Troubleshooting
If there is a malfunction in the proactive occupant protection system, the message Proactive
occupant protection unavailable or Proactive occupant protection: function restricted is
shown permanently on the instrument cluster display.
Go to a qualified workshop and have the system checked.
Airbag system
Introduction
This chapter contains information on the followingsubjects:
⇒ Types of front passenger front airbag system
⇒ Indicator lamp
⇒ Description and function of the airbags
⇒ Front airbags
⇒ Switching the front passenger front airbag on and off
⇒ Side airbags
⇒ Curtain airbags
⇒ Knee airbags
The vehicle is equipped with a front airbag for the driver and front passenger. The front airbags can
provide front seat occupants with additional chest and head protection if the seat, seat belts, head
restraints and, in the case of the driver, steering wheel are adjusted and used correctly. Airbags are
meant only for additional protection. The airbags are not a substitute for seat belts. Seat belts must
always be worn, even when the front seats are equipped with front airbags.
The intelligent technology of the proactive occupant protection system cannot overcome
the laws of physics, and functions only within the limits of the system. Never let the extra
convenience afforded by the proactive occupant protection system tempt you into taking
any risks when driving. The system cannot prevent a collision. The system is not a
substitute for the full concentration of the driver.
•Adapt your speed and distance from the vehicles ahead to suit visibility, weather, road
and traffic conditions.
•The system cannot detect objects in all situations.
•The proactive occupant protection system does not react to people, animals, objects
crossing in front of the vehicle, or objects which are hard to make out.
•Reflective objects such as safety barriers, tunnel entrances, heavy rain and ice can
impair the function of the proactive occupant protection system and thus prevent it
from detecting a collision risk.
•Incorrect system activation can occur.
WARNING
Accidents and injuries can occur if the driver is distracted.
•Never change settings in the Infotainment system when the vehicle is in motion.
WARNING
Failure to observe illuminated warning lamps and text messages can lead to your vehicle
breaking down in traffic, and can cause accidents and serious injuries.
•Never ignore any illuminated warning lamps or text messages.
•Stop the vehicle as soon as it is possible and safe to do so.
WARNING
Failure to observe illuminated indicator lamps and text messages can lead to your vehicle
being damaged.
NOTICE
•If the vehicle rolls over.
•If the speed in a collision is lower than the reference value specified in the control unit.
Front airbags
Fig. 44 Location and deployment zone of the driver front airbag.
Fig. 45 Location and deployment zone of the front passenger front airbag.
First read and observe the introductoryinformation and safety warnings⇒
Introduction
In conjunction with the seat belts, the front airbag system gives the front occupants additional
protection for the head and chest in the event of a severe frontal collision. Always keep as far away
from the front airbag as possible ⇒ Sitting position. This allows the front airbags to inflate fully
when triggered, thus providing maximum protection.
The front airbag for the driver is located in the steering wheel ⇒ Fig. 44 and the front airbag for the
front passenger is located in the dash panel ⇒ Fig. 45. The airbag locations are identified by the
text AIRBAG.
The areas inside the red lines are covered by the front airbags when deployed (deployment zone).
You must never leave or attach any objects in these areas ⇒. Any factory-fitted accessories will
not be struck if the driver and front passenger front airbags are deployed.
Once triggered, the airbag inflates at high speed.
•Always leave the deployment zones of the front airbags clear.
•Never attach any objects, such as drink or telephone holders, to the covers of the
airbag modules or anywhere in the airbag module deployment zone.
•No other people, animals or objects may be carried between the occupants of the front
seats and the airbag deployment zone. Ensure that children and passengers keep to
this rule.
•Do not attach any objects, e.g. mobile navigation devices, to the windscreen above the
front airbag on the front passenger side.
•Do not cover or stick anything on the steering wheel hub or the soft plastic surface of
the airbag unit in the dash panel on the front passenger side, and do not modify them
in any way.
DANGER
The front airbags are deployed in front of the steering wheel ⇒ Fig. 44 and dash panel
⇒ Fig. 45.
•When driving, always hold the steering wheel with both hands on the outside of the
ring at the 9 o'clock and 3 o'clock positions.
•Adjust the driver seat so that there is at least 25 cm between your breastbone and the
hub of the steering wheel. Contact a qualified workshop if your physical build makes
this impracticable.
•Adjust the front passenger seat so that the distance between the passenger and the
dash panel is as large as possible.
WARNING
Closing the glass roof without the roll-back function
•Press the button to the 2nd position Ⓓ until the glass roof has fully closed.
•The glass roof will now close without the roll-back function.
•Please go to a qualified workshop if the glass roof still cannot be closed.
If you let go of the switch during the closing procedure, the glass roof will open automatically.
Troubleshooting
First read and observe the introductoryinformation and safety warnings⇒
Introduction
Glass roof will not close
•The glass roof only works when the ignition is switched on. The glass roof can still be opened or
closed for a short time after the ignition has been switched off, provided the driver door or front
passenger door are not opened.
Steering wheel
Adjusting the steering wheel position
Fig. 77 Below the steering wheel in the steering column trim: lever for mechanical adjustment of the
steering wheel position.
Fig. 78 On the steering wheel: 9 o'clock and 3 o'clock position.
Adjust the steering wheel position before setting off and only when the vehicle is stationary ⇒.
•Push down the lever ⇒ Fig. 77①.
•Adjust the steering wheel so that you can hold it with both hands at its circumference at the 9
o'clock and 3 o'clock positions with your arms slightly bent ⇒ Fig. 78.
•Push the lever up firmly until it is flush with the steering column trim ⇒.
Closing the glass roof without the roll-back function can cause serious injuries.
•Always close the glass roof carefully.
•Ensure that nobody obstructs the path of the glass roof, especially if the roll-back
function is not active.
•The roll-back function does not prevent fingers or other body parts from being pressed
against the roof frame and sustaining injury.
WARNING
Seats and head restraints
Front seats
Introduction
This chapter contains information on the followingsubjects:
⇒ Mechanically adjusting the front seat
⇒ Electrically adjusting the front seat
⇒ Folding the front passenger seat backrest forwards
The following section describes the options for adjusting the front seats. Always ensure that the
correct sitting position is adjusted ⇒ Sitting position.
Incorrect use of the steering column position adjustment and incorrect adjustment of the
steering wheel can cause serious or fatal injuries.
•After adjusting the steering column, always move lever ⇒ Fig. 77① up so that it
engages securely. This prevents the steering column from moving spontaneously
while the vehicle is in motion.
•Never adjust the steering wheel when the vehicle is in motion. If you determine that a
readjustment is necessary, stop the vehicle safely and adjust the steering wheel to the
correct position.
•The steering wheel must always point towards the chest and not towards the face. This
ensures that the driver front airbag provides maximum protection in the event of an
accident.
•While driving, always keep both hands on the outside of the steering wheel at the 9
o'clock and 3 o'clock positions⇒ Fig. 78. This reduces the risk of injury if the driver
front airbag is triggered.
•Never hold the steering wheel at the 12 o'clock position, or in any other manner, e.g. on
the hub of the steering wheel. If the driver front airbag is triggered, you could receive
severe injuries to the arms, hands and head.
WARNING
Mechanically adjusting the front seat
Always adjust the front seats to their correct position before any journey and ensure that
any passenger has fastened their seat belt.
•Push the front passenger seat as far back as possible.
•Adjust the driver seat so that there is at least 25 cm between your breastbone and the
hub of the steering wheel. Adjust the driver seat by moving it forwards or backwards
so that you are able to press the pedals to the floor with your knees still slightly bent
and so that the distance from the dash panel to your knees is at least 10 cm. If your
build makes it impossible to fulfil this requirement then you must contact a qualified
workshop so they can make any necessary modifications.
•Never travel with the backrest tilted far back. The further back the backrest is tilted, the
greater the risk of injury caused by incorrect seat belt routing or an incorrect sitting
position.
•Never travel with the backrest tilted far forwards. When a front airbag is triggered it
could force the seat backrest backwards and injure vehicle occupants on the back
seats.
•Adopt and maintain the greatest possible distance from the steering wheel and dash
panel.
•You should always sit upright with your back against the seat backrest with the front
seats properly adjusted. Do not position any body part too close where the airbags are
fitted.
•The risk of serious injury is increased for passengers on the rear seat if they are not
sitting upright because the seat belts are incorrectly positioned.
WARNING
Incorrect adjustment of the seats can cause accidents and serious injuries.
•Only adjust the seats when the vehicle is stationary. The seats could change position
unexpectedly if you attempt to reposition them while the vehicle is in motion, leading
to a loss of control of the vehicle. Furthermore, an incorrect seating position is
adopted while adjusting the seat.
•Only adjust the height and tilt of the seat or move it forwards and backwards when the
area around the seat is clear.
•To be able to make adjustments to the seats, the area around them must not be
restricted by any items.
•Only adjust the height of the rear seat or move it forwards and backwards when the
area around the seat is clear.
•The areas for adjusting and locking the seats must not be soiled.
WARNING
Improper use of seat covers or protective covers may lead to the electrical seat controls
being operated accidentally and the front seats moving unexpectedly while the vehicle is
moving. You could lose control over the vehicle. This could result in serious injury and
accidents. Furthermore, this may result in damage to the electrical components in the
front seats.
•Never attach or secure seat covers or protective covers to the electrical controls.
•Do not fit seat covers or protective covers over the seats unless they have been
expressly approved for use in the vehicle.
WARNING
Cigarette lighters in the vehicle could be damaged or accidentally lit. This could lead to
serious burns and other injuries.
•Before adjusting the seats always ensure that there is no lighter on or near the
moveable parts of the seat.
•Before closing stowage areas or compartments always ensure that there is no lighter
in the way.
•Never stow lighters in stowage areas, compartments or on other surfaces in the
vehicle. High surface temperatures, especially in summer, may cause cigarette lighters
to self-ignite.
WARNING
Fig. 79 On the left front seat: controls (type 1).
Fig. 80 On the left front seat: controls (type 2).
First read and observe the introductoryinformation and safety warnings⇒
Introduction
The following section contains a description of all possible controls. The number of controls may
vary depending on the version of the seat.
The seat may have a combination of mechanical and electrical controls.
The control elements are mirrored for the front right-hand seat.
Adjusting the seat position (type 1)
Key to ⇒ Fig. 79:
Move the lever to adjust the lumbar support.
Take your weight off the backrest and turn the handwheel to adjust the backrest.
Move the lever up or down, several times if necessary, to adjust the seat height.
Pull the lever to push the front seat forwards or backwards. The front seat must engage
after the lever has been released.
Adjusting the seat position (type 2)
Key to ⇒ Fig. 80:
Take your weight off the backrest and turn the handwheel to adjust the backrest.
Move the lever up or down, several times if necessary, to adjust the seat height.
If necessary, pull or push the lever several times to adjust the angle of the seat cushion.
Raise the handle to slide the seat cushion forwards or backwards.
Pull the lever to push the front seat forwards or backwards. The front seat must engage
after the lever has been released.
Electrically adjusting the front seat
Fig. 81 Switches on the front left seat: adjusting the front seat forwards or backwards, adjusting the
backrest and the seat cushion for height and tilt.
Convenience turn signal
To operate the convenience turn signal, push the turn signal and main beam lever up or down to
the point where you meet resistance and then release the lever. The turn signal flashes 3 times.
To cancel the convenience turn signal, immediately move the lever in the opposite direction up to
the pressure point and then release it.
The convenience turn signal can be activated and deactivated in the Infotainment system in
the Vehicle settings menu ⇒ Operation and display in the Infotainment system:
The hazard warning lights also work when the ignition is switched off ⇒ In an emergency.
Some settings can be stored in the user accounts of the personalisation function and
therefore change automatically when the user account changes ⇒ Personalisation.
Vehicle lighting
Switching lights on and off
Fig. 97 Next to the steering wheel: light switch (one variant).
Switching lights on
•Switch on the ignition.
•Turn the light switch to the appropriate position.
Automatic headlights: the dipped beams are switched on or off automatically depending on
the brightness level and the weather ⇒, ⇒ Automatic headlights .The side lights
and daytime running lights are switched on. The symbol in the light switch lights up green.The
dipped beam headlights are switched on.
Switching off the lights
•Switch off the ignition.
•Turn the light switch to the appropriate position.
The lights are switched off.Leaving Home function (orientation lighting) may be switched
on ⇒ Coming Home and Leaving Home function (orientation lighting).Side lights or
continuous parking light on both sides of the vehicle switched on ⇒ Switching the parking lights on
and off. The symbol in the light switch lights up green.Dipped beam switched off – the side
lights remain on while the vehicle key is in the ignition lock and while the driver door is closed in
vehicles with Keyless Access.
Daytime running lights
The daytime running lights (dependent on equipment level) can increase the visibility of your
vehicle in traffic during the day.
The daytime running lights are switched on every time the ignition is switched on when the light
switch is in position , or (when brightness is detected).
The daytime running lights cannot be switched on or off manually.
Incorrect use of turn signals, a failure to use turn signals, or forgetting to switch off a turn
signal can confuse other road users. This can lead to accidents and serious injuries.
•Always activate the turn signal in good time when changing lanes and performing
overtaking or turning manoeuvres.
•Always switch off the turn signal once the lane change or overtaking or turning
manoeuvre has been completed.
WARNING
Switching on the Coming Home function
m/k/a999MKNot in China
•Switch off the ignition.
•Operate the headlight flasher for approximately one second.
The Coming Home lighting is switched on when the driver door is opened. The switch-off delay
starts when the last vehicle door or the boot lid has been closed.
Switching on the Coming Home function
m/k/a999MKOnly in China
•Switch off the ignition.
The Coming Home lighting is switched on when the light switch is in position and the
rain/light sensor detects that it is dark.
The switch-off delay starts when the last vehicle door or the boot lid has been closed.
Switching off the Coming home function
•Automatically after the set switch-off delay has elapsed.
•OR: automatically if a vehicle door or the boot lid is still open approximately 30 seconds after
switching on.
•OR: turn light switch to position .
•OR: switch on the ignition.
Switching on the Leaving home function
•Unlock the vehicle when the light switch is in position and the rain/light sensor detects
that it is dark.
Switching off the Leaving home function
•Automatically after the switch-off delay.
•OR: lock the vehicle.
•OR: turn light switch to position .
•OR: switch on the ignition.
Some settings can be stored in the user accounts of the personalisation function and
therefore change automatically when the user account changes ⇒ Personalisation.
Headlights
Headlight range control
Fig. 100 Next to steering wheel: headlight range control ①.
Headlight range control can be used to adjust the light cone in the dipped beam to the vehicle load
level. This gives the driver the best visibility possible and means that oncoming traffic will not be
dazzled ⇒.
Depending on the equipment in the vehicle, the headlight range can be adjusted with the control
⇒ Fig. 100 or in the Vehicle settings⇒ Operation and display in the Infotainment system
menu in the Infotainment system.
•Turn the control ⇒ Fig. 100① or the slide control in the Infotainment system to the necessary
position (example of the vehicle's load level):
Setting in the
Infotainment
system
Setting with
the control
Setting with
the control
with sports
running gear
Front seats occupied and luggage compartment
empty.
a)
a)