Asaresult, DISTRONICPLUSmay neither give
warningsnor interveneinsuchsituations.
There isariskofanaccident.
Alwayspaycarefulattentiontothe traffic
situationand be ready to brake.
GWARNING
DISTRONIC PLUScannotalwaysclearly
identify otherroad users and complex traffic
situations.
In such cases, DISTRONIC PLUS may:
Rgive an unnecessary warning and then
brake the vehicle
Rneither giveawarning nor intervene
Raccelerate unexpectedly
There isarisk of an accident.
Continue to drive carefully and be ready to
brake, in particular when warned to do so by
DISTRONIC PLUS.
GWARNING
DISTRONIC PLUS brakes your vehicle with up
to 40% of the maximum braking force. If this
braking force is insufficient,DISTRONIC PLUS
warns you visually and audibly. There isarisk
of an accident.
In such cases, apply the brakes yourself and
try to take evasive action.
!If DISTRONIC PLUS or the HOLD function
is activated, the vehicle brakes
automatically in certain situations. To
prevent damage to the vehicle, deactivate
DISTRONIC PLUS and the HOLD function in
the following or other similar situations:
Rwhen towing the vehicle
Rin the car wash
If you fail to adapt your driving style,
DISTRONIC PLUS can neither reduce the risk
of accident nor override the laws of physics.
DISTRONIC PLUS cannot take into account
the road, traffic and weather conditions.
DISTRONIC PLUS is only an aid. You are
responsible for the distance to the vehicle in
front,for vehicle speed, for braking in good
time and for staying in your lane.
Do not use DISTRONIC PLUS:
Rin road and traffic conditions which do not
allow you to maintainaconstant speed e.g.
in heavy traffic or on winding roads
Ron slippery road surfaces. Brakingor
accelerating could cause the drive wheels
to lose traction and the vehicle could then
skid
Rwhen there is poor visibility, e.g. due to fog,
heavy rain or snow
DISTRONIC PLUS may not detect narrow
vehicles driving in front,e.g. motorcycles, or
vehicles driving onadifferent line.
In particular, the detection of obstacles can
be impaired if:
Rdirt on the sensors or anything else
coveringthe sensors
Rsnow or heavy rain
Rinterference by other radar sources
Rstrongradar reflections, for example, in
parking garages
If DISTRONIC PLUS no longer detectsa
vehicle in front,DISTRONIC PLUS may
unexpectedly accelerate the vehicle to the
stored speed.
This speed may:
Rbe too high if you are driving inafilter lane
or an exit lane
Rbe so high in the right lane that you pass
vehicles driving on the left (left-handdrive
countries)
Rbe so high in the left lane that you pass
vehicles driving on the right (right-hand
drive countries)
If there isachange of drivers, advise the new
driver of the speed stored.
General notes
DISTRONIC PLUS regulates the speed and
automatically helps you maintain the
distance to the vehicle detected in front.
Vehicles are detected with the aid of the radar
178Driving systems
Driving and parking
sensor system. DISTRONIC PLUS brakes
automaticallysothat the set speed is not
exceeded.
Change intoalower gear in good time on long
and steep downhill gradients. This is
especially important if the vehicle is laden. By
doing so, you will make use of the braking
effect of the engine. This relieves the load on
the brake system and prevents the brakes
from overheating and wearing too quickly.
If DISTRONIC PLUS detects that there isarisk
ofacollision, you will be warned visually and
acoustically.DISTRONIC PLUS cannot
preventacollision without your intervention.
An intermittent warning tone will then sound
and the distance warning lamp will light up in
the instrument cluster. Brake immediately in
order to increase the distance to the vehicle
in front or take evasive action provided it is
safe to do so.
For DISTRONIC PLUS to assist you, the radar
sensor system must be operational.
If there is no vehicle in front,DISTRONIC
PLUS operates in the same way as cruise
control in the speed range between 20 mph
(Canada: 30 km/h) and 120 mph (Canada:
200 km/h). Ifavehicle is driving in front of
you, it operates in the speed range between
0mph (0 km/h) and 120 mph (Canada:
200 km/h).
Do not use DISTRONIC PLUS while driving on
roads with steep gradients.
As DISTRONIC PLUS transmits radar waves,
it can resemble the radar detectors of the
responsible authorities. You can refer to the
relevant chapter in the Operator's Manual if
questions are asked aboutthis.
iUSA only: This device has been approved
by the FCC asa"VehicularRadar System".
The radar sensor is intended for use in an
automotive radar system only. Removal,
tampering,oralteringofthedevice will void
any warranties, and is notpermitted by the
FCC. Do not tamper with, alter, or use in
any non-approved way.
Anyunauthorized modification to this
device could void the user's authorityto
operate the equipment.
iCanada only: This device complies with
RSS-210 of Industry Canada. Operation is
subject to the following two conditions:
1. This device may not cause harmful
interference, and
2. this device must accept any interference
received, including interference that may
cause undesired operation of the device.
Removal, tampering, or altering of the
device will void any warranties, and is not
permitted. Do not tamper with, alter, or use
in any non-approved way.
Anyunauthorized modification to this
device could void the user's authorityto
operate the equipment.
Cruise control lever
To storethe currentspeed orahigher
speed
To storethe currentspeed oralower
speed
$To deactivate DISTRONIC PLUS
!To storethe currentspeed or call up the
last stored speed
To set the specified minimum distance
Driving systems179
Driving and parking
Z
Activating DISTRONIC PLUS
Activation conditions
In order to activateDISTRONICPLUS, the
followingconditionsmustbefulfilled:
Rthe enginemust be started. It may take up
to two minutes after pulling away before
DISTRONIC PLUS is operational.
Rthe parkingbrake must be released.
RESP®must be active, but not intervening.
RActive ParkingAssist must not be
activated.
Rthe transmission must be in positionD.
Rthe hood must be closed.
Rthe driver's door must be closed when you
shift fromPtoDor your seat belt must be
fastened.
Rthe front-passenger door and rear doors
must be closed.
Rthe vehicle must not skid.
Activating
XBriefly pull the cruise control lever towards
you or press it up or down $.
DISTRONIC PLUS is selected.
XPress the cruise control lever repeatedly
up or down $until the desired speed
is set.
XRemove your foot from the accelerator
pedal.
Your vehicle adapts its speed to that of the
vehicle in front, but only up to the desired
stored speed.
When driving at speeds below 20 mph
(30 km/h),you can only activate DISTRONIC
PLUS if the vehicle in front has been detected
and is shown in the multifunction display.If
the vehicleinfront is no longerdetected and
displayed, DISTRONIC PLUS switches off and
atonesounds.
iIf you do not fully release the accelerator
pedal, theDISTRONIC PLUS Override
message appears in the multifunction
display. The set distancetoaslower-
movingvehicle in frontwill then not be
maintained. You will be driving at the speed
you determine by the position of the
accelerator pedal.
Activating when driving towardsa
stationary vehicle
XBriefly pull the cruise control lever towards
you !or press it up or down .
DISTRONIC PLUS is selected.
XPress the cruise control lever repeatedly
up or down until the desired speed
is set.
If the vehicle in frontofyou is stationary, you
can only activate DISTRONIC PLUS once your
vehicle is stationary as well.
iDISTRONIC PLUS can only be activated at
under 20 mph (30 km/h) ifavehicle in front
has been detected. Therefore, the
DISTRONIC PLUS distancedisplay in the
instrument cluster should be activated
(Ypage 227).
iYou can use the cruise control lever to set
the stored speed and the control on the
cruise control lever to set the specified
minimum distance(Ypage 183).
Activating at the current speed/last
stored speed
GWARNING
If you call up the stored speed and it differs
from the currentspeed, the vehicle
accelerates or decelerates. If you do not know
the stored speed, the vehicle could accelerate
180Driving systems
Driving and parking