MERCEDES-BENZ C-CLASS ESTATE 2021 Workshop Manual

*NOTE Damage caused by objects in the
footwell or behind the seat
The automatic adjustment of the seat position
may result in damage to the seat and/or the object.
Stow objects in a suitable place.
Reversing the PRE-SAFE n
system measures
If an accident did not occur, the pre-emptive
measures that were taken are reversed.
You will need to perform certain settings yourself.
If the seat belt pre-tensioning is not reduced,
move the seat backrest back slightly.
The locking mechanism releases.
Function of PRE-SAFE n
PLUS (anticipatory occu-
pant protection plus)
PRE-SAFE n
PLUS can detect certain impacts, par-
ticularly an imminent rear impact, and take pre-
emptive measures to protect the vehicle occu-
pants. These measures cannot necessarily pre-
vent an imminent impact.
PRE-SAFE n
PLUS can implement the following
measures independently of each other:
= Tightening the seat belts on the driver's seat
and front passenger seat.
= Activating the rear hazard warning lights at a
higher Oashing frequency.
= Increasing brake pressure when the vehicle is
stationary. This brake application is cancelled
automatically when the vehicle pulls away.
If an accident did not occur, the pre-emptive
measures that were taken are reversed.
System limits
The system will not initiate any action in the fol- lowing situations:
= when reversing
or
= when the vehicle is towing a trailer and there
is a risk of a rear impactThe system will not initiate any braking application
in the following situations:
= whilst driving
or
= when entering or exiting a parking space while
using Active Parking Assist
Function of PRE-SAFE n
Impulse Side
If an imminent side impact is detected, PRE-
SAFE n
Impulse Side can pre-emptively move the
front seat vehicle occupant's upper body towards the centre of the vehicle. It does this by rapidly
inOating an air cushion in the outer seat side bol-
ster of the seat backrest on the side on which the impact is anticipated. This increases the distance
between the door and the vehicle occupant.
If PRE-SAFE n
Impulse Side has been deployed or
is faulty, the PRE-SAFE impulse side inoperative
See Owner's Manual display message appears
(  page 464).
Occupant safety49

Automatic measures aser an accident
Depending on the type and severity of the acci-
dent, and depending on the vehicle's equipment, the following measures can be implemented, forexample:
= automatic braking (post-collision brake)
= activating the hazard warning lights
= triggering an automatic emergency call
(  page 304)
= switching oM the engine
To restart the vehicle, switch the ignition oM
and switch it back on (  page 160). Depend-
ing on the type and severity of the accident, it
is possible that the vehicle can no longer be
started.
= switching oM the fuel supply
= unlocking the vehicle doors
= lowering the side windows
= displaying the emergency guide in the central
display
= switching on the interior lightingFunction of the post-collision brake
Depending on the accident situation, the post-col-
lision brake can minimise the severity of a further
collision or even avoid it.
If an accident is detected, the post-collision brake
can implement automatic braking. When the vehi-
cle has come to a standstill, the electric parking
brake is automatically applied.
The driver can cancel automatic braking by taking
the following actions:
= braking more strongly than automatic braking
= fully depressing the accelerator pedal with
force
Safely transporting children in the vehicle
Always observe when children are travelling in the vehicle
%Also strictly observe the safety notes for the
speciNc situation. In this way you can recog-
nise potential risks and avoid dangers if chil- dren are travelling in the vehicle
(  page 51).Be diligent
Bear in mind that negligence when securing a
child in the child restraint system may have seri-
ous consequences. Always be diligent in securing
a child carefully before every journey.
To improve protection for children younger than 12 years old or under 1.50 m in height,
Mercedes-Benz recommends you observe the fol- lowing information:
= Always secure the child in a child restraint sys-
tem suitable for this Mercedes-Benz vehicle.
= The child restraint system must be appropriate
to the age, weight and size of the child.
= The vehicle seat must be suitable for Ntting a
child restraint system (  page 55).
Accident statistics show that children secured on
the rear seats are generally safer than children secured on the front seats. For this reason,
Mercedes-Benz strongly advises that you Nt a
child restraint system to a rear seat.50Occupant safety

The generic term child restraint systemThe generic term child restraint system is used in this Owner's Manual. A child restraint system is,for example:
= a baby car seat
= a rearward-facing child seat
= a forward-facing child seat
= a child booster seat with a backrest and seat
belt guide
Mercedes-Benz recommends using a child
booster seat with a backrest.
The child restraint system must be appropriate to
the age, weight and size of the child.
Observe laws and legal requirements
Always observe the legal requirements when
using a child restraint system in the vehicle.
Make sure that the child restraint system is approved in accordance with the valid test speciN-
cations and guidelines. Further information can
be obtained at a qualiNed specialist workshop.
Mercedes-Benz recommends that you use a Mercedes-Benz Service Centre for this purpose.Only use approved child restraint systems
Only child restraint systems that meet the follow-ing UNECE standards are permitted for use in the
vehicle:
= UN-R44
= UN-R129 (i-Size child restraint systems)
Information on child restraint system approval categories and details on the approval label on
the child restraint system (  page 55).
Detecting risks, avoiding danger
Securing systems for child restraint systems in
the vehicle
Only use the following securing systems for child
restraint systems:
= the ISOFIX or i-Size securing rings
= the vehicle's seat belt system
= the Top Tether anchorages
Fitting an ISOFIX or an i-Size child restraint sys-
tem is preferred.
Simply attaching to the securing rings on the vehi- cle can reduce the risk of Ntting the child restraint
system incorrectly.
When securing a child with the integrated seat belt of the ISOFIX or i-Size child restraint system,
always comply with the permissible gross weight for the child and child restraint system
(  page 59).
Advantage of a rearward-facing child restraint sys-
tem
It is preferable to transport a baby or a small child
in a suitable rearward-facing child restraint sys- tem. In this case, the child sits in the opposite
direction to the direction of travel and faces back- wards.
Babies and small children have comparatively
weak neck muscles in relation to the size and
weight of their head. The risk of injury to the cer-
vical spine during an accident can be reduced in a
rearward-facing child restraint system.Occupant safety51

Always secure a child restraint system correctly&WARNING Risk of injury or death due to
incorrect installation of the child restraint
system
The child can then not be protected or
restrained as intended.
Be sure to comply with the manufactur-
er's installation instructions for the child
restraint system and its correct use.Make sure that the entire base of the child restraint system always rests on
the sitting surface of the seat.Never place objects (e.g. cushions)
under or behind the child restraint sys- tem.Use child restraint systems only with the
original cover designed for them.Always replace damaged covers with
genuine covers.&WARNING Risk of injury or death due to
unsecured child restraint systems in the
vehicle
If the child restraint system is incorrectly Ntted
or not secured, it can come loose.
The child restraint system could be Oung
around and hit vehicle occupants.
Always install child restraint systems cor- rectly, even when not in use.Always comply with the child restraint
system manufacturer's installation
instructions.
= Always observe the child restraint system
manufacturer's installation and operating
instructions as well as the vehicle-speciNc
information:
- Fitting the ISOFIX or i-Size child restraint
system to the rear seat (  page 59).
- Securing the child restraint system with
the seat belt on the rear seat
(  page 63).
-
Securing the child restraint system with
the seat belt on the front passenger seat
(  page 66). Observe the speciNc
instructions for the rearward-facing and forward-facing child restraint systems (  page 65).
If the front passenger seat is occupied, ensure, both before and during the jour-ney, that the status of the front passenger airbag is correct for the current situation
(  page 46).
= Observe the warning labels in the vehicle inte-
rior and on the child restraint system.
= Also secure Top Tether if present.
Do not modify the child restraint system&WARNING Risk of injury due to modiNca-
tions to the child restraint system
The child restraint system can no longer func-
tion properly. This poses an increased risk of
injury.
Never modify a child restraint system.52Occupant safety

Only aPx accessories which have been
specially approved for this child restraint
system by the child restraint system's manufacturer.
Mercedes!äBenz recommends Mercedes-Benzcare products for cleaning child restraint systemsrecommended by Mercedes-Benz.
Only use child restraint systems which are in
proper working condition
&WARNING Risk of injury or death caused
by the use of damaged child restraint sys- tems
Child restraint systems or their retaining sys-tems that have been subjected to stress in an
accident may not be able to perform their
intended protective function.
It may be the case that the child cannot be
properly restrained.
Always immediately replace child restraint systems that have been dam-
aged or involved in an accident.Have the securing systems for the child restraint systems checked at a qualiNed
specialist workshop before installing a
child restraint system again.
Avoid direct sunlight
&WARNING Risk of burns when the child
seat is exposed to direct sunlight
If the child restraint system is exposed to
direct sunlight or heat, parts could heat up.
Children could suMer burns from these parts,
particularly on metallic parts of the child restraint system.
Always make sure that the child restraint
system is not exposed to direct sunlight.Protect the child restraint system with a
blanket, for example.If the child restraint system has been
exposed to direct sunlight, allow it to
cool before securing a child into it.Never leave children unattended in the vehicle.Observe when stopping or parking&WARNING Risk of accident and injury due
to leaving children unattended in the vehi-
cle
If children are les unattended in the vehicle,
they could, in particular:
= open doors, thereby endangering other
persons or road users.
= get out and be struck by oncoming traPc.
= operate vehicle equipment and become
trapped, for example.
In addition, the children could also set the
vehicle in motion by, for example:
= releasing the parking brake.
= changing the transmission position.
= starting the vehicle.
Never leave children unattended in the
vehicle.When leaving the vehicle, always take the key with you and lock the vehicle.Occupant safety53

Keep the vehicle key out of the reach of
children.&WARNING Danger to life due to exposure
to extreme heat or cold in the vehicle
If people, particularly children, are exposed to
extreme temperatures over an extended
period of time, there is a risk of serious injury
or danger to life.
Never leave persons, children in particu-
lar, unattended in the vehicle.
Overview of recommended child restraint systems
%Further information on the correct child
restraint system can be obtained at a quali-
Ned specialist workshop. Mercedes-Benz rec-
ommends that you use a Mercedes-Benz Service Centre for this purpose.Securing with ISOFIX
Weight category 0+ (up to 13 kg and up to
approx. 15 months)Type 1BABY SAFE plusSize categoryEApprovalE1 04 301 146Order number 2B6 6 86 82241 Manufacturer: Britax R

Weight category II/III (15 to 36 kg and fromapproximately 3 to 12 years)Type 1KIDFIX XPApprovalE1 04 301 304Order number 2A 000 970 49 02Type1AMG KIDFIX XPApprovalE1 04 301 304Order number 2A 000 970 33 021 Manufacturer: Britax R

Approval categories in accordance with UN-R44Example of an approval label
=Universal: child restraint systems in the "Uni-
versal" category are approved for installation
in vehicles. They can be used, in accordance
with overviews of the suitability of seats for
securing child restraint systems, on seats labelled U, UF or IUF.
The identiNcation IUF refers to ISOFIX child
restraint systems in the "Universal" category.
These child restraint systems must also be secured using Top Tether or support points.
= Semi-Universal: child restraint systems in the
"Semi-Universal" category may only be used if
the vehicle and vehicle seat are listed in the child restraint system manufacturer's vehicle
model list.
= Vehicle-speciNc child restraint systems in the
vehicle-speciNc category may only be used if
the vehicle and vehicle seat are listed in the child restraint system manufacturer's vehicle
model list.Approval categories in accordance with UN-R129Example of an approval label
= i!äSize: child restraint systems in the "i!äSize"
category are approved for installation in vehi-
cles with i!äSize mounting brackets. They can be used, in accordance with overviews of the suitability of seats for securing child restraint
systems, on seats labelled i!äU.
56Occupant safety

The identiNcation i!äU refers to i!äSize child
restraint systems in the "Universal" category.
These child restraint systems must also be
secured using Top Tether or support points.
Observe the suitability of vehicle seats
Depending on the approval category, there are
forward-facing and rearward-facing child restraint systems. Their use can be restricted for certain
vehicle seats:
= Suitability of seats for attaching ISOFIX child
restraint systems (  page 57)
= Suitability of seats for securing i!äSize child
restraint systems (  page 58).
= Suitability of seats for attaching belt-secured
child restraint systems (  page 62)Fitting an ISOFIX or i-Size child restraint system
on the rear seat

q Overview of suitability of the seats for attaching
ISOFIX child restraint systems
ISOFIX is a standardised securing system for spe-
cially designed child restraint systems.
®The symbol indicates seats suitable for
attaching an ISOFIX child restraint system in accordance with UN R44 (  page 55).
Attach only child restraint systems that are approved in accordance with UN R44 as per the following ISOFIX tables.
Carry cot
Size class !

Size class !