MERCEDES-BENZ S CLASS 2023 Owners Manual

A"ser removing the towing eye, snap cover 1
into the bumper.*NOTE Damage to the vehicle due to incor-
rect use of the towing eye or trailer hitch
When a towing eye or trailer hitch is used to
recover a vehicle, the vehicle may be damaged
in the process.
Only use the towing eye or trailer hitch to
tow away or tow start the vehicle.Do not use the towing eye or trailer hitch
to tow the vehicle during recovery.
Tow-starting the vehicle (emergency engine start)
*NOTE Damage to the automatic transmis-
sion due to tow-starting
Tow-starting the vehicle can damage the auto-
matic transmission.
Do not tow-start the vehicle.Do not tow-start the vehicle.Electrical fuses
Notes on electrical fuses
&WARNING Risk of accident and injury due
to overloaded lines
If you manipulate or bridge a faulty fuse or if
you replace it with a fuse with a higher amper-
age, the electric line could be overloaded.
This could result in a "Nre.
Always replace faulty fuses with speci-
"Ned new fuses containing the correct
amperage.*NOTE Damage due to incorrect fuses
Using incorrect fuses can result in damage to
electrical components or systems or their functions being considerably restricted.
Use only fuses approved for Mercedes-
Benz with the respective speci"Ned fuse
rating.
Blown fuses must be replaced with fuses of the
same rating, which you can recognize by the color
and fuse rating. The fuse ratings and further infor-
mation to be observed can be found on the fuse
assignment diagram.
Fuse assignment diagram: in the vehicle docu-
ment wallet.*NOTE Damage or malfunctions caused by
moisture
Moisture may cause damage to the electrical
system or cause it to malfunction.
When the fuse box is open, make sure
that no moisture can enter the fuse box.When closing the fuse box, make sure
that the seal of the lid is positioned cor-
rectly on the fuse box.
If the newly inserted fuse also blows, have the cause traced and recti"Ned at a quali"Ned specialist
workshop.
Ensure the following before replacing a fuse: = The vehicle is secured against rolling away.
= All electrical consumers are switched o"M.
= The vehicle is switched o"M.
Breakdown assistance439

The electrical fuses are located in the following
fuse boxes:
= Fuse box on the driver\bs side of the engine
compartment (  page 440)
= Fuse box on the driver\bs side of the cockpit
(  page 442)
= Fuse box in the front passenger footwell
(  page 442)
= Fuse box in the trunk on the right-hand side of
the vehicle, when viewed in the direction of
travel (  page 442)
Opening and closing the fuse box in the engine
compartment
Requirements: = Observe the notes on electrical fuses
(  page 439).
= Have the following tools readily available:
- a dry cloth
- a screwdriver with an appropriate head
Opening\bDepending on the vehicle equipment, access
to the fuse box may be limited. Mercedes-
Benz recommends consulting a quali"Ned spe-
cialist workshop, e.g. an authorized
Mercedes-Benz Center.&WARNING Risk of injury from using the
windshield wipers when the hood is open
If the windshield wipers start moving when the
hood is open, you could be trapped by the wiper linkage.
Always switch o"M the windshield wipers
and vehicle before opening the hood.Release the rotary catches on cover 1 and
pull the cover up and out.Remove any existing moisture from the fuse
box using a dry cloth.Depending on the vehicle equipment, there may be an electrical component 2 on the
fuse box lid. If present, unscrew screw 3 and
put the component to the side without discon-
necting the electrical connection.440Breakdown assistance

If present, release hoses 4 from the retaining
clips on the fuse box and vehicle body.If present, release hoses 5 from the retaining
clips in the engine compartment and vehicle
body.Unscrew screws 6 and fold out bar 7.Unscrew screws 8 and remove fuse box lid
9 to the side.
Closing
Check whether the seal is positioned correctly
in lid 9.Place lid 9 on the fuse box and tighten
screws 8.Breakdown assistance441

Fold back bar 7 and tighten screws 6.If present, engage hoses 5 in the retaining
clips in the engine compartment and vehicle
body.If present, engage hoses 4 in the retaining
clips on the fuse box and vehicle body.If present, insert electrical component 2 into
the holder on the fuse box lid and tighten
screws 3.Insert cover 1 and engage the rotary
catches.
Opening and closing the fuse box in the cockpit
= Observe the notes on electrical fuses
(  page 439).
Fuse box 1 is on the driver\bs side on the side of
the cockpit under a cover.
Open cover 1 in the direction of the arrow
and remove it.Mercedes-Benz recommends you have the fuse box opened at an authorized Mercedes-
Benz Center.
Opening and closing the fuse box in the front
passenger footwell
Requirements
= Observe the notes on electrical fuses
(  page 439).
Open cover 1 in the direction of the arrow
and remove it.
Opening and closing the fuse box in the trunk
Requirements: = Observe the notes on electrical fuses
(  page 439).
442Breakdown assistance

Fold cover 1 down in the direction of the
arrow.Breakdown assistance443

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 quali"Ned 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
insu"Pcient tire tread
*nsu"Pcient 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 on the front wheels, they may drag against the vehicle
body or chassis components.
Never install snow chains on the front
wheels.Only install snow chains on the rear
wheels in pairs.*NOTE Damage to components of the vehi-
cle body or chassis due to mounted snow
chains
If you mount snow chains to the front wheels
of 4MATIC vehicles, you may damage compo-
nents of the vehicle body or chassis.
Only mount snow chains to the rear
wheels of 4MATIC vehicles.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 Service Center.
= For safety reasons, only use snow chains that
have been speci"Ncally approved for your vehi-
cle by Mercedes-Benz, or snow chains with the same quality standard.
= Comply with the installation instructions of the
snow chain manufacturer.
= 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.
= Vehicles with level control: if snow chains are
installed, only drive at raised vehicle level
(  page 291).
= Vehicles with rear axle steering: if snow chains
are installed, only drive with snow chain mode
active (  page 445).\bYou can deactivate ESP n
to pull away
(  page 257). This allows the wheels to spin,
achieving an increased driving force.
Activating or deactivating snow chain mode
Multimedia system: 4 © 5
ß 5
Z
Activate or deactivate Snow Chain Mode.
When the function is active, the vehicle behaves
as if snow chains were installed. For example, the
maximum steering movement of the rear wheels
is limited and the turning circle is thus increased.
Additionally, parts of the driving and driving safety
systems are not available when snow chain mode
is active.
Wheels and tires445

Tire pressure
Notes on tire pressure
&WARNING Risk of accident due to insu"P-
cient or excessive tire pressure
Underin"Oated or overin"Oated 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:
= Monthly
= When the load changes
= Before embarking on a longer journey
=
If operating conditions change, e.g. o"M-
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 a"Mect 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 su"Mer from irregular
wear, which can signi"Ncantly 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 su"Mer from irregular
wear, which can signi"Ncantly 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
446Wheels and tires

&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 quali"Ned 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!

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 de"Nned in the table for di"Merent num-
bers of passengers and amounts of luggage. The actual number of seats may di"Mer from this.
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 458).
= Tire and loading information placard
(  page 451)
= Maximum tire pressure (  page 457)
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 446)
= Tire pressure table (  page 447)
448Wheels and tires