2014 MERCEDES-BENZ GL-Class ECU

If your vehicle is equipped with a wheel chock,
it can be found in the tire-change tool kit
(Y page 386).
The folding wheel chock is an additional
securing measure to prevent the vehicle from
rolling away, for example when changing a
wheel.
X Fold both plates upwards :.
X Fold out lower plate ;.
X Guide the lugs on the lower plate fully into
the openings in base plate =.Securing the vehicle on level ground
X
On level ground: place chocks or other
suitable items under the front and rear of
the wheel that is diagonally opposite the
wheel you wish to change. Securing the vehicle on slight downhill gradients
X On light downhill gradients: place
chocks or other suitable items in front of
the wheels of the front and rear axle. Raising the vehicle G
WARNING
If you do not position the jack correctly at the
appropriate jacking point of the vehicle, the
jack could tip over with the vehicle raised.
There is a risk of injury.
Only position the jack at the appropriate
jacking point of the vehicle. The base of the
jack must be positioned vertically, directly
under the jacking point of the vehicle.
! AMG vehicles with "Minispare"
emergency spare wheel: use the
"Minispare" emergency spare wheel only
on the rear axle. If you mount the
"Minispare" emergency spare wheel on the
front axle, this could result in damage to the
brake system.
If a tire on the front axle is defective, an
intact wheel from the rear axle must first
be replaced with the "Minispare"
emergency spare wheel. The defective
wheel on the front axle can then be
replaced with the intact wheel from the rear
axle.
Make sure to note the placard on the
"Minispare" emergency spare wheel.
! The jack is designed exclusively for
jacking up the vehicle at the jacking points.
Otherwise, your vehicle could be damaged.
Observe the following when raising the
vehicle:
R to raise the vehicle, only use the vehicle-
specific jack that has been tested and
approved by Mercedes-Benz. If used
incorrectly, the jack could tip over with the
vehicle raised.
R the jack is designed only to raise and hold
the vehicle for a short time while a wheel
is being changed. It is not suited for
performing maintenance work under the
vehicle.
R avoid changing the wheel on uphill and
downhill slopes. Changing a wheel
429Wheels and tires Z

R
before raising the vehicle, secure it from
rolling away by applying the parking brake
and inserting wheel chocks. Do not
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, flat, 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 do not lie under the vehicle.
R do not 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 persons are present in
the vehicle when the vehicle is raised. X
Using lug wrench :, loosen the bolts on
the wheel you wish to change by about one
full turn. Do not unscrew the bolts
completely. The jacking points are located just behind 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. ;
Jacking points
= Jack
? Crank
X Position jack =at jacking point ;.
The alignment bolt on the jack must be
inserted into the intended opening on the
jacking point. 430
Changing a wheelWheels and tires

Example
X
Make sure the foot of the jack is directly
beneath the jacking point.
X Turn ratchet wrench ?until jack =sits
completely on jacking point ;and the
base of the jack lies evenly on the ground.
X Turn ratchet wrench ?until the tire is
raised a maximum of 1.2 in (3 cm) from the
ground.
Removing a wheel !
Do not place wheel bolts in sand or on a
dirty surface. The bolt and wheel hub
threads could otherwise be damaged when
you screw them in. X
Unscrew the uppermost wheel bolt
completely.
X Screw alignment bolt :into the thread
instead of the wheel bolt.
X Unscrew the remaining wheel bolts fully.
X Remove the wheel. Mounting a new 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. Have the
damaged wheel bolts or hub threads
replaced/renewed. Do not continue 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 ( Ypage 427).
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 ;to mount the
"Minispare" emergency spare wheel. Using
other wheel bolts to mount the "Minispare"
emergency spare wheel could damage the
brake system. Changing a wheel
431Wheels and tires Z

Removing the emergency spare wheel
Emergency spare wheel (example: vehicle without
lockable cargo compartment floor)
The "Minispare" emergency spare wheel can
be found in the stowage well under the cargo
compartment floor.
X Lift the cargo compartment floor up
(Y page 347).
X Vehicles with a lockable cargo
compartment floor: remove the stowage
tray.
X Release the Velcro fastener (Y page 386).
X Take out the jack.
X Turn emergency spare wheel retainer :
counter-clockwise and remove it.
X Remove stowage well ;.
X Remove "Minispare" emergency spare
wheel =. On vehicles with a Bang & Olufsen sound
system, the "Minispare" emergency spare
wheel is packed in the emergency spare
wheel bag. The emergency spare wheel bag is secured to the cargo tie down rings in the
cargo compartment.
To stow the "Minispare" emergency spare
wheel, the rear seats in the third row must be
folded in (Y page 111).
X To remove the emergency spare
wheel: open the tailgate.
X Detach fastening straps ;.
X Unhook retaining spring hooks :and =
of fastening straps ;from the lasing
eyelets.
X Remove the emergency spare wheel bag
with the "Minispare" emergency spare
wheel.
X Open the emergency spare wheel bag and
remove the "Minispare" emergency spare
wheel.
X To stow the emergency spare wheel:
place the "Minispare" emergency spare
wheel into the emergency spare wheel bag
and close the emergency spare wheel bag.
X Place the emergency spare wheel bag with
the "Minispare" emergency spare wheel
into the cargo compartment with the
carrying strap at the back.
X Hook retaining spring hooks :and =of
fastening straps ;into the lasing eyelets.
X Tighten fastening straps ;.
Always observe the instructions and safety
notes in the "Mounting a wheel" section
(Y page 428). 440
Emergency spare wheelWheels and tires