the tire inflation pressure of the
road tires.
Inflate the collapsible tire to approxi-
mately 51 psi (3.5 bar).

432 Technical termsCAN system
(C
ontroller A
rea N
etwork)
Data bus network serving to control ve-
hicle functions such as door locking or
windshield wiping.
Cockpit
All instruments, switches, buttons and
indicator/warning lamps in the passen-
ger compartment needed for vehicle
operation and monitoring.
Cold tire inflation pressure
(
page 323)
Collapsible tire
An especially compact spare tire that
must be inflated with a provided air
pump before using. It should only be
used to bring the vehicle to the nearest
service station.COMAND
(Co
ckpit Man
agement and
D
ata System)
Information and operating center for
vehicle sound and communications
systems, including the radio,
CD changer and navigation system, as
well as other optional equipment (e.g.
telephone).
Control system
The control system is used to call up
vehicle information and to change
component settings. Information and
messages appear in the multifunction
display. The driver uses the buttons on
the multifunction steering wheel to
navigate through the system and to ad-
just settings.
Cruise control
Driving convenience system for auto-
matically maintaining the vehicle speed
set by the driver.Curb weight
(
page 323)
DOT
(Department o
f Transportation)
(
page 323)
Engine number
The number set by the manufacturer
and placed on the cylinder block to
uniquely identify each engine pro-
duced.
Engine oil viscosity
Measurement for the inner friction (vis-
cosity) of the oil at different tempera-
tures. The higher the temperature an
oil can tolerate without becoming thin,
or the lower the temperature it can tol-
erate without becoming viscous, the
better the viscosity.
ESP
(Electronic S
tability Pr
ogram)
Improves vehicle handling and direc-
tional stability.

434 Technical termsLine of fall
The direct line an object moves down-
hill when influenced by the force of
gravity alone.
Locking knob
Button on the door which indicates
whether the door is locked or un-
locked. Pushing the locking knob down
on an individual door from inside locks
that door.
Maintenance System (U.S. vehicles)
Maintenance service indicator in the
multifunction display that informs the
driver when the next vehicle mainte-
nance service is due. The Maintenance
System in your vehicle tracks distance
driven and the time elapsed since your
last maintenance service, and calls for
the next maintenance service accord-
ingly.Maximum loaded vehicle weight
(
page 324)
Maximum load rating
(page 324)
Maximum tire inflation pressure
(page 324)
Memory function
Used to store three individual seat,
steering wheel and mirror positions for
each SmartKey.
MON
(Motor O
ctane N
umber)
The Motor Octane Number for gasoline
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.Multifunction display
Two display fields in the instrument
cluster used to present information
provided by the control system.
Multifunction steering wheel
Steering wheel with buttons for operat-
ing the control system.
Normal occupant weight
(
page 324)
Overspeed range
Engine speeds within the red marking
of the tachometer dial. Avoid this
engine speed range, as it may result in
serious engine damage that is not
covered by the Mercedes-Benz Limited
Warranty.
Poly-V-belt drive
Drives engine components (alternator,
AC compressor, etc.) from the engine.