Get Wheels and tyres -> Tyre pressure Guide for Mercedes C Class 4 Door Fourth Generation (2014-2021)

410 Wheels and tyres

% You can permanently limit the maximum

vehicle speed for driving with winter tyres

(/ page 196).

Never fit snow chains on the front

Comply with the recommended tyre

pressure and check the tyre pressure of

all tyres including the spare wheel regu‐

larly:

at least once a month

when the load changes

before embarking on a longer journey

if operating conditions change, e.g. off-

road driving

wheels.

Only fit snow chains on the rear wheels

in pairs.

You can deactivate ESP^®to pull away

(/ page 187). This allows the wheels to

spin, achieving an increased driving force.

Observe the following notes when using snow

chains:

Snow chains are only permissible for certain

Tyre pressure

Notes on tyre pressure

wheel/tyre combinations. You can obtain

information about this from a Mercedes-Benz

Service Centre.

Adjust the tyre pressure as necessary.

WARNING Risk of accident due to insuf‐

ficient or excessive tyre pressure

For safety reasons, only use snow chains that

Tyre pressure which is too high or too low can:

have been specifically approved for your

vehicle by Mercedes-Benz, or snow chains

with the same quality standard.

Underinflated or overinflated tyres pose the

following risks:

Shorten the service life of the tyres.

Cause increased tyre damage.

The tyres may burst, especially as the

load and vehicle speed increase.

If snow chains are fitted, the maximum per‐

missible speed is 50 km/h.

Adversely affect driving characteristics and

thus driving safety, e.g. due to aquaplaning.

The tyres may wear excessively and/or

Vehicles with Active Parking Assist: do

unevenly, which may greatly impair tyre

traction.

not use Active Parking Assist when snow

chains are fitted.

WARNING Risk of accident from repea‐

ted tyre pressure drop

The driving characteristics, as well as

Vehicles with level control: if snow chains

If the tyre pressure drops repeatedly, the

wheel, valve or tyre may be damaged.

steering and braking, may be greatly

impaired.

are fitted, only drive at raised vehicle level .

Wheels and tyres 411

The vehicle's tyres heat up when driving. As the

temperature of the tyres increases, so too does

the tyre pressure.

Vehicles with a tyre pressure monitoring sys‐

tem: you can also check the tyre pressure using

the on-board computer.

Insufficient tyre pressure can cause the tyres

to burst.

Inspect the tyre for signs of foreign

objects.

Check whether the wheel or valve has a

leak.

Notes on trailer operation

If you are unable to rectify the damage,

contact a qualified specialist workshop.

Always inflate the rear axle tyres to the recom‐

mended tyre pressures on the tyre pressure

table for increased load.

Information on the recommended tyre pressure

for the vehicle's factory-fitted tyres can be found

on the tyre pressure table on the inside of the

fuel filler flap (/ page 411).

Use a suitable pressure gauge to check the tyre

pressure. The outer appearance of a tyre does

not permit any reliable conclusion about the tyre

pressure.

Tyre pressure table

The tyre pressure table is on the inside of the

fuel filler flap.

If one or more tyre sizes precede a tyre pres‐

sure, the following tyre pressure information is

only valid for those tyre sizes and their respec‐

tive load condition.

If the preceding tyre sizes are complemented by

the + symbol, the tyre pressure information

following shows alternative tyre pressures. Fuel

consumption may then increase slightly.

Only correct tyre pressures when the tyres are

cold. Conditions for cold tyres:

The vehicle has been parked with the tyres

out of direct sunlight for at least three hours.

The vehicle has travelled less than 1.6 km.

412 Wheels and tyres

The load conditions "partially laden" and "fully

laden" are defined in the table for different num‐

bers of passengers and amounts of luggage. The

actual number of seats may differ from this.

pressure to the recommended cold tyre pressure On-board computer:

suitable for the operating situation.

Service

Tyres

In most cases, the tyre pressure monitoring sys‐

tem will automatically update the new reference

values after you have changed the tyre pressure.

You can, however, also update the reference val‐

ues by restarting the tyre pressure monitoring

One of the following displays appears:

Current tyre pressure and tyre temperature

of the individual wheels:

Tyre pressure monitoring system

Function of the tyre pressure monitoring sys‐ system manually (/ page 512).

tem

The system checks the tyre pressure and the

tyre temperature of the tyres fitted to the vehicle

by means of a tyre pressure sensor.

System limits

The system may be impaired or may not function

in the following situations:

the tyre pressure has been set incorrectly

there is a sudden pressure loss caused, for

example, by a foreign object penetrating the

tyre

there is a malfunction caused by another

radio signal source

The tyre pressure and the tyre temperature

appear in the multifunction display

(/ page 412).

If there is a substantial pressure loss or if the

tyre temperature is excessive, you will be

warned in the following ways:

Tyre pressures will be displayed after a few

minutes of driving

via display messages (/ page 490)

Tyre pressure monitor active: the teach-in

Checking the tyre pressure with the tyre

pressure monitoring system

Requirements:

process of the system is not yet complete.

The tyre pressures are already being moni‐

tored.

via the h warning lamp in the instrument

cluster

The ignition is switched on.

The tyre pressure monitoring system is only an

aid. It is the driver's responsibility to set the tyre

Compare the tyre pressure with the recom‐

mended tyre pressure for the current operat‐

Wheels and tyres -> Tyre pressure for Your Mercedes C Class 4 Door Fourth Generation (2014-2021)

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