Page 197 of 323

Driving and operating195
On Midlevel display, the stored speedis indicated in brackets in the Driver
Information Centre when the system
is deactivated but not switched off.
On Uplevel display, the adaptive
cruise control symbol C changes
from green to white when the system
is deactivated but not switched off.
9 Warning
When adaptive cruise control is
deactivated, the driver must take
over full brake and engine control
immediately.
Switching off
Press C to switch off adaptive cruise
control. The control indicator C in the
Driver Information Centre
extinguishes. The stored speed is
deleted.
Switching off the ignition also
switches off adaptive cruise control
and deletes the stored speed.
Driver's attention ● Use adaptive cruise control carefully on bends or mountain
roads, 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 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 the
visibility. In case of sensor
blockage, clean the sensor
cover.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.
● Adaptive cruise control does ignore the oncoming traffic.
● Adaptive cruise control does not consider pedestrians and
animals for braking and driving
off.
● Adaptive cruise control considers
stopped vehicles only at low
speed.
Page 202 of 323

200Driving and operatingThe last selected setting will be storedwhen the ignition is switched off.
General information9 Warning
Forward collision alert is just a
warning system and does not
apply the brakes. When
approaching a vehicle ahead too
rapidly, it may not provide you
enough time to avoid a collision.
The driver accepts full
responsibility for the appropriate
following distance based on traffic, weather and visibility conditions.
The complete attention of the
driver is always required while
driving. The driver must always be
ready to take action and apply the
brakes.
System limitations
Forward collision alert is designed to warn on vehicles only, but may reactalso 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.● During nighttime driving.
● Weather limits visibility, such as fog, rain, or snow
● The sensor in the windscreen is blocked by snow, ice, slush, mud,dirt, windscreen damage or
affected by foreign items, e.g.
stickers.
Following distance
indication
The following distance indication
displays the distance to a preceding
moving vehicle. The front camera in
the windscreen and the Radar sensor
are used to detect the distance of a
vehicle directly ahead in the vehicle's path. It is active at speeds above
25 mph.When a preceding vehicle is detected
ahead, the distance is indicated in
seconds, displayed on a page in the
Driver Information Centre.
On Baselevel display, choose Info
Menu ? via MENU on the turn
signal lever and turn the adjuster
wheel to choose following distance
indication page, 3 112
On Mid- and Uplevel display, select
Info menu via steering wheel buttons
and press å to select following
distance indication 3 112.
The minimum indicated distance is 0.5 seconds.
Page 227 of 323

Driving and operating225Additionally, the currently valid speed
limit is displayed permanently in the
lower line of the Driver Information
Centre. In case a speed limit with add
on sign is available, a + symbol is
displayed in this area.
On Baselevel display, choose Info
Menu ? via MENU and select
traffic sign assistant page with the adjuster wheel on the turn signal lever
3 112.
On Mid- or Uplevel display, choose
Info Menu via right steering wheel
buttons and press å or ä to select
traffic sign assistant page 3 112.
When another page on the Driver Information Centre menu was
selected and then traffic sign
assistant page is chosen again, the
last recognised traffic sign will be
displayed.
Alert function
The alert function can be activated or
deactivated in the setting menu of the
traffic sign assistant page.Once activated and when the traffic
sign detection page is currently not
displayed, newly detected speed limit and no passing signs are displayed
as pop-up alerts in the Driver
Information Centre.
Page 228 of 323

226Driving and operating
On Baselevel Display, when traffic
sign assistant page is displayed,
press SET/CLR on the turn signal
lever.
Select Alerts ON or Alerts OFF by
turning the adjuster wheel and press
SET/CLR .
On Mid- or Uplevel Display, when
traffic sign assistant page is
displayed, press é on the steering
wheel controls.
Activate alerts by setting J,
deactivate alerts by setting I via
button 9.
Pop-up alert is displayed for approx.
eight seconds in the Driver
Information Centre.
System reset
The content of the traffic sign display
can be cleared in the setting menu of
the traffic sign assistant page by
selecting Reset and confirm by
pressing SET/CLR on the turn signal
lever or 9 on the steering wheel
controls.
Alternatively, SET/CLR or 9 can be
pressed for three seconds to clear the
content of the page.
Upon successful reset, a chime will
sound and the following “Default
Sign” is indicated until the next traffic
sign is detected or provided by map
data of the navigation system.
In some cases, traffic sign assistant is
cleared up automatically by the
system.
Page 322 of 323

320Turn and lane-change signals ...141
Turn signal ................................. 105
Tyre chains ................................ 266
Tyre designations ......................262
Tyre pressure ............................ 262
Tyre pressure monitoring system ............................. 109, 263
Tyre pressures ........................... 300
Tyre repair kit ............................. 267
U Ultrasonic parking assist............. 206
Upholstery .................................. 281
Uplevel display ........................... 112
Using this manual ..........................3
V
Valet mode ................................. 119
Vehicle battery ........................... 243
Vehicle checks............................ 239
Vehicle data ................................ 288
Vehicle data recording and privacy ..................................... 313
Vehicle detected ahead ..............111
Vehicle dimensions .................... 298
Vehicle Identification Number ....286
Vehicle jack ................................ 260
Vehicle messages .....................123
Vehicle personalisation .............125
Vehicle security ............................ 32
Vehicle specific data ......................3Vehicle storage ........................... 238
Vehicle tools ............................... 260
Vehicle unlocking ........................... 6 Vehicle weight ........................... 295
Ventilating ..................................... 52
W
Warning chimes .........................124
Warning lights ............................. 101
Warning triangle .......................... 82
Washer and wiper systems .........13
Washer fluid ............................... 242
Wheel changing .........................271
Wheel covers ............................. 266
Wheels and tyres .......................261
Windows ....................................... 38
Windscreen................................... 38
Windscreen wiper/washer ...........88
Winter tyres ............................... 261
Wiper blade replacement ..........244
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