Get Wheels and tyres -> Emergency spare wheel Guide for Mercedes B Class SUV Third Generation (2018-2026)

Lower the vehicle (/ page 602).

Lowering the vehicle aer a wheel change

Requirements

The new wheel has been tted (/ page 601).

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 diagonal

pattern 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 specied tightening torque of 130 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 qualied specialist work-

shop and have the tightening torque

checked immediately.

Check the tyre pressure of the newly tted

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 loss warning sys-

tem: restart the tyre pressure loss warning

system (/ page 593).

Vehicles with a tyre pressure monitoring sys-

tem: restart the tyre pressure monitoring sys-

tem (/ page 592).

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 dier. The emer-

gency spare wheel or spare wheel can signi-

cantly impair driving characteristics of the

vehicle.

To prevent hazardous situations:

Drive carefully.

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Wheels and tyres

F247 0072 02

Never t more than one emergency

spare wheel or spare wheel that diers

in size.

Only use an emergency spare wheel or

spare wheel briey.

Do not deactivate ESP

Have the emergency spare wheel or

spare wheel of a dierent size replaced

at the nearest qualied specialist work-

shop. The new wheel must have the cor-

rect dimensions.

The deated emergency spare wheel is

secured in the emergency spare wheel bag in

the load compartment and is secured to the

adjustable load compartment oor in the

lower position.

Observe the following notes on removing an emer-

gency spare wheel:

Before stowing the emergency spare wheel,

make sure there is no air le in the tyre.

If necessary, allow the air to escape.

To release air from the tyre: remove the valve

cap of the tyre.

Press down the metal insert in the valve using

a pointed object, e.g. a pen.

Screw the valve cap onto the valve.

Vehicles with adjustable load compartment

oor: always stow the deated emergency

spare wheel in the lower position on the

adjustable load compartment oor.

Observe the following notes on tting an emer-

gency spare wheel:

The maximum permissible speed with an

emergency spare wheel tted is 80 km/h.

Do not t the emergency spare wheel with

snow chains.

Replace the emergency spare wheel aer six

years at the latest, regardless of wear.

Use the wheel bolts that are included with the

emergency spare wheel.

Check the tyre pressure of the emergency

spare wheel tted. Correct the pressure as

necessary.

The specied tyre pressure is stated on the

label of the emergency spare wheel.

Vehicles with a tyre pressure loss warning

system: if an emergency spare wheel is tted,

the tyre pressure loss warning system cannot

function reliably. Only restart the system

again when the emergency spare wheel has

been replaced with a new wheel.

Vehicles with a tyre pressure monitoring sys-

tem: if an emergency spare wheel is tted, the

tyre pressure monitoring system cannot func-

tion reliably. For a few minutes aer an emer-

gency spare wheel is tted, the system may

still display the tyre pressure of the removed

wheel. Only restart the system again when the

emergency spare wheel has been replaced

with a new wheel.

Be sure to also observe the following further rela-

ted subjects:

Notes on tyre pressure (/ page 589)

Tyre pressure table (/ page 590)

Notes on tting tyres (/ page 593)

Fitting an emergency spare wheel

(/ page 597)

Wheels and tyres

603

F247 0072 02

Inating the emergency spare wheel

NOTE Overheating due to the tyre ination

compressor running too long

Do not run the tyre ination compressor

for longer than ten minutes without inter-

ruption.

Requirements:

The emergency spare wheel has been tted

correctly. (/ page 597)

Comply with the manufacturer's safety notes

on the sticker of the emergency spare wheel

and on the tyre ination compressor.

Remove the sticker with the label 80 km/h

from the tyre ination compressor housing

and ax it to the instrument cluster within the

driver's eld of vision.

Remove the tyre ination compressor from the

stowage space under the luggage compart-

ment oor. (/ page 54)

Pull ller hose 1 and plug 3 out of the tyre

ination compressor housing.

Insert plug 7 of ller hose 1 in the socket

on the tyre ination compressor and then turn

it until plug

7 engages.

Unscrew the cap from the valve on the emer-

gency spare wheel.

Screw union nut 2 of ller hose 1 onto the

valve.

Make sure on and o switch 4 of the tyre

ination compressor is set to

Insert plug 3 in a socket in your vehicle.

Cigarette lighter socket

12 V socket: (/ page 205)

Observe the notes on the cigarette lighter in

the Digital Owner's Manual

Observe the notes on sockets: (/ page 205)

Press the start/stop button once to switch on

the power supply (/ page 245).

Press On/O switch 4 on the tyre ination

compressor to

The tyre ination compressor is switched on.

The tyre is inated. The tyre pressure appears

on manometer 5.

Pump the tyre to the specied tyre pressure.

The specied tyre pressure is stated on the

label of the emergency spare wheel.

When the specied tyre pressure has been

reached, press on and o switch 4 on the

tyre ination compressor to

The tyre ination compressor is switched o.

Press the start/stop button to switch o the

power supply.

If the tyre pressure is higher than the specied

pressure, press pressure release valve button

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Wheels and tyres

F247 0072 02

6 until the correct tyre pressure has been

reached.

Unscrew union nut 2 of ller hose 1 from

the valve.

Screw the valve cap of the emergency spare

wheel onto the valve again.

Stow ller hose 1 and plug 3 in the lower

section of the tyre ination compressor hous-

ing.

Stow the tyre ination compressor in the vehi-

cle.

Wheels and tyres

605

F247 0072 02

Wheels and tyres -> Emergency spare wheel for Your Mercedes B Class SUV Third Generation (2018-2026)

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