2022 MERCEDES-BENZ C-CLASS SALOON Owners Manual

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

=
The "r oute based" option ( page 190) is
selected for drive program n in the
DYNAMIC SELECT menu.
= Route guidance is active.
= The state of charge of the high-voltage battery
is suPcient.
If the function is active, data on the further course
of the route is evaluated. This includes e.g. road
type, speed limitations and altitude data.
The hybrid system then adapts the operating
strategy to the further course of the route:
= Use of electrical energy and the combustion
engine are adapted.
= State of charge of the high-voltage battery is
controlled accordingly.
= Electrical energy is reserved especially for
electric mode, e.g. urban route sections.
= The vehicle automatically selects the operat-
ing mode. Function of the haptic accelerator pedal (plug-in
h
ybrid) The haptic accelerator pedal has an additional
point of r
esistance followed by increased pedal
resistance to help you drive in all-electric mode.
Characteristics of the additional point of resist-
ance:
= Available only in drive program

=
Onl y suitable for good road conditions, a dry
road surface and a clear stretch of road
C Sport = Still sporty, but with an emphasis on stability
= Enables the sporty driver to adopt a more
active driving style
= Only suitable for good road conditions, a dry
road surface and a clear stretch of road
n Hybrid (plug-in hybrid)
= Comfortable and economical driving
= Full development of all intelligent hybrid func-
tions
= Adjustable recuperation in overrun mode
= The selection of the appropriate drive type by
the hybrid system depends on the driving con-
ditions and the distance
A Comfort
= Comfortable and economical driving
= Balance between traction and stability
= Recommended for all road conditions