2015 MERCEDES-BENZ C-Class SEDAN driver seat adjustment

When fastening the seat belt, always make
sure that:
R the seat belt tongue is only inserted to the
belt buckle belonging to that seat.
R the seat belt is tight across your body.
Avoid wearing bulky clothing, e.g. a winter
coat.
R the seat belt is not twisted.
Only then can the forces which occur be
distributed over the area of the belt.
R the shoulder section of the belt is always
routed across the center of your shoulder.
The shoulder section of the belt must not
come into contact with your neck or be
routed under your arm. Where possible,
adjust the seat belt to the appropriate
height.
R the lap belt passes tightly and as low down
as possible across your lap.
The lap belt must always be routed across
your hip joints and not across your abdo-
men. This applies particularly to pregnant
women. If necessary, push the lap belt
down to your hip joint and pull it tight using the shoulder section of the belt.
R the seat belt is not routed across sharp,
pointed or fragile objects.
If you have such items located on or in your clothing, e.g. pens, keys or eyeglasses,
store these in a suitable place.
R only one person is using a seat belt at a
time.
Infants and children must never travel sit-
ting on the lap of a vehicle occupant. In the
event of an accident, they could be crushed
between the vehicle occupant and seat
belt.
R objects are never secured with a seat belt if
the seat belt is also being used by one of the
vehicle's occupants.
Seat belts are only intended to secure and
restrain vehicle occupants. Always observe
the "Loading guidelines" for securing objects,
luggage or loads (Y page 298). Fastening and adjusting the seat belts Please take note of the safety notes on seat
belts (Y
page 44) and the notes on their cor-
rect use (Y page 45).
If the center rear seat belt is used, observe
the information about the seat belt for the
center rear seat (Y page 47). X
Adjust the seat (Y page 108).
The seat backrest must be in an almost
upright position.
X Pull the seat belt smoothly out of belt outlet
0087 and engage belt tongue 0044in buckle 0043.
The driver's and front-passenger's seat
belts are automatically pulled taut as
required, see “Belt adjustment”
(Y page 47).
X If necessary, pull upwards on the shoulder
section of the seat belt to tighten the belt
across your body. 46
Occupant safetySafety

The shoulder section of the belt must always
run over the center of the shoulder. Adjust the
belt outlet if necessary.
X To raise: slide the belt outlet upwards.
The belt outlet engages in various posi-
tions.
X To lower: slide the belt outlet downward,
pressing belt outlet release catch 0043.
X Once the desired position has been
reached, release belt outlet release
catch 0043and ensure the belt outlet
engages in place.
All seat belts in the vehicle, except the driv-
er's seat belt, are equipped with a special seat belt retractor to secure child restraint sys-
tems properly. Further information can be
found under "Special seat belt retractor"
(Y page 60).
Seat belt for the center rear seat If the left-hand rear seat backrest is folded
down and back up again, the rear center seat
belt may lock. The seat belt can then not be
pulled out.
X To release the rear center seat belt: pull
the seat belt out approximately 1 in
(25 mm) at the belt outlet on the backrest
and then release it again.
The seat belt is retracted and released.
Releasing seat belts !
Make sure that the seat belt is fully rolled
up. Otherwise, the seat belt or belt tongue
will be trapped in the door or in the seat
mechanism. This could damage the door,
the door trim panel and the seat belt. Dam- aged seat belts can no longer fulfill their
protective function and must be replaced.
Visit a qualified specialist workshop. X
Press release button 0043, hold belt
tongue 0044firmly and guide it back towards
belt outlet 0087.
Seat belt adjustment The seat-belt adjustment is an integral part of
the PRE-SAFE ®
convenience function. This
function adjusts the driver's and front-
passenger seat belt to the upper body of the
occupants.
The belt strap is tightened slightly when:
R the belt tongue is engaged in the buckle
and
R the ignition is switched on
The seat-belt adjustment will apply a certain
tightening force if any slack is detected
between the vehicle occupant and the seat
belt. Do not hold on to the seat belt tightly
while it is adjusting.
You can switch the seat-belt adjustment on
and off using COMAND or Audio 20. Informa- tion on activating and deactivating the seat-
belt adjustment function can be found in the
Digital Operator's Manual or in the separate
COMAND or Audio 20 operating instructions. Occupant safety
47Safety Z

How the air bag system works is deter-
mined by the severity of the accident detec- ted, especially the vehicle deceleration or
acceleration and the apparent type of acci-dent:
R frontal collision
R side impact
R rollover PRE-SAFE
®
(anticipatory occupant
protection system)
Introduction PRE-SAFE
®
takes preemptive measures to
protect occupants in certain hazardous sit-
uations.
Important safety notes !
Make sure that there are no objects in the
footwell under or behind the seats when
moving the seats back. There is a risk that
the seats and/or the objects could be dam-
aged.
Despite your vehicle being equipped with the PRE-SAFE ®
system, the possibility of per-
sonal injuries occurring as a result of an acci- dent cannot be eliminated. Always adapt your
driving style to suit the prevailing road and
weather conditions and maintain a safe dis-
tance from the vehicle in front. Drive care-
fully.
Function PRE-SAFE
®
intervenes:
R in emergency braking situations, e.g. when
BAS is activated.
R in critical driving situations, e.g. when phys-
ical limits are exceeded and the vehicle
understeers or oversteers severely.
R vehicles with the Driving Assistance pack-
age: when a driver assistance system inter-
venes powerfully or the radar sensor sys- tem detects an imminent danger of colli-
sion in certain situations.
PRE-SAFE ®
takes the following measures
depending on the hazardous situation detec-
ted:
R the front seat belts are pre-tensioned.
R if the vehicle skids, the sliding sunroof and
the side windows are closed so that only a small gap remains. The panorama roof with
power tilt/sliding panel is completely
closed.
R vehicles with the memory function for the
front-passenger seat: the front-passenger
seat is adjusted if it is in an unfavorable
position.
If the hazardous situation passes without
resulting in an accident, PRE-SAFE ®
slackens
the belt pre-tensioning. All settings made by
PRE-SAFE ®
can then be reversed.
If the seat belt pre-tensioning is not reduced:
X Move the seat backrest or seat back
slightly when the vehicle is stationary.
The seat belt pre-tensioning is reduced and
the locking mechanism is released.
The seat-belt adjustment is an integral part of
the PRE-SAFE ®
convenience function. You
will find information on the convenience func-
tion under "Belt adjustment" (Y page 47). PRE-SAFE
®
PLUS (anticipatory occu-
pant protection system PLUS)
Introduction PRE-SAFE
®
PLUS is only available in vehicles
with the Driving Assistance package.
Using the radar sensor system, PRE-SAFE ®
PLUS is able to detect that a head-on or rear-
end collision is imminent. In certain hazard-
ous situations, PRE-SAFE ®
PLUS takes pre-
emptive measures to protect the vehicle
occupants. 58
Occupant safetySafety

Useful information
i This Operator's Manual describes all
models and all standard and optional equip- ment of your vehicle available at the time of
publication of the Operator's Manual.
Country-specific differences are possible.
Please note that your vehicle may not be
equipped with all features described. This
also applies to safety-related systems and
functions.
i Read the information on qualified special-
ist workshops (Y page 26). Correct driver's seat position
G
WARNING
You could lose control of your vehicle if you do the following while driving:
R adjust the driver's seat, head restraint,
steering wheel or mirrors
R fasten the seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint, steer-
ing wheel and mirror and fasten your seat belt before starting the engine. X
Observe the safety guidelines on seat
adjustment (Y page 109).
X Make sure that seat 0087is adjusted prop-
erly.
Electrical seat adjustment (Y page 110)
When adjusting the seat, make sure that:
R you are as far away from the driver's air bag
as possible
R you are sitting in a normal upright position
R you can fasten the seat belt properly
R you have moved the backrest to an almost
vertical position
R you have set the seat cushion angle so that
your thighs are gently supported
R you can depress the pedals properly.
R your legs are not fully extended
X Check whether the head restraint is adjus-
ted properly.
When doing so, make sure that you have
adjusted the head restraint so that the back
of your head is supported at eye level by the center of the head restraint.
X Observe the safety guidelines on steering
wheel adjustment (Y page 115).
X Make sure that steering wheel 0043is adjus-
ted properly.
Adjust the steering wheel manually
(Y page 115)
Adjust the steering wheel electrically
(Y page 116)
When adjusting the steering wheel, make
sure that:
R you can hold the steering wheel with your
arms slightly bent
R you can move your legs freely
R you can see all the displays in the instru-
ment cluster clearly
X Observe the safety guidelines for seat belts
(Y page 44).
X Check whether you have fastened seat
belt 0044properly (Y page 46).108
Correct driver's seat positionSeats, steering wheel and mirrors

The seat belt should:
R fit snugly across your body
R be routed across the middle of your shoul-
der
R be routed in your pelvic area across the hip
joints
X Before starting off, adjust the rear-view mir-
ror and the exterior mirrors in such a way
that you have a good view of road and traf- fic conditions (Y page 118).
X Vehicles with memory function: you can
store the seat, steering wheel, exterior mir-
ror and head-up display settings with the
memory function (Y page 121). Seats
Important safety notes
G
WARNING
Children could become trapped if they adjust the seats, particularly when unattended.
There is a risk of injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never leave children unsupervised in the vehicle.
The seats can still be adjusted when there is
no SmartKey in the ignition lock. G
WARNING
When you adjust a seat, you or other vehicle
occupants could become trapped, e.g. on the seat guide rail. There is a risk of injury.
Make sure when adjusting a seat that no one
has any body parts in the sweep of the seat.
Observe the safety notes on "Air bags"
(Y page 48) and "Children in the Vehicle"
(Y page 59). G
WARNING
If the driver's seat is not engaged, it could
move unexpectedly while the vehicle is in
motion. This could cause you to lose control of the vehicle. There is a risk of an accident. Always make sure that the driver's seat is
engaged before starting the engine.
G
WARNING
You could lose control of your vehicle if you do the following while driving:
R adjust the driver's seat, head restraint,
steering wheel or mirrors
R fasten the seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint, steer-
ing wheel and mirror and fasten your seat belt before starting the engine. G
WARNING
If you adjust the seat height carelessly, you or other vehicle occupants could be trapped andthereby injured. Children in particular could
accidentally press the electrical seat adjust-
ment buttons and become trapped. There is a
risk of injury.
While moving the seats, make sure that your
hands or other body parts do not get under the
lever assembly of the seat adjustment sys-
tem. G
WARNING
If head restraints are not installed and adjus-
ted correctly, they cannot provide protection
as intended. There is an increased risk of
injury in the head and neck area, e.g. in the
event of an accident or when braking.
Always drive with the head restraints instal-
led. Before driving off, make sure for every
vehicle occupant that the center of the head
restraint supports the back of the head at
about eye level. G
WARNING
The seat belt does not offer the intended level of protection if you have not moved the back-
rest to an almost vertical position. When brak-
ing or in the event of an accident, you could
slide underneath the seat belt and sustain
abdomen or neck injuries, for example. This Seats
109Seats, steering wheel and mirrors
Z

0044
Seat height
0087 Seat cushion length
0085 Seat cushion angle
0083 Seat fore-and-aft adjustment Adjusting the head restraints
Important safety notes G
WARNING
You could lose control of your vehicle if you do the following while driving:
R adjust the driver's seat, head restraint,
steering wheel or mirrors
R fasten the seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint, steer-
ing wheel and mirror and fasten your seat belt before starting the engine. G
WARNING
If head restraints are not installed and adjus-
ted correctly, they cannot provide protection
as intended. There is an increased risk of
injury in the head and neck area, e.g. in the
event of an accident or when braking.
Always drive with the head restraints instal-
led. Before driving off, make sure for every
vehicle occupant that the center of the head
restraint supports the back of the head at
about eye level.
General notes Pay attention to the important safety notes
(Y page 109).
Do not rotate the head restraints of the front
and rear seats. Otherwise, you cannot adjust
the height and angle of the head restraints to
the correct position. Adjusting the head restraint height
manually
X
To raise: pull the head restraint up to the
desired position.
X To lower: press release catch 0043in the
direction of the arrow and push the head
restraint down to the desired position.
Adjusting the head restraint fore-and-
aft position manually With this function you can adjust the distance
between the head restraint and the back of
the seat occupant's head.
X To move forwards: pull the head restraint
forwards in the direction of the arrow until
it engages in the desired position.
X To move backwards: press and hold
release button 0043.
X Push the head restraint back.
X Release the release button once the head
restraint is in the desired position.
X Ensure that the head restraint has engaged
properly. Seats
111Seats, steering wheel and mirrors Z

Problems with the seat ventilation
Problem
Possible causes/consequences and
0050
0050Solutions The seat ventilation has
switched off prema-
turely or cannot be
switched on. The on-board voltage is too low because too many electrical con-
sumers are switched on.
X Switch off electrical consumers that you do not need, such as
the rear window defroster or interior lighting.
Once the battery is sufficiently charged, the seat ventilation can
be switched back on. Steering wheel
Important safety notes
G
WARNING
You could lose control of your vehicle if you do the following while driving:
R adjust the driver's seat, head restraint,
steering wheel or mirrors
R fasten the seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint, steer-
ing wheel and mirror and fasten your seat belt before starting the engine. G
WARNING
Children could injure themselves if they
adjust the steering wheel. There is a risk of
injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never leave children unsupervised in the vehicle.
The electrically adjustable steering wheel can
still be adjusted when there is no key in the
ignition lock. Adjusting the steering wheel man-
ually
0043
Release lever
0044 To adjust the steering wheel height
0087 To adjust the steering wheel position
(fore-and-aft adjustment)
X Push release lever 0043down completely.
The steering column is unlocked.
X Adjust the steering wheel to the desired
position.
X Push release lever 0043up completely.
The steering column is locked.
X Check if the steering column is locked.
When doing so, try to push the steering
wheel up or down or try to move it in the
fore-and-aft direction. Steering wheel
115Seats, steering wheel and mirrors Z

Adjusting the steering wheel electri-
cally 0043
To adjust the steering wheel position
(fore-and-aft adjustment)
0044 To adjust the steering wheel height
i Further related subjects:
R EASY-ENTRY/EXIT feature
(Y page 116)
R Storing settings (Y page 121)
R Operating the on-board computer
(Y page 231). EASY-ENTRY/EXIT feature
Important safety notes G
WARNING
When the EASY-ENTRY/EXIT feature adjusts
the steering wheel, you and other vehicle
occupants – particularly children – could
become trapped. There is a risk of injury.
While the EASY-ENTRY/EXIT feature is mak-
ing adjustments, make sure that no one has
any body parts in the sweep of the steering
wheel.
Move the steering wheel adjustment lever if
there is a risk of entrapment by the steering
wheel. The adjustment process is stopped.
Press one of the memory function position
buttons. The adjustment process is stopped.
This function is only available on vehicles with
memory function. G
WARNING
If children activate the EASY-ENTRY/EXIT fea- ture, they can become trapped, particularly
when unattended. There is a risk of injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never leave children unsupervised in the vehicle. G
WARNING
If you drive off while the EASY-ENTRY/EXIT
feature is making adjustments, you could lose
control of the vehicle. There is a risk of an
accident.
Always wait until the adjustment process is
complete before driving off.
The EASY-ENTRY/EXIT feature makes getting in and out of your vehicle easier.
You can activate and deactivate the EASY-
ENTRY/EXIT feature using Audio 20/
COMAND; see the separate Audio 20/
COMAND operating instructions.
Position of the steering wheel and the
driver's seat when the EASY-ENTRY/
EXIT feature is active The steering wheel tilts upwards and the driv-
er's seat moves backwards if you:
R remove the SmartKey from the ignition lock
R with KEYLESS-GO: open the driver's door;
KEYLESS-GO must be in position 1
R with the SmartKey: open the driver's
door; the SmartKey must be in position 0or
1 in the ignition lock (Y page 157)
R open the driver's door when the ignition is
switched off
i The steering wheel only tilts upwards if
the driving position is stored after the seat or steering wheel has been adjusted
(Y page 121). 116
Steering wheelSeats
, steering wheel and mirrors