Get Wheels and tires -> Changing a wheel Guide for Mercedes B Class SUV Second Generation (2011-2017)

PSI (pounds per square inch)

A standard unit of measure for tire pressure.

Aspect ratio

Relationship between tire height and tire width

in percent.

Tire pressure

This is pressure inside the tire applying an out-

ward force to each square inch of the tire's sur-

face. The tire pressure is specified in pounds per

square inch (psi), in kilopascal (kPa) or in bar.

The tire pressure should only be corrected when

the tires are cold.

Cold tire pressure

The tires are cold:

if the vehicle has been parked with the tires

out of direct sunlight for at least three hours

and

if the vehicle has not been driven further than

1 mile (1.6 km)

Tread

The part of the tire that comes into contact with

the road.

Bead

The tire bead ensures that the tire sits securely

on the wheel. There are several steel wires in the

bead to prevent the tire from coming loose from

the wheel rim.

Sidewall

The part of the tire between the tread and the

bead.

Weight of optional extras

The combined weight of those optional extras

that weigh more than the replaced standard

parts and more than 2.3 kg (5 lbs). These

optional extras, such as high-performance

brakes, level control, a roof rack or a high-per-

formance battery, are not included in the curb

weight and the weight of the accessories.

TIN (Tire Identification Number)

This is a unique identifier which can be used by

a tire manufacturer to identify tires, for example

for a product recall, and thus identify the pur-

chasers. The TIN is made up of the manufactur-

er's identity code, tire size, tire type code and

the manufacturing date.

Load bearing index

The load bearing index (also load index) is a code

that contains the maximum load bearing capa-

city of a tire.

Traction

Traction is the result of friction between the tires

and the road surface.

Treadwear indicators

Narrow bars (tread wear bars) that are distrib-

uted over the tire tread. If the tire tread is level

with the bars, the wear limit of á in (1.6 mm)

has been reached.

Occupant distribution

The distribution of occupants in a vehicle at their

designated seating positions.

Total load limit

Nominal load and luggage load plus 68 kg

(150 lbs) multiplied by the number of seats in

the vehicle.

Changing a wheel

Flat tire

The "Breakdown assistance" section

(Y page 241) contains information and notes on

how to deal with a flat tire. Information on driv-

ing with MOExtended tires in the event of a flat

tire can be found under "MOExtended tires (tires

with run-flat characteristics" (Y page 242).

Rotating the wheels

WARNING

Interchanging the front and rear wheels may

severely impair the driving characteristics if

the wheels or tires have different dimensions.

The wheel brakes or suspension components

may also be damaged. There is a risk of acci-

dent.

Rotate front and rear wheels only if the wheels

and tires are of the same dimensions.

On vehicles equipped with a tire pressure

monitor, electronic components are located

in the wheel.

Changing a wheel

275

Wheels and tires

Tire-mounting tools should not be used near

the valve. This could damage the electronic

components.

Only have tires changed at a qualified spe-

cialist workshop.

Observe the instructions and safety notes in the

"Changing a wheel" section (Y page 275).

The wear patterns on the front and rear tires

differ, depending on the operating conditions.

Rotate the wheels before a clear wear pattern

has formed on the tires. Front tires typically

wear more on the shoulders and the rear tires in

the center.

On vehicles that have the same size front and

rear wheels, you can rotate the wheels accord-

ing to the intervals in the tire manufacturer's

warranty book in your vehicle documents. If no

warranty book is available, the tires should be

rotated every 3,000 to 6,000 miles (5,000 to

10,000 km). Depending on tire wear, this may

be required earlier. Do not change the direction

of wheel rotation.

Clean the contact surfaces of the wheel and the

brake disc thoroughly every time a wheel is rota-

ted. Check the tire pressure and reactivate the

tire pressure monitor if necessary.

Direction of rotation

Tires with a specified direction of rotation have

additional benefits, e.g. if there is a risk of hydro-

planing. These advantages can only be gained if

the tires are installed corresponding to the

direction of rotation.

An arrow on the sidewall of the tire indicates its

correct direction of rotation.

Storing wheels

Store wheels that are not being used in a cool,

dry and preferably dark place. Protect the tires

against oil and grease.

Mounting a wheel

Preparing the vehicle

Stop the vehicle on solid, non-slippery and

level ground.

Apply the electric parking brake manually.

Bring the front wheels into the straight-ahead

position.

Shift the transmission to position P.

Switch off the drive system.

Vehicles without KEYLESS-GO: remove the

SmartKey from the ignition lock.

Vehicles with KEYLESS-GO: open the driv-

er's door.

The vehicle electronics now have status 0.

This is the same as the SmartKey having been

removed.

If included in the vehicle equipment, remove

the tire-change tool kit from the vehicle.

Safeguard the vehicle against rolling away

(Y page 128).

Securing the vehicle to prevent it from

rolling away

If your vehicle is equipped with a wheel chock, it

can be found in the tire-change tool kit

(Y page 241).

The folding wheel chock is an additional safety

measure to prevent the vehicle from rolling

away, for example when changing a wheel.

Fold both plates upwards :.

Fold out lower plate ;.

Guide the lugs on the lower plate fully into the

openings in base plate =.

276

Changing a wheel

Wheels and tires

Place chocks or other suitable items under

the front and rear of the wheel that is diago-

nally opposite the wheel you wish to change.

Raising the vehicle

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 jack-

ing point of the vehicle. The base of the jack

must be positioned vertically, directly under

the jacking point of the vehicle.

Position a suitable jack correctly on the

intended jacking points. If you fail to position

the jack correctly, the vehicle may be dam-

aged.

The jacking points are recesses in the lower

door sill. They can only be seen from under-

neath. There is one located behind each of the

front wheel arches and in front of the rear

wheel arches.

Position the jack in the jacking points so that

when viewed from the side, the jack is in the

vertical position.

Position a suitable jack only on the jacking

points intended for this purpose.

Never position the jack on the high-voltage

battery. Do not jack up the vehicle on the

high-voltage battery. There is otherwise a risk

of damaging the high-voltage battery.

Also observe the notes in the "Changing a

wheel" section.

Observe the following when raising the vehi-

cle:

To raise the vehicle, only use the vehicle-spe-

cific jack that has been tested and approved

by Mercedes-Benz. If used incorrectly, the

jack could tip over with the vehicle raised.

The jack is designed only to raise and hold the

vehicle for a short time while a wheel is being

changed. It must not be used for performing

maintenance work under the vehicle.

Avoid changing the wheel on uphill and down-

hill slopes.

Before raising the vehicle, secure it from roll-

ing away by applying the parking brake and

inserting wheel chocks. Do not disengage the

parking brake while the vehicle is raised.

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.

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.

Make sure that the distance between the

underside of the tires and the ground does not

exceed 1.2 in (3 cm).

Never place your hands and feet under the

raised vehicle.

Do not lie under the vehicle.

Do not start the drive system when the vehicle

is raised.

Never open or close a door or the tailgate

when the vehicle is raised.

Make sure that no persons are present in the

vehicle when the vehicle is raised.

Changing a wheel

277

Wheels and tires

Using lug wrench :, loosen the bolts on the

wheel you wish to change by about one full

turn. Do not unscrew the bolts completely.

Jacking points

The jacking points are located just behind the

front wheel housings and just in front of the rear

wheel housings (arrows).

Take ratchet wrench ? out of the vehicle tool

kit and place it on the hexagon nut of jack =

so that the letters AUF are visible.

Position jack = at jacking point ;.

Make sure the foot of the jack is directly

beneath the jacking point.

Turn ratchet wrench ? until jack = sits

completely on jacking point ; and the base

of the jack lies evenly on the ground.

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.

Unscrew the wheel bolts.

Remove the wheel.

Mounting a new wheel

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.

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.

Always pay attention to the instructions and

safety notes in the "Changing a wheel" section

(Y page 275).

Only use wheel bolts that have been designed

for the wheel and the vehicle. For safety rea-

sons, Mercedes-Benz recommends that you

only use wheel bolts which have been approved

for Mercedes-Benz vehicles and the respective

wheel.

To prevent damage to the paintwork, hold

the wheel securely against the wheel hub

while screwing in the first wheel bolt.

278

Changing a wheel

Wheels and tires

Clean the wheel and wheel hub contact sur-

faces.

Place the new wheel on the wheel hub and

push it on.

Tighten the wheel bolts until they are finger-

tight.

Lowering the vehicle

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.

Place the ratchet wrench onto the hexagon

nut of the jack so that the letters AB are visi-

ble.

Turn the ratchet wrench until the vehicle is

once again standing firmly on the ground.

Place the jack to one side.

Tighten the wheel bolts evenly in a crosswise

pattern in the sequence indicated (: to A).

The specified tightening torque is 96 lb-ft

(130 Nm).

Turn the jack back to its initial position.

Stow the jack and the rest of the vehicle tools

in the vehicle again.

Check the tire pressure of the newly mounted

wheel and adjust it if necessary.

Observe the recommended tire pressure

(Y page 260).

When you are driving with the emergency spare

wheel mounted, the tire pressure monitor can-

not function reliably. Only restart the tire pres-

sure monitor when the defective wheel has been

replaced with a new wheel. All wheels mounted

must be equipped with functioning sensors.

Vehicles with tire pressure monitor (USA

only): all mounted wheels must be equipped

with functioning sensors.

Wheel and tire combinations

General notes

You can ask for information regarding permitted

wheel/tire combinations at an authorized

Mercedes-Benz Center.

You should regularly check the pressure of the

emergency spare wheel, particularly prior to

long trips, and correct the pressure as neces-

sary (Y page 260). The value on the wheel is

valid.

For safety reasons, Mercedes-Benz recom-

mends that you only use tires and wheels

which have been approved by Mercedes-Benz

specifically for your vehicle.

These tires have been specially adapted for

use with the control systems, such as ABS or

ESP

, and are marked as follows:

MO = Mercedes-Benz Original

MOE = Mercedes-Benz Original Extended

(tires featuring run-flat characteristics)

MO1 = Mercedes-Benz Original (only cer-

tain AMG tires)

Mercedes-Benz Original Extended tires may

only be used on wheels that have been spe-

cifically approved by Mercedes-Benz.

Only use tires, wheels or accessories tested

and approved by Mercedes-Benz. Certain

characteristics, e.g. handling, vehicle noise

emissions or fuel consumption, may other-

Wheel and tire combinations

279

Wheels and tires

Wheels and tires -> Changing a wheel for Your Mercedes B Class SUV Second Generation (2011-2017)

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