435 Controls in detail
Driving systems
Briefly press the DISTRONIC Plus lever
down past the resistance point in
direction of arrow2 (
page 430).
Release the DISTRONIC Plus lever.
The vehicle speed decreases in incre-
ments of 5 mph.Setting to last stored speed (“Resume”
function)
Briefly pull the DISTRONIC Plus lever in
the direction of arrow4 (
page 430).
DISTRONIC Plus is set to the last
stored speed.
DISTRONIC Plus resumes the last set
speed or if no speed is stored, it will set
and store the current speed.
Remove your foot from the accelerator
pedal.Deactivating DISTRONIC Plus
There are several ways to deactivate the
DISTRONIC Plus system:
Briefly tip the DISTRONIC Plus lever in
the direction of arrow3 (
page 430).
or
Step on the brake pedal.
DISTRONIC Plus will be deactivated.
The last speed set will be stored into
memory.
DISTRONIC Plus deactivates automatically
when:
the vehicle is secured with the elec-
tronic parking brake
the vehicle speed is below 20 mph and
no preceding vehicle is detected
the ESP® is in operation or switched off
with the ESP® switch (page 73)
you set the automatic transmission
toP, R, or N while driving
iThe set value is decreased in 5 mph incre-
ments each time you press the DISTRONIC Plus
lever down past the resistance point.
iThe new speed is set and the vehicle will de-
celerate. Keep in mind that it may take a brief
moment until the vehicle has reached the set
speed.
Warning!G
The speed stored in memory should only be
set again if prevailing road conditions per-
mit. Possible acceleration or deceleration
differences arising from returning to preset
speed could cause an accident and/or seri-
ous injury you and others.
iUpon switching off the engine, the last
stored speed is deleted.
iThe last stored speed is deleted when you
turn off the engine.
436 Controls in detail
Driving systems
the radar sensors are switched off
(
page 282)
the vehicle rolls backward
The segments in the multifunction display
go out, an acoustic signal sounds, and the
message “DISTRONIC PLUS Off” appears in
the multifunction display for approximately
5 seconds.
If the vehicle has been stopped by
DISTRONIC Plus and a malfunction occurs
in the system, the message “Brake immedi-
ately” will appear on the multifunction dis-
play. Step on the brake immediately to
prevent the vehicle from rolling.
DISTRONIC Plus is then switched off and
the message disappears.Setting the following distance in
DISTRONIC Plus
You can set the specified following dis-
tance for DISTRONIC Plus by varying the
time setting between 1.0 and 2.0 seconds.
Using this time setting and the current set
speed of your vehicle, DISTRONIC Plus cal-
culates and sets the required following dis-
tance to the vehicle ahead. The set
distance will be shown in the multifunction
display.
Warning!G
DISTRONIC Plus switches off and releases
the brakes when the vehicle decelerates be-
low the minimum speed of 20 mph by oper-
ation of the system unless DISTRONIC Plus
detects a vehicle directly ahead of you. At
that time the driver must apply the brakes in
order to reduce vehicle speed further or
bring it to a stop.
!Setting the automatic transmission toN
while driving cancels the DISTRONIC Plus. How-
ever, the automatic transmission should not be
set toN while driving except to coast when the
vehicle is in danger of skidding (e.g. on icy
roads).
iDepressing the accelerator pedal does not
deactivate DISTRONIC Plus. After brief accelera-
tion (e.g. for passing), DISTRONIC Plus will re-
sume the last speed set.
Warning!G
It is up to the driver to exercise discretion to
select the appropriate setting given road
conditions, traffic, driver’s preferred driving
style and applicable laws and driving recom-
mendations for safe following distance.
445 Controls in detail
Driving systems
The Parktronic system is an electronic
parking aid with ultrasonic sensors that
helps you while parking.
It visually and audibly indicates the relative
distance between the vehicle and an ob-
stacle.
The Parktronic system is automatically ac-
tivated when you switch on the ignition, re-
lease the electronic parking brake or start
the engine and engage gear D, R or N.The Parktronic system deactivates at
speeds over approximately 11 mph
(18 km/h). At lower speeds the Parktronic
system turns on again.
The Parktronic system also deactivates
when you set the automatic transmission
to P or secure the vehicle in place with the
electronic parking brake and switch off the
engine.
The Parktronic system monitors the sur-
roundings of your vehicle with six sensors
in the front bumper and four sensors in the
rear bumper.
1Sensors in the front bumper (Only visi-
ble without DISTRONIC Plus*)Range of the sensors
!The operational function of the Parktronic
system can be affected by dirty sensors, espe-
cially at times of snow and ice.
Make sure that the area on the bumpers around
the sensors is free of dirt, ice and/or slush,
otherwise Parktronic may not function properly,
see “Cleaning the Parktronic* system sensors”
(
page 589).
iInterference caused by other ultrasonic sig-
nals (e.g. working jackhammers, car wash, or the
air brakes of trucks) can cause the system to
send erratic indications, and should be taken
into consideration.
iTo function properly, the sensors must be
free of dirt, ice, snow and slush. Clean the sen-
sors regularly, being careful not to scratch or
damage the sensors, see “Cleaning the Park-
tronic* system sensors” (
page 589).
450 Controls in detail
Driving systems
Park Assist is also switched off when you
set the automatic transmission to P or
switch off the engine.
While the transmission is in neutral
positionN, Park Assist is switched off if
you secure the vehicle in place with the
electronic parking brake.
The Park Assist system monitors the sur-
roundings of your vehicle with four sensors
in the front bumper and two sensors in the
rear bumper.Range of the sensors
The sensors of the Park Assist system are
integrated in the front and rear bumpers.
Make sure that the bumpers are clear of
dirt, ice and slush in the area of the sen-
sors, as otherwise, Park Assist may not
function properly, see “Cleaning the Park
Assist* system sensors (USA only)”
(
page 590).
462 Controls in detail
Driving systems
The Night View Assist image on the multi-
function display is not impaired
by the headlamps of approaching vehi-
cles
if you cannot switch on the high beams
due to oncoming traffic
As a result, you can better follow the
course of the road and detect obstacles
earlier on.
The camera is at the top of the windshield.
1Night View Assist cameraSwitching on or off
You can only switch on the Night View As-
sist if
the SmartKey in the starter switch is
set to position2
it is dark
the light switch is set to * or B
or if the daytime driving lamps are
switched on
the automatic transmission is not in
positionR
1Night View Assist on or off
Press button1 up or down.
The Night View Assist image appears
on the multifunction display.
Image on multifunction display
When you switch on Night View Assist, the
image for the speed gauge changes on the
multifunction display. The speed gauge is
shown as a bar on the lower edge of the
multifunction display. The line for main
menus is no longer available. If you would
like to change a setting using the steering
wheel buttons, you must first switch off
Night View Assist.
iInfrared light is invisible to the human eye
and can therefore remain permanently switched
on without blinding oncoming traffic.
iThe infrared headlamps only come on above
a speed of approximately 9 mph (15 km/h).
Therefore, when you are at a standstill, you do
not have a complete view and cannot check the
function of the Night View Assist.
503 Controls in detail
Useful features
Rear window sunshade
The switches are on the rear doors.
1Opening
2Closing
You can also operate the rear window sun-
shade via COMAND (
page 249) or via
the favorite button (
page 238).
Switch on the ignition (page 344).
Press upper part 1 of the rocker
switch briefly to extend the sunshade.
Press lower part 2 of the rocker
switch briefly to retract the sunshade.
Ashtrays
Center console ashtray
1Button for disengaging ashtray
2Cover plate
iOperating the rear window sunshade from
the rear is not possible if you activate the over-
ride switch (
page 63).
iIf you operate the rear window sunshade via
COMAND or via the favorite button, this takes
precedence over the rear window sunshade but-
tons on the rear doors.
iT h e r e a r w i n d o w s u n s h a d e i s s w i t c h e d o f f a t
temperatures below -4°F (-20°C).
Warning!G
Remove ashtray only with vehicle standing
still. Engage the electronic parking brake to
secure vehicle from movement. Set auto-
matic transmission toP. With the automatic
transmission set toP, turn off the engine.
521 Controls in detail
Useful features
Step 7:
To program the remaining two signal
transmitter buttons, repeat the steps
above starting with step 3.
Rolling code programming
To train a garage door opener (or other
rolling code devices) with the rolling code
feature, follow these instructions after
completing the “Programming” portion
(steps 1 through 6) of this text. (A second
person may make the following training
procedures quicker and easier.)
Step 8:
Locate “training” button on the garage
door opener motor head unit.
Exact location and color of the button
may vary by garage door opener brand.
Depending on manufacturer, the “training” button may also be referred
to as “learn”or “smart” button. If there
is difficulty locating the transmitting
button, refer to the garage door opener
operator’s manual.
Step 9:
Press the “training” button on the ga-
rage door opener motor head unit.
The “training light” is activated.
You have 30 seconds to initiate the follow-
ing two steps.
Step 10:
Return to the vehicle and firmly press,
hold for 2 seconds and release the pro-
grammed signal transmitter button
(2, 3 or4).
Step 11:
Press, hold for 2 seconds and release
same signal transmitter button a sec-
ond time to complete the training pro-
cess.Step 12:
Confirm the garage door operation by
pressing the programmed signal trans-
mitter button (2, 3 or4).
Step 13:
To program the remaining two signal
transmitter buttons, repeat the steps
above starting with step 3.
Gate operator/Canadian programming
Canadian radio-frequency laws require
transmitter signals to “time-out” (or quit)
after several seconds of transmission
which may not be long enough for the
integrated signal transmitter to pick up the
signal during programming. Similar to this
Canadian law, some U.S. gate operators
are designed to “time-out” in the same
manner.
iIf indicator lamp1 flashes rapidly for about
2 seconds and then turns to a constant light,
continue with programming steps 8 through 12
as your garage door opener may be equipped
with the “rolling code” feature.iSome garage door openers (or other rolling
code equipped devices) may require you to
press, hold for 2 seconds and release the same
signal transmitter button a third time to com-
plete the training process.
524 Controls in detail
Useful features
Infrared reflecting windshield
Your vehicle is equipped with infrared re-
flecting glass, which reduces the amount
of radiated heat entering the vehicle interi-
or through the windows.
The infrared reflecting glass also prevents
the transmission of signals through the
glass by in-vehicle electronic devices
(e.g. electronic toll collection devices).
To allow the use of these devices in the ve-
hicle, transparent areas 1 and 3 are
placed in the windshield.
You can see them from certain angles
when ambient light condition permit.
Vehicles without Night View Assist*
1Transparent area (located left and right
to the cover of the rain light sensor)
2Cover of the rain light sensor
3Transparent area
Vehicles with Night View Assist*
1Transparent area (located left to the
cover of the rain light sensor)
2Cover of the rain light sensor
3Transparent area