MERCEDES-BENZ CLA 2023 Owners Manual

Notes on noise or unusual handling characteris-tics
Make sure there are no vibrations, noises or unusual handling characteristics when the vehicle
is in motion. This may indicate that the wheels or
tires are damaged. Hidden tire damage could also
be causing the unusual handling characteristics.
If you suspect that a tire is defective, reduce yourspeed immediately and have the tires and wheels
checked at a qualiNed specialist workshop.
Notes on regularly inspecting wheels and tires
&WARNING Risk of injury through damaged
tires
Damaged tires can cause tire pressure loss.
Check the tires regularly for signs of
damage and replace any damaged tires immediately.&WARNING Risk of hydroplaning due to
insuPcient tire tread
*nsuPcient tire tread will result in reduced tire
grip.
In heavy rain or slush the risk of hydroplaning is increased, in particular where speed is not
adapted to suit the conditions.
Thus, you should regularly check the
tread depth and the condition of the
tread across the entire width of all tires.
Minimum tread depth for:
= Summer tires:

Notes on snow chains&WARNING Risk of accident due to incor-
rectly installed snow chains
If you have installed snow chains to the rear
wheels, they may drag against the vehicle
body or chassis components.
Never install snow chains on the rear
wheels.Only install snow chains on the front
wheels in pairs.*NOTE Damage to vehicle body or suspen-
sion components caused by installed
snow chains
On 4MATIC vehicles, if you install snow chains
on the rear wheels, you can damage vehicle
body or suspension components.
On 4MATIC vehicles, only install snow
chains on the front wheels.*NOTE Damage to the wheel trim from
mounted snow chains
If snow chains are mounted to steel wheels,
the wheel trims can be damaged.
Remove the wheel trims of steel wheels before mounting snow chains.
Observe the following notes when using snow
chains:
= Snow chains are only permissible for certain
wheel/tire combinations. You can obtain infor-
mation about this from an authorized
Mercedes-Benz Center.
= For safety reasons, only use snow chains that
have been speciNcally approved for your vehi-
cle by Mercedes-Benz, or snow chains with
the same quality standard.
= If snow chains are installed, the maximum per-
missible speed is 30 mph (50 km/h).
= Vehicles with Active Parking Assist: do not use
Active Parking Assist when snow chains are
installed.
\bYou can deactivate ESP n
to pull away
(  page 163). This allows the wheels to spin,
achieving an increased driving force.
Tire pressure
Notes on tire pressure
&WARNING Risk of accident due to insuP-
cient or excessive tire pressure
UnderinOated or overinOated tires pose in par-
ticular the following risks:
= The tires can burst.
= The tires can wear excessively and/or
unevenly.
= The driving characteristics as well as the
steering and braking characteristics may
be greatly impaired.
Comply with the recommended tire pres-
sures and check the tire pressure of all
tires, including the spare wheel, regu-
larly:300Wheels and tires

=Monthly
= When the load changes
= Before embarking on a longer journey
= If operating conditions change, e.g. oM-
road drivingAdjust the tire pressure, if necessary.
Tire pressure which is too high or too low can:
= Shorten the service life of the tires.
= Cause increased tire damage.
= Adversely aMect driving characteristics and
thus driving safety, e.g. due to hydroplaning.
&WARNING Risk of accident due to too low
a tire pressure
Tires with pressure that is too low can over-
heat and burst as a consequence.
In addition, they also suMer from irregular
wear, which can signiNcantly impair the brak-
ing properties and the handling characteris-
tics.
Avoid excessively low tire pressure.Tire pressure which is too low can cause:
= Tire defects as a result of overheating
= Impaired handling characteristics
= Irregular wear
= Increased fuel consumption&WARNING Risk of accident due to too high
a tire pressure
Tires with excessively high pressure can burst.
In addition, they also suMer from irregular
wear, which can signiNcantly impair the brak-
ing properties and the handling characteris-
tics.
Avoid excessively high tire pressures.
Tire pressure which is too high can cause:
= Increased braking distance
= Impaired handling characteristics
= Irregular wear
= Impaired driving comfort
= Susceptibility to damage
&WARNING Risk of accident due to repea-
ted pressure drop in the tires
The wheels, valves or tires could be damaged.
Too low a tire pressure can lead to the tires
bursting.
Examine the tires for foreign objects.Check whether the tire has a puncture or
the valve has a leak.If you are unable to rectify the damage,
contact a qualiNed specialist workshop.
You can Nnd information on tire pressure for the
vehicle\bs factory-installed tires on the following
labels:
= Tire and loading information placard on the
B!

permit any reliable conclusion about the tire pres-
sure.
Only correct the tire pressure when the tires are
cold. Conditions for cold tires:
= The vehicle has been parked with the tires out
of direct sunlight for at least three hours.
= The vehicle has traveled less than 1 mile
(1.6 km).
The vehicle\bs tires heat up when driving. As the temperature of the tires increases, so too does
the tire pressure.
Vehicles with a tire pressure monitoring system: you can also check the tire pressure using the on- board computer (  page 304).
The tire pressure recommended for increased
load/speed in the tire pressure table can aMect
the ride comfort.&WARNING Risk of accident due to unsuita-
ble accessories on tire valves
If you mount unsuitable accessories onto tire
valves, the tire valves may be overloaded and
malfunction, which can cause tire pressure
loss.Only screw standard valve caps or valve
caps speciNcally approved by Mercedes-
Benz for your vehicle onto the tire valve.
Tire pressure table
The tire pressure table is on the inside of the fuel Nller Oap.
\bThe data shown in the images is example
data.The tire pressure table shows the recommended
tire pressure for all tires approved for this vehicle.
The recommended tire pressures are valid for
cold tires under various operating conditions
according to the load and/or speed of the vehi- cle.
If one or more tire sizes precede a tire pressure,
the following tire pressure information is only valid for those tire sizes and their respective load con-
dition.
The load conditions "partially laden" and "fully
laden" are deNned in the table for diMerent num-
bers of passengers and amounts of luggage. The actual number of seats may diMer from this.302Wheels and tires

Some tire pressure tables only show the rim diam-eter instead of the complete tire size, e.g. R18.
The rim diameter is part of the tire size and can
be found on the tire side wall (  page 314).
= Tire and loading information placard
(  page 307)
= Maximum tire pressure (  page 313)
Checking the tire pressure manuallyRead the tire pressure recommended for the
current operating conditions from the tire and
loading information placard or the tire pres-
sure table. Observe the notes on tire pressure.Remove the valve cap of the tire to be
checked.Press the tire pressure gauge securely onto the valve.Read the tire pressure.If the tire pressure is lower than the recom-
mended value, increase the tire pressure to
the recommended value.If the tire pressure is higher than the recom- mended value, release air. To do so, press
down the metal pin in the valve, e.g. using the
tip of a pen. Then check the tire pressure
again using the tire pressure gauge.Screw the valve cap onto the valve.
Further related subjects:
= Notes on tire pressure (  page 300)
= Tire pressure table (  page 302)
=
Tire and loading information placard
(  page 307)
Tire pressure monitoring system

qFunction of the tire pressure monitor
&DANGER Risk of accident due to incorrect
tire pressure
Each tire, including the spare (if provided),
should be checked monthly when cold and
inOated to the inOation pressure recommen-
ded by the vehicle manufacturer on the vehi-
cle placard or tire inOation pressure label. (If
your vehicle has tires of a diMerent size than
the size indicated on the vehicle placard or
tire inOation pressure label, you should deter-
mine the proper tire inOation pressure for
those tires.)
As an added safety feature, your vehicle has
been equipped with a tire pressure monitoring system (TPMS) that illuminates a low tire pres-sure telltale when one or more of your tires is
signiNcantly under-inOated. Accordingly, when
Wheels and tires303

the low tire pressure telltale illuminates, you
should stop and check your tires as soon as
possible, and inOate them to the proper pres-
sure. Driving on a signiNcantly under-inOated
tire causes the tire to overheat and can lead
to tire failure. Under-inOation also reduces fuel
ePciency and tire tread life, and may aMect
the vehicle!

On-board computer:4 Service 5
Tires
One of the following displays will appear: = Current tire pressure and tire temperature on
the individual wheels:
= Tire pressure will be displayed after driving a
few minutes
= Tire Pressure Monitor Active : the teach-in
process of the system is not yet complete. The
tire pressures are already being monitored.
Compare the tire pressure with the recom-
mended tire pressure for the current operatingcondition (  page 302). Additionally, observe
the notes on cold tires (  page 300).\bThe values displayed in the on-board com-
puter may deviate from those of the tire pres-
sure gauge as they refer to sea level. At high
elevations, the tire pressure values indicated by a pressure gauge will be higher than thoseshown by the on-board computer. In this case,do not reduce the tire pressure.

q Restarting the tire pressure monitoring system
Requirements
= The recommended tire pressure is correctly
set for the respective operating status on all of
the wheels (  page 300).
Restart the tire pressure monitoring system in the
following situations:
= The tire pressure has changed.
= The wheels or tires have been changed or
newly Ntted.
On-board computer:
4 Service 5
TiresSwipe downwards on Touch Control on the
les-hand side of the steering wheel.
The Use Current Pressures as New Refer-
ence Values message will be shown on the
instrument display.To restart, press Touch Control on the les-
hand side of the steering wheel.
The Tire Press. Monitor Restarted message
will be shown on the instrument display.
Current warning messages will be deleted and
the yellow w warning lamp will go out.
Aser you have been driving for a few minutes,
the system will check whether the current tire
pressures are within the speciNed range. The
current tire pressures will then be accepted as
reference values and monitored.
Be sure also to pay attention to the following rela-
ted topic:
= Notes on tire pressure (  page 300)
Wheels and tires305

Tire pressure loss warning system

qFunction of the tire pressure loss warning sys-
tem
The tire pressure loss warning system warns the driver by means of display messages when there
is a severe tire pressure loss.
System limits
The system may be impaired or may not function particularly in the following situations:
= incorrect reference values were taught in
= sudden pressure loss caused by a foreign
object penetrating the tire, for example
= an even pressure loss on more than one tire
occurs
The system has a restricted or delayed function particularly in the following situations:
= poor ground conditions, e.g. snow or gravel
= driving with snow chains
= when adopting a very sporty driving style with
high cornering speeds or sudden acceleration
= driving with a high load
The tire pressure loss warning system is only an
aid. It is the driver\bs responsibility to set the tire
pressure to the recommended cold tire pressure
suitable for the operating situation and to check it.
Be sure to also observe the following further rela-
ted subjects:
= Notes on tire pressure (  page 300)
= Display messages about the tires
(  page 384)

q Restarting the tire pressure loss warning sys-
tem
Requirements
= The recommended tire pressure is correctly
set for the respective operating status on all
wheels.
Restart the tire pressure loss warning system in the following situations:
= The tire pressure has changed.
= The wheels or tires have been changed or
newly Ntted.On-board computer:
4 Service 5
TiresSwipe downwards on Touch Control on the
les-hand side of the steering wheel.
The Tire Pressure Control System Active
Restart message will be shown on the display.To begin restart, press Touch Control on the
les-hand side of the steering wheel.
The Tire Pressure Now OK" message will be
shown on the display.Select Yes .To conNrm restart, press Touch Control on the
les-hand side of the steering wheel.
The Run Flat Indicator Restarted message will
be shown on the display.
Aser you have driven for a few minutes, the
tire pressure loss warning system will monitor
the set pressures of all the tires.
Be sure also to pay attention to the following rela-
ted topic:
= Notes on tire pressure (  page 300)
306Wheels and tires

Loading the vehicle
Notes on Tire and Loading Information placard
&WARNING Risk of accident from overloa-
ded tires
Overloaded tires may overheat and burst as a
consequence. Overloaded tires can also
impair the steering and handling characteris-
tics and lead to brake failure.
Observe the load rating of the tires.The load rating must be at least half the
permissible axle load of the vehicle.Never overload the tires by exceeding
the maximum load.
The Tire and Loading Information placard is on the
B-pillar on the driver\bs side of the vehicle.
1Tire and Loading Information placard\bThe data shown in the illustration is example
data.
The Tire and Loading Information placard shows
the following information:
= Maximum number of seats 2 according to
the maximum number of people permitted to
travel in the vehicle.
Wheels and tires307

=Maximum permissible load 3 comprises the
gross weight of all vehicle occupants, load and luggage.
= Recommended tire pressure 1 for cold tires.
The recommended tire pressures are valid for
the maximum permissible load and up to the maximum permissible vehicle speed.
Please also note: = Information on permissible weights and loads
on the vehicle identiNcation plate
(  page 333).
= Information on tire pressure in the tire pres-
sure table (  page 302).
Further related subjects:
= Determining the maximum permissible load
(  page 308)
= Notes on tire pressure (  page 300).
Steps for Determining Correct Load Limit
The following steps have been developed as
required of all manufacturers under Title 49, Code
of U.S. Federal Regulations, Part 575, pursuant to
the "National TraPc and Motor Vehicle Safety Act
of 1966".(1): Locate the statement !