MERCEDES-BENZ C-CLASS ESTATE 2021 Owners Manual

=The foot of the jack must be positioned verti-
cally under the jack support point.Rules of conduct when the vehicle is raised:
= Never place your hands or feet under the vehi-
cle.
= Never lie under the vehicle.
=
Do not start the vehicle and do not release the electric parking brake.
= Do not open or close any doors or the tailgate.
Using the wheel wrench, loosen the wheel
bolts on the wheel you wish to change by
about one full turn. Do not unscrew the bolts
completely.Position of jack support points&WARNING Risk of injury from incorrect
positioning of the jack
If you do not position the jack correctly at the
appropriate jacking point of the vehicle, the jack could tip with the vehicle raised.
Only position the jack at the appropriate
jacking point of the vehicle. The base of
the jack must be positioned vertically under the jacking point of the vehicle.Wheels and tyres359

*NOTE Vehicle damage from the jack
If you do not position the jack correctly at the
appropriate jack support point of the vehicle,
the jack could tip over with the vehicle raised.
The jack is designed exclusively for jack-
ing up the vehicle at the jack support
points.Take the ratchet out of the tyre-change tool kit
and place it on the hexagon nut of the jack so that the letters "AUF" are visible.Position support 2 of jack 4 on jack sup-
port point 1.Turn ratchet 3 clockwise until support 2
sits completely on jack support point 1 and
the base of the jack lies evenly on the ground.Turn ratchet 3 until the tyre is raised a maxi-
mum of 3 cm from the ground.Loosen and remove the wheel (  page 360).Removing a wheel
Requirements:
= The vehicle is raised (  page 358).
When changing a wheel, avoid applying any force
to the brake discs, as this could impair the level of
comfort when braking.
*NOTE Damage to threading from dirt on
wheel boltsDo not place wheel bolts in sand or on a
dirty surface.Unscrew the uppermost wheel bolt com-
pletely.360Wheels and tyres

Screw centring pin 1 into the thread instead
of the wheel bolt.Unscrew the remaining wheel bolts com-
pletely.Remove the wheel.Fit the new wheel (  page 361).Fitting a new wheel&WARNING Risk of accident from losing a
wheel
Oiled or greased wheel bolts can cause the
wheel bolts to come loose, as too can dam-
aged wheel bolts or wheel hub threads.
Never oil or grease the threads.In the event of damage to the threads,
contact a qualiNed specialist workshop
immediately.Have the damaged wheel bolts or dam-
aged hub threads replaced.Do not continue driving.Observe the information on the choice of tyres
(  page 353).
For tyres with a speciNed direction of rotation, an
arrow on the side wall of the tyre indicates the
correct direction of rotation. Observe the direc- tion of rotation when Ntting.
Slide the wheel to be mounted onto the cen-
tring pin and push it on.&WARNING Risk of injury from tightening
wheel bolts and nuts
If you tighten the wheel bolts or wheel nuts
when the vehicle is raised, the jack could tip.
Only tighten wheel bolts or wheel nuts
when the vehicle is on the ground.Be sure to observe the instructions and safety
notes on "Changing a wheel" (  page 353).For safety reasons, only use wheel bolts which
have been approved by Mercedes-Benz and
for the wheel in question.Tighten the wheel bolts evenly in a diagonal pattern in the order indicated until they are Nnger-tight.Unscrew and remove the centring pin.Tighten the last wheel bolt until it is Nnger-
tight.Lower the vehicle (  page 362).Wheels and tyres361

Lowering the vehicle aser a wheel change
Requirements:
= The new wheel has been Ntted ( page 361).
To lower the vehicle: place the ratchet onto
the hexagon nut of the jack so that the letters "AB" are visible and turn anti-clockwise.Tighten the wheel bolts evenly in a diagonalpattern in the order indicated 1 to 5 with
an initial maximum force of 80 Nm.Tighten the wheel bolts evenly in a diagonal pattern in the order indicated 1 to 5 with
the speciNed tightening torque of 150 Nm.&WARNING Risk of accident due to incor-
rect tightening torque
The wheels could come loose if the wheel
bolts or wheel nuts are not tightened to the
prescribed torque.
Ensure that the wheel bolts or wheel
nuts are tightened to the prescribed
tightening torque.If you are not sure, do not move the vehi-
cle. Contact a qualiNed specialist work-
shop and have the tightening torque checked immediately.Check the tyre pressure of the newly Ntted
wheel and adjust it if necessary.%The following does not apply if the new wheel is an emergency spare wheel.Vehicles with a tyre pressure monitoring sys-tem: restart the tyre pressure monitoring sys-
tem (  page 353).Emergency spare wheel
Notes on the emergency spare wheel
&WARNING Risk of accident caused by
incorrect wheel and tyre dimensions
The wheel or tyre size and the tyre type of the
emergency spare wheel or spare wheel and
the wheel to be replaced may diMer. The emer-
gency spare wheel or spare wheel can signiN-
cantly impair driving characteristics of the
vehicle.
To prevent hazardous situations:
Drive carefully.Never Nt more than one emergency
spare wheel or spare wheel that diMers
in size.Only use an emergency spare wheel or spare wheel brieOy.Do not deactivate ESP n
.Have the emergency spare wheel or
spare wheel of a diMerent size replaced
at the nearest qualiNed specialist work-362Wheels and tyres

shop. The new wheel must have the cor-
rect dimensions.%The emergency spare wheel is secured in the emergency spare wheel bag in the load com-
partment.
Observe the following notes on Ntting an emer-
gency spare wheel:
= Check the tyre pressure of the emergency
spare wheel Ntted. Correct the pressure as
necessary.
= The maximum permissible speed with an
emergency spare wheel Ntted is 80 km/h.
= Do not Nt the emergency spare wheel with
snow chains.
= Replace the emergency spare wheel aser six
years at the latest, regardless of wear.
%Vehicles with a tyre pressure monitoring sys-
tem: if an emergency spare wheel is Ntted, the
tyre pressure monitoring system cannot func-
tion reliably. For a few minutes aser an emer-
gency spare wheel is Ntted, the system may
still display the tyre pressure of the removedwheel. Only restart the system again when the emergency spare wheel has been replacedwith a new wheel.
Be sure to also observe the following further rela-
ted subjects:
= Notes on tyre pressure (  page 350)
= Tyre pressure table (  page 351)
= Notes on Ntting tyres (  page 353)
Wheels and tyres363

Notes on technical data
The technical data was determined in accordance
with EU Directives. The data stated only applies to
vehicles with standard equipment. You can obtain
further information from a Mercedes-Benz Service Centre.
Only for certain countries: you can Nnd vehicle-
speciNc vehicle data in the COC documents (CER-
TIFICATE OF CONFORMITY). These papers are
included with the vehicle.
On-board electronics
Notes on tampering with the engine electronics
*NOTE Premature wear through improper
maintenance
Improper maintenance may cause vehicle
components to wear more quickly and the
vehicle's operating permit may be invalidated.
Always have work on the engine elec-
tronics and related components carried
out at a qualiNed specialist workshop.Two-way radios

qNotes on Ntting two-way radios
&WARNING Risk of accident due to
improper work on two-way radios
If two-way radios are manipulated or retroNt-
ted incorrectly, the electromagnetic radiation
from the two-way radios can interfere with the vehicle electronics and jeopardise the operat-
ing safety of the vehicle.
You should have all work on electrical
and electronic components carried out
at a qualiNed specialist workshop.&WARNING Risk of accident from incorrect
operation of two-way radios
If you use two-way radios in the vehicle
improperly, their electromagnetic radiation
can disrupt the vehicle's electronics. This is true in the following situations, in particular:
= The two-way radio is not connected to an
exterior aerial.
= The exterior aerial is Ntted incorrectly or is
not a low-reOection aerial.
This could jeopardise the operating safety of
the vehicle.Have the low-reOection exterior aerial Nt-
ted at a qualiNed specialist workshop.When operating two-way radios in the
vehicle, always connect them to the low-
reOection exterior aerial.*NOTE Invalidation of the operating permit
due to failure to comply with the instruc-
tions for installation and use
The operating permit may be invalidated if the instructions for installation and use of two-wayradios are not observed.
Only use approved frequency bands.Observe the maximum permissible out-put power in these frequency bands.Only use approved aerial positions.364Technical data

1Rear roof area
On vehicles with a panoramic sliding sunroof, Nt-
ting an aerial to the roof area is not permitted.
Use Technical SpeciNcation ISO/TS 21609 (Road
Vehicles !

Regulatory radio identiNcation of small compo-
nents
Not all regulatory radio identiNcation can be
applied to small components due to their geomet-
ric dimensions. Therefore, the following tables list
the manufacturers of these components and the
countries/regions with the identiNcation required
by radio regulations.
Overview of manufacturersManufactur-
er's abbre-
viated des-
ignationManufacturer informationADCADC Automotive Distance Con- trol Systems GmbH, Peter-Dor-
nier-Stra

Manufactur-
er's abbre-
viated des-
ignationManufacturer informationMeta Sys-
temMeta System S.P.A., Via T.
Galimbreti 5, 42124 Reggio Emi-
lia, ItalyPanasonicPanasonic Automotive Systems
Europe GmbH, Robert-Bosch-
Stra

Manufac-
turerModel designationRadio
equipment
approval
number (if
available)HELLADM4 (locking sys-
tem)H-17845Hirschmann920287A (locking
system)H-15694Hirschmann920287B (locking
system)H-15695Huf BaolongTSSRE4A (tyre
pressure monitor-
ing sensor)H-20027HUFHUF14632 (locking
system)H-15541HUFHUF4761 (locking
system)H-11545Manufac-
turerModel designationRadio
equipment
approval
number (if
available)LEOPOLD
KOSTALKK1 (locking sys-
tem)H-16874MAR-
QUARDTDC12A (locking
system)H-17689MAR-
QUARDTDC12B (locking
system)H-21034MAR-
QUARDTDC12K (locking
system)H-21035MAR-
QUARDTMS2 (locking sys-
tem)H-17598MAR-
QUARDTMS4 (locking sys-
tem)H-23101Manufac-
turerModel designationRadio
equipment
approval
number (if
available)MAR-
QUARDTMS5 (locking sys-
tem)H-24933MAR-
QUARDTMK1 (locking sys-
tem)H-17213MAR-
QUARDTMK2 (locking sys-
tem)H-17212MAR-
QUARDT3350.38 (locking
system)H-23166MAR-
QUARDTMU1 (locking sys-
tem)H-23102MAR-
QUARDTMU2 (locking sys-
tem)H-24936368Technical data