Page 203 of 273
200 Tires, wheels
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Spare wheel
Important!
SLK 230 Kompressor:
The spare wheel rim size is 4
1/2 B x 15 H 2 with
inflatable, collapsible tire, size 165-15 89 P.
SLK 320:
The spare wheel rim size is 4
1/2 B x 16 H 2 with
inflatable, collapsible tire, size 165/70-16 92 P.
You should inf late the spare tire using the supplied air
pump.In the case of a f lat tire, you may temporarily use the
spare wheel, while observing the following restrictions:
•Do not exceed vehicle speed of 50 mph (80 km / h).
•Drive to the nearest tire repair facility to have the
flat tire repaired or replaced as appropriate.
•Do not operate vehicle with more than one
collapsible spare wheel / tire mounted.
For additional information, see page 249.
Page 204 of 273
201 Tires, wheels
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1Wheel bolt for wheel rim size 7 J x 16 H 2
and 8 J x 16 H 2
Wheel bolt for AMG wheel rim size 7
1/2 J x 17 H 2
and 8
1/2 J x 17 H 2
Wheel bolt for spare wheel rim size 4
1/2 B x 16 H 2
2Wheel bolt for spare wheel rim size 4
1/2 B x 15 H 2
(located with tire air pump)Note:
Wheel bolts (2) must be used when mounting spare
wheel rim size 4
1/2 B x 15 H 2.
21
P40.10-2154-26
Wa r n i n g !
Be su re to u se th e original lengt h wheel bolts wh en
remounting the original wheel after it has been
repaired.
Page 208 of 273
205 Tires, wheels
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For ease of handling and proper unfolding of tire during
its inflation when installing spare wheel with
collapsible tire, first mount the spare wheel, then inflate
the tire.
10.Clean contact surfaces of wheel and wheel hub.
Install wheel on wheel hub. Insert proper wheel
bolts and tighten them snugly.
Unscrew the alignment pin (4) to install the last
wheel bolt.
11.Inflate collapsible spare tire. (See next page for
detailed instructions).Important!
When installing spare wheel with collapsible tire, make
certain to use the correct wheel bolts, supplied in the
vehicle tool kit.
To avoid paint damage, place wheel f lat against hub and
hold it there while installing first wheel bolt.
12.Lower vehicle. Remove jack and insert jack tube
cover.
Page 209 of 273
206 Tires, wheels
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Notes:
Before storing t he j ack , it shoul d be ful ly c ol lapsed, wit h
pin and handle folded in.
The removed road wheel can be stored under the
luggage cover in a protective cover supplied with
vehicle. The collapsible spare wheel should be returned
to the wheel well.13.Using the wrench, tighten the five bolts evenly,
following the sequence illustrated, until all bolts are
tight. Observe a tightening torque of 80 ft.lb.
(110 Nm).
14.Ensure proper tire pressure.
Wa r n i n g !
Always replace wheel bolts that are damaged or
rusted.Never apply oil or grease to wheel bolts.Damaged wheel hub threads should be repaired
immediately.Incorrect mounting bolts or improperly tightened
mounting bolts can cause the wheel to come off.
This could cause an accident. Be sure to use the
correct mounting bolts.
Page 210 of 273

207 Tires, wheels
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cluster displayPractical hintsCar care Index Inflating the collapsible spare tire
The air pump is located inside the wheel well in the
trunk.
1Filler hose
2Electrical plug
3Pressure gauge with vent screw1.Remove air pump from storage compartment inside
trunk.
2.Open lid and pull out air hose with pressure gauge
and electrical plug.
Observe instructions on air pump label.
3.Unscrew tire valve cap from spare wheel tire valve.
4.Screw filler hose onto tire valve.
5.Plug air pump electrical plug into vehicle cigar
lighter.
6.To switch on air pump, turn key in steering lock to
position 1.
Important!
Do not start engine.
P40.10-2124-26
1
0
45 6max. 6 min
A 170 584 01 38 AIR COMPRESSOR 23
Mercedes-Benz
2
3
2 1
1
2,5 bar
36 psi1
0 23
4
5
620PSI
BAR40
60
80
LUFTPRESSER12
12
3
Wa r n i n g !
To prevent possible injury when unscrewing air
pump filler hose from tire valve after inflating the
tire, use a rag since the tire valve could be hot.
Page 211 of 273

208 Tires, wheels
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7.Operate air pump (approximately 5 minutes) until
pressure gauge displays 36 psi (2.5 bar).
8.To switch off air pump, turn key in steering lock to
position 0.
9.Unscrew filler hose from tire. Reinstall tire valve
cap.
Note:
Excessive tire air pressure should be released using the
vent screw.Storing spare wheel in wheel well
Deflate spare tire:
1.Unscrew valve stem removal tool, which is a part of
the valve cap, from tire valve.
2.Using the valve stem removal tool, open tire valve
slightly by turning the tire valve insert
counterclockwise to release air pressure.
3.When the tire air pressure has been released,
remove tire valve insert (protect it from dirt and
sand) using the previously removed tire valve cap.
4.Once all air is out of the tire, and the tire has
collapsed to its original shape, reinstall the tire
valve insert and valve cap.
Place spare wheel in wheel well and secure it with air
pump holder. Turn pump holder clockwise to its stop.
Page 213 of 273

210 Battery
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If a tire constantly loses air, it should be inspected for
damage.
The spare tire should be checked periodically for
condition. Spare tire will age and become worn over
time even if never used, and thus should be inspected
and replaced when necessary.Battery
Important!
Battery replacement information:
The maintenance-free battery is located in the engine
compartment.
The service life of the battery is dependent on its
condition of charge. The battery should always be kept
sufficiently charged, in order to last an optimum length
of time.
Wa r n i n g !
Do not overinflate tires. Overinflating tires can
result in sudden deflation (blowout) because they
are more likely to become punctured or damaged
by road debris, potholes etc.. Follow recommended
inflation pressures.Do not overload the tires by exceeding the specified
vehicle capacity weight (as indicated by the label
on the driver’s door latch post). Overloading the
tires can overheat them, possibly causing a
blowout.
Wa r n i n g !
Failure to follow these instructions can result in
severe injury or death.Never lean over batteries while connecting, you
might get injured.Battery fluid contains sulfuric acid. Do not allow
this fluid to come in contact with eyes, skin or
cloth ing. In c ase it does, im mediately f lush affected
area with water and seek medical help.A battery will also produce hydrogen gas, which is
flammable and explosive. Keep flames or sparks
away from battery, avoid improper connection of
jumper cables, smoking etc..
Page 244 of 273
241 Contents - Technical data
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Technical dataSpare parts service ........................242
Warranty coverage .........................242
Identification labels .......................243
Layout of poly-V-belt drive ............245
Technical data ................................248
Fuels, coolants, lubricants
etc. – capacities .........................252Engine oils ...................................... 254
Engine oil additives ...................... 254
Air conditioner refrigerant .......... 254
Brake fluid ...................................... 254
Premium unleaded gasoline ........ 255
Fuel requirements ........................ 255
Gasoline additives ......................... 256
Coolants .......................................... 256
Consumer information ................. 258