MERCEDES-BENZ C-CLASS SALOON 2022 Owners Manual

%
Aser you pull away with optimised accelera-
tion, components of the drivetrain can
become very hot, which means that optimised
acceleration values may be reached again
only aser a few minutes. Notes on driving
&
WARNING Risk of accident due t
o objects
in the driver's footwell
Objects in the driver's footwell may impede
pedal tr
avel or block a depressed pedal.
This jeopardises the operating and road safety
of the vehicle. 
Stow all objects in the vehicle securely
so t
hat they cannot get into the driver's
footwell. 
Always Nt t
he Ooor mats securely and as
prescribed in order to ensure that there
is always suPcient room for the pedals. 
Do not use loose Ooor mats and do no
t
place Ooor mats on top of one another. &
WARNING Risk of accident due t
o incor-
rect footwear
Incorrect footwear includes, for example: = shoes wit

h platform soles
= shoes with high heels
= slippers
There is a risk of an accident. 
Always wear suitable footwear so that
y

ou can operate the pedals safely. &
WARNING Risk of accident if t
he vehicle is
switched oM while driving
If you switch oM t
he vehicle while driving,
safety functions are restricted or no longer
available.
This may aMect the power steering system and
the brake force boosting, for example.
You will need to use considerably more force
to steer and brake, for example. 
Do not switch oM t
he vehicle while driv-
ing. &
DANGER Risk of f
atal injuries due to
exhaust gases
Combustion engines emit poisonous exhaust
g
ases such as carbon monoxide. Breathing in
these exhaust gases is hazardous to health
and results in poisoning. 
Never leave the engine and, if present,
t

he stationary heater, running in an
enclosed space without suPcient venti-
lation. &
WARNING Risk of skidding and of an acci-
dent due t
o shising down on slippery road
surfaces
If you shis do
wn on slippery road surfaces to
increase the engine braking eMect, the drive
wheels may lose traction. 
Do not shis do
wn on slippery road surfa-
ces to increase the engine braking
eMect. 178
Driving and parking

&
DANGER Risk of f atal injury due to poison-
ous exhaust gases
If the tailpipe is blocked or suPcient v
entila-
tion is not possible, poisonous exhaust gases
such as carbon monoxide may enter the vehi-
cle. This is the case, for example, if the vehicle
gets stuck in the snow. 
Keep the tailpipe and the area around
t

he vehicle free from snow when the
engine or the stationary heater is run-
ning. 
Open a window on the side of the vehicle
f

acing away from the wind to ensure an
adequate supply of fresh air. &
WARNING Risk of accident due t
o the
brake system overheating
If you leave your foot on the brake pedal when
dr
iving, the brake system may overheat.
This increases the braking distance and the
brake system can even fail. 
Never use the brake pedal as a footrest. 
Do not depress the brake pedal and the
acceler
ator pedal at the same time while
driving. *
NOTE Engine damag
e due to excessively
high engine speeds The engine will be damaged if you drive with
t

he engine in the overrevving range. 
Do not drive with the engine in the over-
r
evving range. *
NOTE Causing w
ear to the brake linings by
permanently depressing the brake pedal 
Do not permanently depress the brake
pedal while dr

iving. 
To use braking eMect of t
he engine, shis
to a lower gear in good time. *
NOTE Damag
e to the drivetrain and
engine when pulling away 
Do not warm up the engine while the
v

ehicle is stationary. Pull away immedi-
ately. 
Avoid high engine speeds and driving at
full t

hrottle until the engine has reached
its operating temperature. *
NOTE Damag
e to the catalytic converter
due to non-combusted fuel The engine is not running smoothly and is mis-
Nr

ing.
Non-combusted fuel may get into the catalytic
converter. 
Only depress the accelerator pedal
slightl

y. 
Have the cause r
ectiNed immediately at
a qualiNed specialist workshop. Driving and parking
179

*
NOTE Reduced battery life due to frequent
short-distance trips The 12 V battery may not be
suPcientl
y
charged when the vehicle is used only for
short-distance trips. This reduces the life of
the battery. 
Drive longer distances regularly to
c

harge the battery. *
NOTE Damag
e to the vehicle due to not
observing the maximum permitted head-
room clearance If the vehicle height is greater than the maxi-
mum per
mitted headroom clearance, the roof
and other parts of the vehicle may be dam-
aged. 
Observe the signposted headroom clear-
ance. 
If the vehicle height is greater than the
per
mitted headroom clearance, do not
enter. 
Observe the changed vehicle height with
add-on r
oof equipment. Notes on driving with a roof load, trailer or fully
laden v
ehicle
When driving with a loaded roof luggage rack or
trailer as well as with a fully laden or fully occu-
pied vehicle, the vehicle's driving and steering
characteristics change.
You should bear the following in mind:
= Do not exceed the permissible roof load and
towing capacity. Also observe the technical
data in the printed Owner's Manual.
= Evenly distribute the roof load, and place
heavy objects at the bottom. Also comply with
the notes on loading the vehicle
( page 121).
= Drive attentively, and avoid suddenly pulling
away, braking and steering as well as rapid
cornering.
Notes on driving on salt-treated roads
The braking eMect is limited on salt-treated roads. Therefore, observe the following notes:
= due t

o salt build-up on the brake disks and
brakepads, the braking distance can increase
considerably or result in braking only on one
side
= maintain a much greater safe distance to the
vehicle in front
To remove salt build-up: = brake occasionally while paying attention to
the traPc conditions
= carefully depress the brake pedal at the end of
the journey and when starting the next jour-
ney
Notes on aquaplaning
Aquaplaning can take place once a certain
amount of water has accumulated on the road
surface.
Observe the following notes during heavy precipi-
tation or in conditions in which aquaplaning may
occur:
= reduce speed
= avoid tyre ruts 180
Driving and parking

=
a void sudden steering movements
= brake carefully
% Also observe the notes on regularly checking
wheels and tyr

es ( page 412).
Notes on driving through water on the road sur-
f
ace
Water which has entered into the vehicle can
damage the engine, electrics and transmission.
Water can also enter the air intake of the engine
and cause engine damage.
Observe the following if you must drive through
water:
= The water, when calm, may only reach the
lower edge of the vehicle body.
= Drive at a maximum speed of 10 km/h; water
can otherwise enter the vehicle interior or
engine compartment.
= Vehicles travelling in front, or oncoming vehi-
cles, can create waves which may exceed the
maximum permissible depth of the water.
The braking eMect of the brakes is reduced aser
fording. Brake carefully while paying attention to the
tr
aPc conditions until braking power has been
fully restored. Function of rear axle steering
%
This function is an on-demand feature
(  pag

e 22).
The rear axle steering is an electromechanical
auxiliar
y steering on the rear axle which adjusts
the steering of the rear wheels according to the
position of the front wheels, depending on the
speed. This results in greater manoeuvrability and
improved driving stability, e.g. when cornering. ECO start/stop function
ECO start/stop function
% Plug-in hybrid: t
his function is not available.
% Depending on the engine, the ECO start/stop
function is no
t available in all drive programs.
Observe the status display on the driver's dis-
play concerning this. The engine will be switched
oM aut
omatically in
the following situations if all vehicle conditions for
an automatic engine stop are met:
= You brake the vehicle to a standstill in trans-
mission position h or i.
= You depress the brake pedal when travelling at
a low speed.
If the system has detected one of the following
situations, the engine will not stop:
= You stop at a stop sign and there is no vehicle
in front of you.
= The vehicle that stopped in front of you starts
up again.
= You manoeuvre, turn the steering wheel
sharply or engage reverse gear.
% If the system detects an intelligent stop inhibi-
t

or, e.g. a stop sign, the engine will not stop.
If you activate the HOLD function or engage
the park position j, the engine can be
switched oM in spite of an intelligent stop
inhibitor. Driving and parking
181

The engine will restart automatically in the follow-
ing cases:
= Y
ou engage transmission position h or k.
= You depress the accelerator pedal.
= The vehicle requires an automatic engine
start.
= You release the brake pedal.
= You release the brake pedal on a downhill gra-
dient and the vehicle does not roll.
= The vehicle rolls on a downhill gradient and
does not automatically enter glide mode at
20 km/h.
Displaying the ECO start/stop function on the
driver's display:
= The è symbol (green) appears when the
vehicle is at a standstill: the engine was
switched oM by the ECO start/stop function.
= The ç symbol (yellow) appears when the
vehicle is at a standstill: not all vehicle condi-
tions for an engine stop have been met.
= Neither the è symbol nor the ç symbol
appears when the vehicle is at a standstill: an intelligent stop inhibitor, e.g. a stop sign, has
been de
tected.
= The X symbol appears: the ECO start/stop
function is deactivated or there is a malfunc-
tion.
If the engine was switched oM by the ECO start/
stop function and you leave the vehicle, a warning
tone will sound and the engine will not be restar-
ted. In addition, the following display message will
appear on the driver's display:
Vehicle is operational Switch off vehicle before
exiting
If you do not switch oM the vehicle, it will automat-
ically be switched oM aser three minutes.
Switching the ECO start/stop function on/oM
* NOTE Mer
cedes-AMG vehicles 
Observe the notes in the Supplement.
Y
ou could otherwise fail to recognise
dangers. 
Press button 1.
A displa

y will appear on the driver's display
when you switch the ECO start/stop function
on/oM.
% X will be continuousl
y shown on the driv-
er's display while the ECO start/stop function
is deactivated. 182
Driving and parking

ECO display function
The ECO display shows an evaluation of your driv-
ing s
tyle on the driver's display depending on the
situation. This enables you to check the ePciency
of your driving style and adjust it if necessary. The
ECO display menu shows a ball 2 that will roll
forwards or backwards on a stylised road in the
direction of travel according to the driving charac-
teristics.
Above and below the road, lines mark the area for
an ePcient driving style 3. Ball 2 will light up in
green if it is rolling within these lines. Outside the
lines, the ball will light up in orange. The ECO display assesses the following criteria for
an economical dr
iving style:
= coasting at the right times
= consistent speed
= moderate acceleration
The overall assessment of your driving style "from
start" is indicated using stars 1. It starts with
Nve empty stars, which you can Nll one aser the
other if you drive ePciently. When all Nve stars are
Nlled, a glow will appear in the background.
% You can call up the ECO display function via
t
he Classic menu ( page 303). ECO Assist function (vehicles with 48 V on-board
electr

ical system) For plug-in hybrids, note the ECO Assist informa-
tion ( pag

e 186).
% ECO Assist is active only in drive pro-
g

rams  and A.
ECO Assist analyses data for the vehicle's expec-
t
ed route. This allows the system to optimally
adjust the driving style for the route ahead, save fuel and recuperate. If the system detects an
e
vent ahead and the vehicle nears the event, ECO
Assist will calculate the optimum speed for maxi-
mum fuel economy and recuperative energy
based on the distance, speed and downhill gradi-
ent.
If the deceleration provided by ECO Assist is not
suPcient, you must also brake with the service
brake. This is especially the case if, for example,
you pull away again in slow-moving traPc and the
distance to the vehicle in front is very short. 1
"Foot oM t
he accelerator" recommendation
2 Route event ahead Driving and parking
183

If a route event that can be dealt with more
eP-
cientl y by adjusting your driving style is detected
ahead, corresponding symbol 2 and the

charge the high-voltage battery while driving. As
soon as y ou take your foot oM the accelerator
pedal when the vehicle is in motion and in trans-
mission position h, recuperation in overrun
mode is initiated.
The higher the recuperation, the more sharply the
vehicle is braked when coasting and the more
electrical energy is fed into the high-voltage bat-
tery.
The deceleration in overrun mode may not be suf-
ficient depending on the driving conditions.
Decelerating to a standstill is not possible. Also
brake with the service brake if necessary. Always
adapt your speed to the driving conditions and
keep a suPcient distance.
The recuperative brake system has the following
characteristics: = supports braking with electronically controlled
brake force boosting
= converts the kinetic energy of the vehicle into
electric energy
% If you brake hard, the mechanical brake is
also used. This means t
hat the maximum recuperative energy cannot be recovered. The
mor
e you drive and brake in an anticipatory
manner, the more ePciently energy can be
recuperated.
System limits
The br
aking eMect of the electric motor during
recuperation in overrun mode may be reduced or
may not be available at all in the following situa-
tions:
= when the high-voltage battery charge level
increases
= if the high-voltage battery is not yet at a nor-
mal operating temperature
In these cases, the desired deceleration is set by
the brake control system.
Manually setting recuperative deceleration
% You can use the steering wheel g
earshis pad-
dles to adjust the intensity of recuperation in
the n, o and

%
hX is onl y available if the ECO Assist
function is activated in the multimedia system
and if the function of the radar sensors is not
impaired. Also observe the information on
vehicle sensors and cameras in the vehicle
Owner's Manual. 
To increase recuperation: br
ieOy pull gearshis
paddle 1. 
To reduce recuperation: br
ieOy pull gearshis
paddle 2. 
Standard setting: pull and hold g
earshis pad-
dle 1 or 2 or engage transmission position
h again.
% When the vehicle is started again, the stand-
ar
d setting is also set.
The driver's display shows the currently selected
r
ecuperation level next to the transmission posi-
tion display. ECO Assist (plug-in hybrid)
ECO Assist function
%
The following function depends on the equip-
ment and t

he country. ECO Assist analyses data for the vehicle's expec-
t

ed route. This allows the system to optimally
adjust the driving style for the route ahead, save
fuel and recuperate. If the system detects an
event ahead and the vehicle nears the event, ECO
Assist will calculate the optimum speed for maxi-
mum fuel economy and recuperative energy
based on the distance, speed and downhill gradi-
ent.
If the deceleration provided by ECO Assist is not
suPcient, you must also brake with the service
brake. This applies in particular if, for example,
you pull back into traPc and the distance to the
vehicle in front is very short.
The function will be active in the following circum-
stances:
= The function is activated in the multimedia
system (  page 187).
= The hX recuperation level is selected
( page 185).
= p manual gearshising is not activated.
= Drive program C or B is not selected. 1
"Foot oM t
he accelerator" recommendation
2 Route event ahead
If a route event that can be dealt with more eP-
cientl
y by adjusting your driving style is detected
ahead, corresponding symbol 2 and the

The following route events can be detected by
EC
O Assist:
3 Roundabout
4 S-bend
5 Sharp bend
6 T-junction
7 Downhill gradient
8 Vehicle in front
9 Speed limit
% Depending on the vehicle equipment, not all
futur

e route events may be detected by the
system. System limits
If t

he calculated route is adhered to when route
guidance is active, ECO Assist will operate with
greater accuracy. The basic function is also availa-
ble without active route guidance. Not all informa-
tion and traPc situations can be foreseen. The
quality depends on the map data.
ECO Assist is only an aid. The driver is responsible
for keeping a safe distance from the vehicle in
front, for vehicle speed and for braking in good
time.
The system may be impaired or may not function
in the following situations:
= If there is poor visibility, e.g. due to insuPcient
illumination of the road, highly variable shade
conditions, rain, snow, fog or heavy spray.
= If there is glare, e.g. from oncoming traPc,
direct sunlight or reOections.
= If there is dirt on the windscreen in the vicinity
of the multifunction camera or if the camera is
misted up, damaged or obscured.
= If the radar sensors are dirty or damaged. =
If t he traPc signs are hard to detect, e.g. due
to dirt, snow or insuPcient lighting, or
because they are covered.
= If the information in the navigation system's
digital map is incorrect or out of date.
= If signs are ambiguous, e.g. road signs in road-
works or in adjacent lanes.
Activating or deactivating ECO Assist
Multimedia system: 4 © 5
Settings 5
Assistance
5 Driving 
Activate or deactivate the function. Function of the route-based operating-mode strat-
egy (plug-in h

ybrid) %
The following function is country-dependent
and a

vailable only in conjunction with an inte-
grated navigation system.
The route-based operating-mode strategy is active
under t
he following conditions:
= Drive program n is selected. Driving and parking
187