lffl!I.___W __ h_a_ t_ d_ o_ I_ d_ o_ n_ o_w_ ? _____________________________________________ _
- Disengage and lower the floor panel before you close the
luggage compartment lid again.
Storing the replaced wheel
-Place the replaced wheel inside the spare wheel well in the
luggage compartment.
Tighten the knurled retaining screw clockwise to secure
the wheel in place.
- Disengage and lower the floor panel before you close the
luggage compartment lid again.
& WARNING
Loose items in the passenger compartment can cause serious
personal injury during hard braking or in an accident.
• Never store the spare wheel or jack and tools in the passenger
compartment.
• Always store all jacking equipment, tools, and the spare wheel
in the luggage compartment.
• Tighten the knurled retaining screw for the spare wheel
securely.
[ i] Tips
Check the inflation pressure of the spare tire periodically to keep the
tire ready for use.•
Changing a wheel
Before changing a wheel
Observe the following precautions for your own and your
passenger's safety when changing a wheel.
- After you experience a tire failure, pull the car well away
from moving traffic and try to reach
level ground before
you stop :::> & .
- All passengers should
leave the car and move to a safe
location (for instance, behind the guardrail) :::>& .
- Engage the
parking brake to prevent your vehicle from
rolling unintentionally:::> &.
- Move
selector lever to position P :::> & .
- If you are towing a trailer: unhitch the trailer from your
vehicle.
- Take the
jack and the spare tire out of the luggage
compartment:::>
page 318.
& WARNING
You or your passengers could be injured while changing a wheel if
you do not follow these safety precautions:
• If you have a flat tire, move a safe distance off the road. Turn
off the engine, turn the emergency flashers on and use other
warning devices to alert other motorists.
• Make sure that passengers wait in a safe place away from the
vehicle and well away from the road and traffic.
• To help prevent the vehicle from moving suddenly and possibly
slipping off the jack, always fully set the parking brake and block
the wheel diagonally opposite the wheel being changed. When
one front wheel is lifted off the ground, placing the Automatic
~
What do I do now? Ill
----------------
& WARNING (con tinued)
Trans missio n in "P " (Pa rk) w ill not pre ve nt the vehicle from
mo ving .
• Befo re you ch an ge a wheel , be s ure the ground i s le ve l an d
firm . If ne cess ary, us e a sturdy b oard und er the jack.
• Aft er in st a llin g the sp are wheel , make sure that you repl ace
the flat tire /wheel in it s storage area prop erly and tight en the
knurled ret ain ing s crew se cu rel y.•
Changing a wheel
When you change a wheel, follow the sequence described
below step-by-step and in exactly that order .
1. Activate the vehicle jack mode (only vehicles with Adaptive
Air Suspension) =>
page 170.
2. Remove the decorative wheel cover *. For more details see
also =>
page 322, "Decorative wheel covers" .
3 . Loosen the
wheel bolts => page 322.
4. Locate the proper mo unti ng point for the jack and align
the jack below that point=>
page 323.
5. Lift the car with the jack=> page 323.
6. Remove the wheel with the flat tire and then install the
spare =>
page 324.
7. Tighten all wheel bolts lightly.
8 .
Lower the vehicle with the jack.
9. Use the wheel bolt wrench and
firmly t ighten all wheel
bolts =>
page 322.
10. Replace the decorative wheel cover *.
Safety first
1 1. Deactivate the vehicle jack mode (only vehicles with
Adaptive Air Suspens ion) =>
page 170 .
& WARNING
Alwa ys re ad and f ollow all WARNINGS and information ~ & in
" Ra ising the vehicl e" on pag e
32 3 and ~ pag e 325. •
After changing a wheel
A wheel change is not complete without the doing the
following .
-Store and secure the wheel you replaced in the spare
wheel well .
- Replace the tools and the jack in the ir proper location.
- Check the tir e pr essur e on the spare wheel immediately
after mounting it .
- As soon as possib le, have the
tighten ing torques on a ll
wheel bolts checked with a torque wrench . The correct
tightening torque is 90 ft lb (120 Nm) .
- Have the flat tire
replaced as soon as possible.
[ i ] Tips
• If you not ic e that the wheel bolts are corroded and difficu lt to turn
wh ile chang ing a tire, they should be replaced before you check the
tightening torque .
• Drive at reduced speed until you have the tighten ing torques
checked. •
Vehicle care Do-it-yourself service Technical data
What do I do now? -________________ Vf'.'11
- Screw the threaded end of the alignment pin from the
tool kit hand-tight into the empty bo lt hole~
page 324,
fig. 232.
- Then re m ove the o ther wheel bolts as described above.
- Take off t he w heel leaving the alignment pin i n the bolt
hole.
Putting on the spare wheel
- Lift the spare wheel and carefully slide it over the alig n
ment pi n to guide it in p lace .
- Use the hexagona l socket in the screwdriver handle to
screw in and tighte n all w heel bolts
slightly.
- Remove the alig nment pi n and inse rt an d tighten the
remaining wheel bolt slig htly like the rest.
- Turn the jac k han dle counter-c lockwise to lower the
ve hicle u ntil the jack is fully released.
- Use the wheel bolt wrench to t ighten all whee l bolts firmly
~ page 322. Ti ghten them crosswise, from one bolt to
the (approximately) opposite one, to keep the w heel
centered.
[I] Tips
Never use the hexagonal socket i n the handle of the screwdriver to
loosen or tighten the wheel bolts.
• Pull the reve rsible blade from the screwdriver before yo u use the
hexagonal socket in the handle to t urn the whee l bolts.
• When mounting tires with
unidirectional tread design make sure
t he tread pa ttern is po inted the right way~
page 325.
Safety first
• The wheel bolts should be clea n and easy to turn. Check for dirt
and cor rosion on the mat ing surfa ces o f bo th the whee l and the hub.
Remove all d irt from these surfaces before remounting the wheel. •
Tires with unidirectional tread design
Tires with unidirectional tread design must be mounted
with their trea d pattern pointed in the right direction .
Using a spare tire with a tread pattern intended for
use in a specific direction
When using a spare tire w ith a tread pattern intended for use in a
specific direction, p lease note the fo llow ing:
• T he direct ion of rotation is marked by an ar row on the s ide of the
tire.
• If the spare tire has to be installed in the incor rect d irect ion, use
the spare tire only tempo rari ly since the tire wi ll not be ab le to
achieve its optimum pe rforma nce charact erist ics with rega rd to
aquaplaning, noise and wear.
• We recommend that you pay particular attention to this fact
during wet weather and that you adjust your speed to match road
condit ions.
• Replace the flat t ire with a new one and have it installed on your
vehicle as soon as possible to restore the handling advantages of a
unidirect iona l tire .•
Notes on wheel changing
Please read the information~ page 307, "New tires and replacing
t ires and wheels" if yo u are go ing to use a spa re t ire wh ich is d iffe rent
from the tires on yo ur vehicle .
After you c hange a ti re:
• Check the tire pressure on the spa re immediately after installa-
tion. ..,
Vehicle care Do-it-yourself service Technical data