wheel alignment MERCEDES-BENZ M-Class 2014 W166 Owner's Manual

Useful information
i This Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please note that your vehicle may
not be equipped with all features
described. This also applies to safety-
related systems and functions.
i Read the information on qualified
specialist workshops: (Y page 28).Where will I find...?
First-aid kit
X
Open the tailgate.
X Remove first-aid kit 0002from the parcel net.
i Check the expiration date on the first-aid
kit at least once a year. Replace the
contents if necessary, and replace missing
items. Vehicle tool kit
General notes The vehicle tool kit can be found in the
stowage well under the cargo compartment
floor.
i
Apart from certain country-specific
variations, the vehicles are not equipped
with a tire-change tool kit .Some tools for changing a wheel are specific to the
vehicle. For more information on which
tools are required to perform a wheel
change on your vehicle, consult a qualified
specialist workshop.
Tools required for changing
awheel may
include, for example:
R Jack
R Wheel chock
R Lug wrench
R Ratchet wrench
R Alignment bolt
Vehicles with aTIREFIT kit Vehicle tool kit (example)
0002
Lug wrench
0003 Jack
0023 Alignmen tbolt
0022 Tire inflation compressor
0020 Tire sealant filler bottle
0021 Folding wheel chock
0014 Towing eye
0015 Ratchet wrench
Use the TIREFIT kit (Y page 383).380
Where will I find...?Breakdown assistance

Vehicles with
a"Minispare" emergency
spare wheel Example
:vehicles with AIRMATIC and trailer tow
hitch
0002 Folding wheel chock
0003 Lug wrench
0023 Alignment bolt
0022 Towing eye
0020 Jack
0021 Ratchet wrench
X Lift the cargo compartment floor up
(Y page 342).
X Remove "Minispare" emergency spare
wheel (Y page 436). Flat tire
Preparing the vehicle
Your vehicle may be equipped with:
R MOExtended tires (tires with run-flat
properties) (Y page 382)
Vehicle preparation is not necessary on
vehicles with MOExtended tires.
R a TIREFIT kit (Y page 380)
R an emergency spare wheel (only for certain
countries) (Y page 436)
Information on changing/mounting a wheel
(Y page 421).
X Stop the vehicle on solid, non-slippery and
level ground, as far away as possible from
traffic.
X Switch on the hazard warning lamps. X
Secure the vehicle against rolling away
(Y page 179).
X If possible, bring the fron twheels into the
straight-ahead position.
X Vehicles with the AIRMATIC package:
make sure that highway level is selected
(Y page 207).
X Switch off the engine.
X Vehicles without KEYLESS-GO: remove
the SmartKey from the ignition lock.
X Vehicles with KEYLESS-GO: open the
driver's door.
The on-board electronics now have status
0.T his is the same as the SmartKey having
been removed.
X Vehicles with KEYLESS-GO: remove the
Start/Stop button from the ignition lock
(Y page 158).
X All occupants must get out of the vehicle.
Make sure that they are not endangered as
they do so.
X Make sure that no one is near the danger
area while a wheel is being changed.
Anyone who is not directly assisting in the
wheel change should, for example, stand
behind the barrier.
X Get out of the vehicle. Pay attention to
traffic conditions when doing so.
X Close the driver's door.
X Unload heavy luggage.
i Only operate the tire inflation compressor
using a 12 V socket, even if the ignition is
turned off (Y page 347).
An emergency cut-out ensures that the on-
board voltage does not drop too low. If the
on-board voltage is too low, the power to
the sockets is automatically cut. This
ensures that there is sufficient power to
start the engine. Flat tire
381Breakdown assistance

R
before raising the vehicle, secure it from
rolling away by applying the parking brake
and inserting wheel chocks. Never
disengage the parking brake while the
vehicle is raised.
R the jack must be placed on a firm, flat and
non-slip surface. On a loose surface, a
large, load-bearing underlay must be used.
On a slippery surface, a non-slip underlay
must be used, e.g. rubber mats.
R do not use wooden blocks or similar
objects as a jack underlay. Otherwise, the
jack will not be able to achieve its load-
bearing capacity due to the restricted
height.
R make sure that the distance between the
underside of the tires and the ground does
not exceed 1.2 in (3 cm).
R never place your hands and feet under the
raised vehicle.
R never lie under the raised vehicle.
R never start the engine when the vehicle is
raised.
R never open or close a door or the tailgate
when the vehicle is raised.
R make sure that no person sare present in
the vehicle when the vehicl eis raised. X
Using lug wrench 0002, loosen the bolts on
the wheel you wish to change by abouto ne
full turn. Do not unscrew the bolts
completely. The jacking points are located jus
tbehind the
front wheel housings and just in front of the
rear wheel housings (arrows).
X Take the ratchet wrench out of the vehicle
tool kit and place it on the hexagon nut of
the jack so that the letters AUFare visible. 0003
Jacking points
0023 Jack
0022 Crank
X Position jack 0023at jacking point 0003.
The alignment bolt on the jack must be
inserted into the intended jacking point
hole. 424
Changing
awheelWheels and tires

Example
X
Make sure the foot of the jack is directly
beneath the jacking point.
X Turn ratchet wrench 0022until jack 0023sits
completely on jacking point 0003and the
base of the jack lies evenly on the ground.
X Turn ratchet wrench 0022until the tire is
raised amaximum of 1.2 in (3 cm )from the
ground.
Removing awheel !
Do not place wheel bolts in sand or on a
dirty surface. The bol tand wheel hub
threads could otherwise be damaged when
you screw them in. X
Unscrew the uppermost wheel bolt
completely.
X Screw alignment bolt 0002into the thread
instead of the wheel bolt.
X Unscrew the remaining whee lbolts fully.
X Remove the wheel. Mounting
anew wheel G
WARNING
Oiled or greased wheel bolts or damaged
wheel bolts/hub threads can cause the wheel
bolts to come loose .As a result, you could
lose a wheel while driving. There is a risk of
accident.
Never oil or grease wheel bolts. In the event
of damage to the threads, contact a qualified
specialist workshop immediately.H ave the
damaged wheel bolts or hub threads
replaced/renewed. Do no tcontinue driving. G
WARNING
If you tighten the wheel bolts or wheel nuts
when the vehicle is raised, the jack could tip
over. There is a risk of injury.
Only tighten the wheel bolts or wheel nuts
when the vehicle is on the ground.
! To prevent damage to the paintwork, hold
the wheel securely against the wheel hub
while screwing in the first wheel bolt.
Always pay attention to the instructions and
safety notes in the "Changing a wheel"
section (Y page 421).
Only use wheel bolts that have been designed
for the wheel and the vehicle. For safety
reasons, Mercedes-Benz recommends that
you only use wheel bolts which have been
approved for Mercedes-Benz vehicles and the
respective wheel.
! Always use wheel bolts 0003to mount the
"Minispare" emergency spare wheel. Using
other wheel bolts to mount the "Minispare"
emergency spare wheel could damage the
brake system. Changing
awheel
425Wheels and tires Z

0002
Wheel bolts for all wheels supplied by the
factory
0003 Wheel bolts for the collapsible spare
wheel X
Clean the wheel and wheel hub contact
surfaces.
X Slide the wheel to be mounted onto the
alignment bolt and push it on.
X Tighten the wheel bolts until they are
finger-tight.
X Unscrew the alignment bolt.
X Tighten the last wheel bolt until it is finger-
tight.
Lowering the vehicle G
WARNING
The wheels could work loose if the wheel nuts
and bolts are not tightened to the specified
tightening torque. There is a risk of accident.
Have the tightening torque immediately
checked at a qualified specialist workshop
after a wheel is changed. X
Place the ratchet wrenc honto the hexagon
nut of the jack so that the letters ABare
visible.
X Turn the ratche twrench until the vehicle is
once again standing firmly on the ground.
X Place the jack to one side.
X Tighten the wheel bolts evenly in a
crosswise pattern in the sequence
indicated ( 0002to0020). The tightening torque
must be 110 lb-ft (150 Nm).
X Turn the jack back to its initial position.
X Stow the jack and the rest of the tire-
change tool kit in the stowage well under
the cargo compartment floor again.
X Check the tire pressure of the newly
installed wheel and adjust it if necessary.
Observe the recommended tire pressure
(Y page 402).
i Vehicles with tire pressure monitor: all
wheels mounted must be equipped with
functioning sensors. Wheel and tire combinations
General notes
! For safety reasons, Mercedes-Benz
recommends that you only use tires and
wheels which have been approved by
Mercedes-Benz specifically for your
vehicle. 426
Wheel and tire combinationsWheels and tires