128Driving and operatingThe adaptive cruise control is
deactivated automatically in the
following cases:
● The brake pedal is depressed.
● The vehicle accelerates above 112 mph (manual and automatic
transmission) or slows down
below 19 mph (manual
transmission).
● The electric parking brake is applied.
● The traction control system or electronic stability control is
deactivated or operating.
● The selector lever of automatic transmissions is neither in D nor
in M.
● A fault is detected in the electronic stability control or the
radar system.
● Immediately after the clutch pedal has been depressed or afew seconds after the clutch
pedal has been depressed
(depending on the manual
transmission).Switching off the system
Press w, the adaptive cruise control
mode is disabled and the adaptive
cruise control indication extinguishes
in the Driver Information Centre.
Pressing 5 to activate the speed
limiter deactivates adaptive cruise
control.
Switching off the ignition deletes the
stored set speed.
Driver's attention ● Use the adaptive cruise control carefully on bends or mountainroads, as it can lose the vehicle
ahead and needs time to detect it again.
● Do not use the system on slippery roads as it can create
rapid changes in tyre traction
(wheel spinning), so that you
could lose control of the vehicle.
● Do not use the adaptive cruise control during rain, snow or
heavy dirt, as the radar sensor
can be covered by a water film,
dust, ice or snow. This reduces or
suppresses completely thevisibility. In case of sensor
blockage, clean the sensor
cover.
● Do not use the system when the spare wheel is in use.
System limits9 Warning
The system's automatic brake
force does not permit hard braking and the braking level may not be
sufficient to avoid a collision.
● After a sudden lane change, the system needs a certain time to
detect the next preceding
vehicle. So if a new vehicle is
detected, the system may
accelerate instead of braking.
● The adaptive cruise control does ignore the oncoming traffic.
● The adaptive cruise control does not consider pedestrians and
animals for braking and driving
off.
132Driving and operatingOn vehicles equipped with radar
sensor and front camera, the active
emergency braking operates from
3 mph to 87 mph when a vehicle has
been detected.
Active emergency braking only works when the seat belts of the front
passengers are fastened.
The system includes: ● brake preparation system
● emergency automatic braking ● smart brake assist
● forward collision alert
● front pedestrian protection
Brake preparation system
When approaching a vehicle ahead
or a pedestrian so quickly that a
collision is likely, the brake
preparation system slightly
pressurises the brakes. This reduces
the response time, when braking is
requested.Emergency automatic braking
After activation of brake preparation
system and just before the imminent
collision, this function automatically
applies limited braking to reduce the
impact speed of the collision or
prohibit a crash.
If active emergency braking is
applied, m flashes in the instrument
cluster.
Emergency automatic braking can
only occur if a vehicle or a pedestrian
ahead is detected.
Forward collision alert 3 134
Front pedestrian protection 3 136
Below a speed of 19 mph, emergency automatic braking may slow down thevehicle to a complete stop. If the
speed exceeds 19 mph, emergency
automatic braking reduces the speed. However, the driver must apply the
brake.
Emergency automatic braking may slow the vehicle to a complete stop to
try to avoid a potential crash.● Automatic transmission: If the vehicle comes to a complete
stop, automatic braking is
maintained for up to two
seconds. Keep the brake pedal
depressed to prevent the vehicle
from starting off again.
● Manual transmission: If the vehicle comes to a complete
stop, the engine may stall.
Operation of the function may be felt
by a slight vibration in the brake
pedal.9 Warning
Emergency automatic braking is
an emergency crash preparation
feature and is not designed to
avoid crashes. Do not rely on the
system to brake the vehicle.
Emergency automatic braking will
not brake outside of its operating speed range and only responds to
detected vehicles and
pedestrians.
Driving and operating133Smart brake assist
Smart brake assist provides a boost
to braking when the brake pedal is quickly applied. The braking is based on the speed of approach and
distance to a vehicle ahead.
Minor brake pedal pulsations or pedal movement during this time is normal
and the brake pedal should continue to be applied as needed. Intelligent
brake assist will automatically
disengage only when the brake pedal is released.9 Warning
Smart brake assist may increase
vehicle braking in situations when
it may not be necessary. You
could block the flow of traffic. If this occurs, take your foot off the brakepedal and then apply the brakes
as needed.
Forward collision alert 3 134.
Front pedestrian protection 3 136.
System limitations
In some cases, the active emergencybraking system may provide an
automatic braking in situations that
seem to be unnecessary, for instance
in parking garages, due to various
types of objects, i.e., traffic signs or
vehicles in another lane. This is
normal operation, the vehicle does
not need service. Firmly apply the
accelerator pedal to override the
automatic braking if the situation and
the surroundings permit.
In the following cases, active
emergency braking performance
might be limited:
● driving on winding or hilly roads
● detecting vehicles with a trailer, tractors, muddy vehicles, etc.
● detecting a vehicle when weather
limits visibility, such as in fog,
rain, or snow
● driving during nighttime● the sensor in the windscreen or the radar unit behind the front
bumper are blocked by snow, ice,
slush, mud, dirt etc.
● the windscreen is damaged or affected by foreign objects, e.g.
stickers
the bumper is damaged or
affected by foreign objects, e.g.
license plate support
Complete attention is always required
while driving, and you should be
ready to take action and apply the
brakes and / or steer the vehicle to
avoid crashes.
We recommend to deactivate the
system in the vehicle personalisation
in the following cases:
● when towing a trailer or caravan
● when carrying long objects on roof bars or a roof rack
● when the vehicle is being towed with the engine running
● when the vehicle is fitted with snow chains
● when a spare wheel is fitted that is smaller than the other wheels
136Driving and operatingselected alert setting and vehicle
speed. Consider traffic and weather conditions when selecting the alert
timing.
Deactivation The system can only be deactivated
by deactivating the active emergency braking in the vehicle personalisation
3 76. When ignition is switched on
next time, system is activated.
System limitations
Forward collision alert is designed to
warn on vehicles, but may react also to other objects.
In the following cases, forward
collision alert may not detect a vehicle ahead or sensor performance is
limited:
● driving on winding or hilly roads
● driving during nighttime
● weather limits visibility, such as fog, rain, or snow● the sensor in the windscreen orthe radar unit behind the front
bumper are blocked by snow, ice,
slush, mud, dirt etc.
● the windscreen is damaged or affected by foreign objects, e.g.
stickers
Front pedestrian protection Front pedestrian protection may help
to avoid or reduce the harm caused
by front-end crashes with pedestrians when driving forward.The system uses the front camera in
the windscreen and depending on the vehicle configuration a radar unit inthe front bumper to detect a
pedestrian directly ahead in the path.9 Warning
The usage of a license plate
support may have an impact on
the proper operation of the radar
unit and may limit sensor
perfomance. Vehicles or
pedestrians driving or walking
ahead may not be detected by the
system.
Do not use a a license plate
support to ensure proper system
functionality.
Front pedestrian protection can
detect and alert to pedestrians in a
forward gear at speeds between
3 mph and 37 mph. Additionally, front pedestrian protection can provide a
boost to braking or automatically
brake the vehicle.
During nighttime driving, system
performance is limited.
Driving and operating1379Danger
Front pedestrian braking does not
provide an alert or automatically
brake the vehicle, unless it detects
a pedestrian.
The system may not detect
pedestrians, including children,
when the pedestrian is not directly ahead, not fully visible, not
standing upright, or when part of a
group.
The system can only be deactivated
by deactivating the active emergency braking in the vehicle personalisation
3 76. When ignition is switched on
next time, system is activated.
Front pedestrian alert When approaching a detected
pedestrian too quickly, a warning
message is displayed in the Driver
Information Centre. A warning chime
is provided.
Cruise control or adaptive cruise control may be disengaged when the
front pedestrian alert occurs.
System limitations
In the following cases, front
pedestrian protection may not detect
a pedestrian ahead or sensor
performance is limited:
● vehicle speed is out of range from
3 mph to 50 mph in forward gear
● driving on winding or hilly roads
● driving in the dark
● weather limits visibility, such as fog, rain, or snow
● the sensor in the windscreen or the radar unit behind the front
bumper are blocked by snow, ice, slush, mud, dirt etc.
● the windscreen is damaged or affected by foreign objects, e.g.
stickers
● the front bumper is damaged or affected by foreign objects, e.g.
license plate supportParking assist
General information
When attaching a trailer or bicycle
carrier to the trailer hitch, the parking
assist is deactivated.9 Warning
The driver bears full responsibility
for the parking manoeuvre.
Always check the surrounding
area when driving backwards or
forwards while using parking
assist system.
Rear parking assist
The system warns the driver with
acoustic signals and display
indication against potentially
hazardous obstacles behind the
vehicle while reverse gear is
engaged.
Driving and operating141Objects with a very small reflection
cross-section, e.g. objects of
narrow size or soft materials, may
not be detected by the system.
Parking assist systems do not
detect objects outside the
detection range.
Advanced parking assist
9 Warning
The driver bears full responsibility
for accepting the parking slot
suggested by the system and the
parking manoeuvre.
Always check the surrounding
area in all directions when using
the advanced parking assist.
The advanced parking assist
measures a suitable parking slot
while passing, calculates the
trajectory and automatically steers
the vehicle while parking.
Advanced parking assist provides
assistance for the following
manoeuvres:
● entry into a parallel parking slot
● entry into a perpendicular parking
slot
● exit from a parallel parking slot
The driver must control acceleration, braking and gear shifting, while
steering is done automatically. The driver can take control at any time by
gripping the steering wheel.
It may be necessary to move forwards and backwards more than once.
Instructions are given in the Info
Display 3 74.
Advanced parking assist can only be activated when driving forwards.
Advanced parking assist is always
combined with front-rear parking assist.
The system has six ultrasonic parking
sensors each in both the rear and
front bumper.
Entry into a parallel parking slot
Activation
Slow down the vehicle speed below
19 mph.
To search for a parking slot, activate
the system in the Info Display 3 74.
Select the parallel parking slot menu.
Select parking side by switching on
the turn light on the respective side.
The allowed parallel distance
between the vehicle and a row of
parked cars is between 0.5 m and
1.5 m.
The system will not identify slots that are clearly smaller or larger than the
vehicle.
Vehicle care191Towing
Towing the vehicle
Remove the cap.
The towing eye is stowed with the
vehicle tools 3 177.
Screw in the towing eye as far as it will
go until it stops in a horizontal
position.
Attach the tow rod to the towing eye. The towing eye must only be used for
towing and not for recovering the
vehicle.
Switch on ignition to release steering
wheel lock and to permit operation of
brake lights, horn and windscreen
wiper.
Caution
Deactivate the driver assistance
systems like active emergency
braking 3 131, otherwise the
vehicle may automatically brake during towing.
Switch the selector lever to neutral.
Release the parking brake.
Caution
Drive slowly. Do not drive jerkily.
Excessive tractive force can
damage the vehicle.
When the engine is not running,
considerably more force is needed to
brake and steer.
To prevent the entry of exhaust gases from the towing vehicle, switch on the
air recirculation and close the
windows.
220IndexAAccessories and vehicle modifications .......................... 160
Active emergency braking ....72, 131
Adaptive cruise control ..............123
AdBlue .................................. 70, 106
Adjustable air vents .....................95
Advanced parking assist ............141
Airbag and belt tensioners ...........66
Airbag deactivation ................38, 66
Airbag label................................... 33 Airbag system .............................. 33
Air conditioning regular operation 96
Air conditioning system ................ 89
Air intake ...................................... 96
Air vents........................................ 95
Antilock brake system ................ 114
Antilock brake system (ABS) .......68
Anti-theft alarm system ................18
Anti-theft locking system .............. 17
Appearance care ........................193
Armrest ......................................... 30
Ashtrays ....................................... 60 Automatic anti-dazzle ..................22
Automatic crash notification (ACN) 77
Automatic light control .................80
Automatic locking ........................15
Automatic operation of electric parking brake off .......................68
Automatic transmission .............109Autostop............................... 71, 102
Auxiliary heater ............................. 95
B Battery discharge protection ........87
BlueInjection ............................... 106
Bonnet ....................................... 162
Brake and clutch fluid .................199
Brake and clutch system .............67
Brake assist ............................... 117
Brake fluid .................................. 165
Brakes ........................................ 165
Breakdown.................................. 191
Bulb replacement ....................... 169
C Capacities .................................. 208
Catalytic converter .....................106
Central locking system ................11
Centre console storage ...............47
Changing tyre and wheel size ...180
Charging system .......................... 66
Child locks ................................... 16
Child restraint installation locations ................................... 43
Child restraints.............................. 40
Child restraint systems ................40
Cigarette lighter ........................... 60
Climate control systems ...............88
Clock............................................. 58
Control indicators.......................... 65