Page 203 of 273
200 Tires, wheels
Te ch n ica l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hintsCar care Index
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
Te ch n ica l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hintsCar care Index Spare wheel bolts
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 205 of 273

202 Tires, wheels
Te ch n ica l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hintsCar care Index
Changing wheelsMove vehicle to a level area which is a safe distance 
from the roadway.
1.Set parking brake and turn on hazard warning 
flasher.
2.Move selector lever to position “P” and turn off 
engine (manual transmission to 1st or reverse gear).
3.Prevent vehicle from rolling away by blocking 
wheels with wheel chocks (not supplied with 
vehicle) or sizable wood block or stone. When 
changing a wheel on a hill, place chocks on the 
downhill side blocking both wheels of the other 
axle. On a level road, place one chock in front of and 
one behind the wheel that is diagonally opposite to 
the wheel being changed.
The jack is designed exclusively for jacking up the 
veh icle at the jack tu bes bui lt into eith er si de of th e 
vehicle. To help avoid personal injury, use the jack 
only to lift the vehicle during a wheel change. 
Never get beneath the vehicle while it is supported 
by th e 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 whi le th e vehic le is 
raised. Be certain that the jack is always vertical 
when in use, especially 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 jackstands before 
working under the vehicle. 
     
        
        Page 206 of 273
203 Tires, wheels
Te ch n ica l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hintsCar care Index 4.Using the wrench, loosen but do not yet remove the 
wheel bolts.5.Remove the protective cover from the jack support 
tube opening by inserting the screwdriver (supplied 
in the tool kit) in the opening and prying it out.
The tube openings are located directly behind the 
front wheel housings and in front of the rear wheel 
housings. 
     
        
        Page 207 of 273
204 Tires, wheels
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data Instruments 
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6.Holding the jack, unfold pin (1) and handle (2). 
Insert pin fully into the tube hole up to the stop. 
Crank handle clockwise until jack base (3) meets 
the ground. Place jack on firm ground. Position the 
jack so that it is always vertical (plump-line) as seen 
from the side (see arrow), even if the vehicle is 
parked on an incline.
7.Jack up the vehicle until the wheel is clear of the 
ground. Never start engine while vehicle is raised.8.Unscrew upper-most wheel bolt and screw in 
alignment pin (4) supplied in the tool kit. Remove 
the remaining bolts. Keep bolt threads protected 
from dirt and sand.
9. Remove wheel. Grip wheel from the sides. Keep 
hands from beneath the wheels. 
     
        
        Page 208 of 273
205 Tires, wheels
Te ch n ica l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hintsCar care Index Important!
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
Te ch n ica l
data Instruments 
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cluster displayPractical hintsCar care Index
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
Te ch n ica l
data Instruments 
and controlsOperation DrivingInstrument 
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.