
The parking procedure was ended because TCS was deactivated during the park-
ing procedure.
Trailer: Park Assist stopped.
The parking procedure cannot be carried out because a trailer is hitched. Time limit exceeded. Take over steering!
The parking procedure was ended because the time limit of 6 minutes was passed.
Park Assist currently not available.
The system cannot be activated because a fault exists on the vehicle. Seek help
from a specialist garage.
Park Assist stopped. Not available.
The parking procedure was ended because a fault exists on the vehicle. Seek help
from a specialist garage.
Park Assist faulty. Workshop!
The parking procedure is not possible because a fault exists in the system. Seek help from a specialist garage.
ASR intervention. Take over steering!
The parking procedure is terminated by a TCS intervention. Park Assist: indicate and engage reverse
The prerequisites for manoeuvring out of a parking space using the system have
been met. Switch on the turn signals and shift into reverse.
Aut. parking space exit not possible. Space too small.
The manoeuvring procedure using the system is not possible. The parking gap is too small.
Braking intervention. Speed too high.
The driving speed during the parking procedure was too high - automatic brake
assist is initiated.Cruise Control System
Introduction
This chapter contains information on the following subjects:
Activating/deactivating
147
Storing and maintaining speed
147
Changing the stored speed
147
Switching off temporarily
147
Information on the display
148
The Cruise Control System (CCS) maintains a set speed, more than 25 km/h, with-
out you having to actuate the accelerator pedal.
This is only possible within the range which is permitted by the power output and
braking power of the engine.
The warning light
illuminates in the instrument cluster when the cruise control
system is switched on.
WARNING■ For safety reasons, the cruise control system must not be used in dense
traffic or on unfavourable road surfaces (such as icy roads, slippery roads,
loose gravel) – risk of accident!■
The saved speed may only be resumed if it is not too high for the current
traffic conditions.
■
Always deactivate the cruise control system after use to prevent uninten-
tional switching on of the system.
CAUTION
■ The cruise control system is not able to maintain a constant speed when driving
in areas with very steep gradients. The weight of the vehicle increases the speed
at which it travels. In such cases, a lower gear should be engaged or the foot-
brake applied.■
It is not possible to switch on the cruise control system if the first gear or re-
verse gear is engaged (Vehicles fitted with a manual transmission)
■
The cruise control system cannot be activated when the selector lever is in po-
sitions P, N or R (vehicles with automatic transmission).
146Driving

Briefly push the rocker button B into the RES/+ position in order to resume the
stored speed after the clutch or brake pedal is released.
Information on the display
Fig. 134
Instrument cluster display: Examples of status displays the CCS
First read and observe the introductory information and safety warn- ings
on page 146.
Explanation of graphic
The GRA is temporarily switched off.
System fault. Seek help from a specialist garage.
The speed memory is blank. The GRA is switched on.
Adaptive Cruise Control (ACC)
Introduction
This chapter contains information on the following subjects:
Instructions and Information
148
Radar sensor
149
Operation
150
Automatic stop-start
151
Operation Overview
151
Start control
152ABCDStop/resume control152Set/change the desired speed152
Set time interval level
153
Special driving conditions
153
Information messages
154
Adaptive cruise control (From here on referred to only as ACC) can maintain the
set speed or the proximity to the vehicle ahead consistently, without the need to
operate the gas or brake pedals.
The state in which the ACC maintains the speed or the proximity is described as
control from here on.
WARNING■
The ACC only works as an aid - it does not absolve the driver of the respon-
sibility to maintain full control over the vehicle's steering.■
Always adapt your speed and safety proximity to the vehicle ahead to the
current visibility, weather, road and traffic conditions.
■
The driver must always be ready to take over steering of the vehicle himself
(accelerate or brake).
Note
■ The ACC is designed primarily for use on motorways.■Some ACC notifications in the display of the instrument cluster may be hidden
by notifications for other functions. An ACC notification automatically appears for
a brief moment when there is a change in status of the ACC.
Instructions and Information
First read and observe the introductory information and safety warn-ings
on page 148.
WARNING■ The ACC does not react when approaching a stationary obstacle, such as
traffic jams, vehicle breakdowns or vehicles waiting at a traffic light.■
The ACC does not respond to crossing or oncoming objects. 148Driving

WARNING (Continued)■If the ACC does not decelerate fast enough, immediately apply the vehicle's
footbrake.■
Control may only be resumed if the stored speed is not too high for the cur-
rent traffic conditions.
WARNINGFor safety reasons, do not use the ACC under the following conditions.■When driving in turning lanes, motorway exits or construction sites, to avoid
an unwanted acceleration to the stored speed.■
When visibility is poor, (e.g. fog, heavy rain, thick snowfall).
■
When road conditions are poor (e.g. ice, slippery road, gravel, dirt road).
■
When driving around “sharp” bends.
■
When riding on a steep gradient / high slope.
CAUTION
■ It is not possible to switch on the control on vehicles fitted with a manual
transmission if the first gear or reverse gear is engaged.■
It is not possible to switch on the control on vehicles fitted with an automatic
transmission , if the selector lever is in the position P, N or R .
■
The control may automatically switch off when some brake assist systems (e.g.
ESC) intervene, when the maximum permissible engine speed is exceeded, etc.
Note
■ The speed can only be set and stored when ACC is activated. The stored speed
may differ from the actual speed if a proximity control procedure is in progress at the time.■
Vehicles with an automatic transmission can decelerate to a standstill and start
again using the ACC.
■
The ACC reduces the speed by automatically releasing the accelerator or by
means of a braking procedure as appropriate. If the brakes are used for an auto-
matic speed reduction at any moments, then the brake light illuminates.
■
In case of failure of more than one brake light on the vehicle or on the electri-
cally connected trailer, the ACC becomes unavailable.
Radar sensorFig. 135
Mounting location of the radar
sensor
First read and observe the introductory information and safety warn-
ings on page 148.
The radar sensor » Fig. 135 (From here on referred to as sensor) is used to assess
the traffic situation in front of the vehicle.
The sensor can distinguish objects by radiating and receiving electromagneticwaves.
The sensor function may be impaired in the events of one of the following.
› The sensor is covered by mud, snow or debris, for example.
› The sensor or its immediate surroundings are covered by other objects, for ex-
ample, a sticker is attached.
› When visibility is poor, (e.g. fog, heavy rain, thick snowfall).
If the sensor is dirty or does not have “visibility” for any other reason, the follow- ing message appears in the instrument cluster display.
ACC: no sensor view!
Stop the car, switch off the engine and clean the sensor or eliminate the obstacle
causing the lack of“visibility”. Should the ACC still be unavailable after the engine is restarted,
» Fig. 138 on page 151 push the lever into position. Seek help
from a specialist garage.
149Assist systems

Start controlFirst read and observe the introductory information and safety warn-
ings
on page 148.
Basic requirements for start of control
ACC is enabled.
TCS is enabled » page 137, Brake assist systems .
On vehicles with a manual transmission, the second gear or higher must be
engaged.
On vehicles with a manual transmission, the current speed must be higher
than approx. 25 km/h.
On vehicles with an automatic transmission, the selector lever must be in the
D/S position or in the Tiptronic position.
On vehicles with an automatic transmission, the current speed must be high-
er than approx. 2 km/h.
The control be started with the key
or by adjusting the lever into the sprung
position
» Fig. 138 on page 151 .
Button
›
Press
the key.
The ACC will take over the current speed and executes control.
Lever position
›
Set the lever into the sprung position
.
The ACC will take over the current speed and executes control. Should the speed be stored already, the ACC adopts this speed and executes control.
If control is enabled, the green indicator light
illuminates in the warning light
bar.
Note
■ If control is started at a speed of less than 30 km/h on vehicles with an auto-
matic transmission, the speed of 30 km/h is stored. The speed increases auto-
matically to 30 km/h or is regulated with respect to the speed of the vehicle ahead.■
When TCS is disabled, it will be activated automatically upon starting control.
■
If the TCS is deactivated during control, control is stopped automatically.
Stop/resume control
First read and observe the introductory information and safety warn-ings
on page 148.
Stop control
›
Set the lever into the sprung position » Fig. 138 on page 151 .
or
›
Apply the brake.
Control stops, the speed remains stored.
Resume control
›
Start control » page 152.
Note
Control is also stopped when the clutch is held down for longer than 30 s.
Set/change the desired speed
First read and observe the introductory information and safety warn-
ings
on page 148.
The desired speed can be set or changed using the control lever » page 151.
The set speed is stored upon releasing the lever or the button on the button on
the lever.
Set/change speed by 10 km/h at a time
) - Requirements
ACC is enabled.
Increase speed by 1 km/h at a time (
) - Requirements
ACC is enabled.
Vehicle control ensues.
Decrease speed by 1 km/h at a time (
) - Requirements
ACC is enabled.
Vehicle control ensues.
152Driving

The area monitoring system (From here on only referred to as Front Assist) warns
you of the danger of a collision with an obstacle in front of the vehicle and tries to
avoid a collision or mitigate its consequences by automatically applying the
brakes as appropriate.WARNING■ Front Assist only works as an aid, it does absolve the driver of the responsi-
bility to maintain full control over the vehicle's steering.■
Front Assist has physical and system related limitations. For this reason, the
driver may experience some undesired or delayed system responses in certain
situations. You should therefore always be alert and ready to intervene!
■
Always adapt your speed and safety proximity to the vehicle ahead to the
current visibility, weather, road and traffic conditions.
■
If Front Assist gives a warning, then, depending on the traffic situation, im-
mediately slow down the car by applying the brakes or avoid the obstacle.
■
The increased safety through the Front Assist system must not tempt you
to take greater risks than otherwise – risk of accident!
■
The driver must always be ready to take over steering of the vehicle himself
(brake or accelerate).
■
Front Assist does not respond to crossing or oncoming objects.
Instructions and Information
First read and observe the introductory information and safety warn-ings
on page 154.
Front Assist may become impaired in the following situations, for example.
› When visibility is poor, (e.g. fog, heavy rain, thick snowfall).
› Driving around “sharp” bends.
› When fully pressing down the accelerator pedal.
› If there is a fault with the Front Assist system.
› When one of the brake assist systems (e.g. ESC) intervenes.
WARNINGIn the following situations, Front Assist should be switched off for safety rea-
sons.■
When the vehicle is being towed away.WARNING (Continued)■ When the vehicle is on a rolling test bench.■When an undesired activation has repeatedly occurred.■
When on a truck, train or a car ferry service or the like.
CAUTION
Narrow vehicles or vehicles travelling side by side are not detected by Front As-
sist via the radar sensor until they are within the sensor's range. This is especially
true for narrow vehicles, such as motorcycles.
Note
In case of failure of more than one brake light on the vehicle or on the electrically
connected trailer, Front Assist not available.
Radar sensor
Fig. 141
Mounting location of the radar
sensor
First read and observe the introductory information and safety warn- ings on page 154.
The radar sensor » Fig. 141 (From here on referred to as sensor) is used to assess
the traffic situation in front of the vehicle.
The sensor can distinguish objects by radiating and receiving electromagneticwaves.
155Assist systems

The sensor function may be impaired in the events of one of the following.
› The sensor is covered by mud, snow or debris, for example.
› The sensor or its immediate surroundings are covered by other objects, for ex-
ample, a sticker is attached.
› When visibility is poor, (e.g. fog, heavy rain, thick snowfall).
If the sensor is dirty or does not have “visibility” for any other reason, the follow-
ing message appears in the instrument cluster display.
Front Assist: no sensor view.
Stop the car, switch off the engine and clean the sensor or eliminate the obstacle
causing the lack of“visibility”. Should Front Assist still be unavailable after the en-
gine is restarted, consult a specialist garage for help.WARNING■ If you suspect that the sensor is damaged, deactivate Front Assist. Have the
sensor checked by a specialist garage.■
The sensor can become misaligned by collisions or by damage to the front of
the vehicle, the wheel arch or the underside of the vehicle. This can lead to
impaired function of the Front Assist function - risk of accidents! If this is the
case, have the sensor checked by a specialist garage.
■
Any improperly carried out work to the front of the vehicle may cause the
sensor to become misaligned. We therefore recommend only having these
modifications and technical alterations carried out by a specialist garage. Please also observed the instructions in » page 200, Service work, adjust-
ments and technical alterations .
■
The area in front of and around the sensor must not be covered with stick-
ers, additional lights or similar items. This can lead to impaired function of the
sensor - risk of accidents!
WARNINGThe sensor may not be able to distinguish all objects correctly under certain
circumstances. You should therefore not use Front Assist in the following ca-
ses - risk of accidents!■
When driving through places where metal objects (such as metal buildings,
railroad tracks, etc.) can be found.
■
When driving through very divided and enclosed spaces (such as large-ca-
pacity garages, car ferries and the like.)
CAUTIONRemove the snow with a brush and the ice with a solvent-free de-icer.
Operation
Fig. 142
Instrument cluster display: Note
(dangerous proximity) / advance
warning or intervention of the
city emergency braking function
First read and observe the introductory information and safety warn-
ings on page 154.
Front Assist assists the driver while driving in the following ways:
› Alerts you about a dangerous proximity to the vehicle ahead.
› Warns you of an impending collision.
› Prepares the brakes for emergency braking prior to a detected danger.
› Assists with a brake action triggered by the driver.
› If the driver fails to respond to a detected danger, an automatic brake action is
performed.
Front Assist can work only if the following basic conditions are met. Front Assist is enabled.
TCS is enabled » page 137, Brake assist systems .
The vehicle is traveling forwards at a speed of more than approx. 5 km/h.
proximity warning (dangerous proximity)
If a safe time interval to the vehicle ahead is exceeded, the display of the instru- ment cluster shows the symbol » Fig. 142 -
.
Immediately increase the proximity if the current traffic situation allows you to do so!
The proximity at which the warning is displayed depends on the current speed.
The warning may occur when driving between about 60 km/h and 210 km/h.
156Driving

The emergency brake function is automatically activated or deactivated togetherwith the Front Assist system.
If the emergency brake function triggers an automatic brake action, the display of
the instrument cluster shows the symbol » Fig. 142 on page 156 - .WARNINGThe emergency brake function can slow down the vehicle to a complete
standstill. If the vehicle continues to roll forward after stopping, then it should
be stopped with the footbrake.
CAUTION
Automatic braking interventions by the emergency brake function can be termi-
nated by pressing the clutch or the accelerator, or by moving the steering wheel.
Note
If an automatic brake intervention is triggered by the emergency brake function,
the pressure in the brake system increases and the brake pedal cannot be oper-
ated with the normal pedal stroke.
Information messages
First read and observe the introductory information and safety warn-
ings
on page 154.
The messages and information are indicated in the instrument cluster display.
Front Assist: no sensor view.
The sensor is dirty or has no “visibility”. Stop the car, switch off the engine and clean the sensor or remove the obstacle causing the lack of “visibility” » Fig. 135
on page 149 . If the message appears again after starting the engine, the system
should be disabled » page 157. Seek help from a specialist garage.
Front Assist not available.
Stop the vehicle, switch off the engine and then start it again. If the message ap-
pears again after starting the engine, the system should be disabled » page 157.
Seek help from a specialist garage.
START-STOP
Introduction
This chapter contains information on the following subjects:
Starting/shutting down the engine
159
Operating conditions of the system
160
Manually activating/deactivating the system
160
Information messages
161
The START-STOP system helps you to save fuel while at the same time reducing
harmful exhaust emissions and CO 2 emissions.
The function is automatically activated each time the ignition is switched on.
In the start-stop mode, the engine automatically switches to the vehicle's idle phase, e.g. when stopped at traffic lights. The engine restarts automatically
where necessary.
Information about the current status of the system can be displayed in the Info-
tainment display » operating instructions for Infotainment , chapter Vehicle set-
tings (CAR button) .
The system can work only if the following basic conditions are met. The driver's door is closed.
The driver has fastened the seat belt. The bonnet is closed.
The driving speed was higher than 4 km.h after the last stop.
No trailer is coupled.
WARNING■ The brake servo unit and power steering only operate if the engine is run-
ning.■
Never let the vehicle roll with the engine switched off.
CAUTION
Always deactivate the START-STOPsystem before driving through wa-
ter » page 135 . 158Driving

Note■If the driver's seat belt is removed for more than approx. 30 seconds or the driv-
er's door is opened during stop mode on vehicles with manual transmission or au- tomatic transmission (when the selector lever in position P), the engine must be
started manually » page 121.■
After manually starting the engine on vehicles with manual transmission, auto-
matic engine shut down is not possible until the vehicle has travelled the re-
quired minimum distance for START-STOPP mode.
■
If on vehicles with automatic transmission, the selector lever D/S or N is selec-
ted after moving in reverse, the vehicle will first need to achieve a speed greater
than 10 km/h before automatic engine shut down takes place again.
■
Changes to the outdoor temperature can have an effect on the internal temper-
ature of the vehicle battery even after several hours. If the vehicle remains out-
doors for a long time in minus temperatures or in direct sunlight, it can take sev-
eral hours until the internal temperature of the vehicle battery reaches a suitable
temperature for proper operation of the START STOP system.
■
If the Climatronic is running in automatic mode, it is possible that under certain
conditions the engine may not switch off automatically.
Starting/shutting down the engine
Fig. 143
Instrument cluster display: En-
gine shut down (STOP phase)
First read and observe the introductory information and safety warn- ings on page 158.
Vehicles with manual transmission
›
Stop the vehicle (where necessary, apply the handbrake).
›
Put the gear stick into Neutral.
›
Release the clutch pedal.
Automatic engine shut down (STOP phase) takes place. A check warning icon ap-
pears in the display » Fig. 143 .›
Depress the clutch pedal.
The automatic start procedure takes place again (START phase). The warning icon
goes out.
Vehicles with automatic transmission
›
Bring the vehicle to a stop and depress the brake pedal.
Automatic engine shut down takes place. A check warning icon appears in the display » Fig. 143 .
›
Release the brake pedal.
The automatic start procedure takes place again. The warning icon goes out.
Further information on automatic transmissionEngine shut down takes place when the selector lever is in positions P, D/S , N
and in Tiptronic mode.
When the selector lever is in position P the engine remains shut down after you
release the brake pedal. Start the engine by pressing the gas pedal or by moving
the selector lever into a different mode and releasing the brake pedal.
If the selector lever is moved into position R during the STOP phase , the engine
will re-start.
There is no automatic engine shutdown if the system detects a vehicle move-
ment due to a large steering angle, or when the selector lever is moved to posi-
tion R (e.g. when parking).
No automatic engine shutdown takes place when the vehicle is moving at low speed (e.g. during a traffic jam or when tuning) and remains stationary after
pressing the brake pedal lightly. Automatic engine shutdown takes place if you press the brake pedal down with more force.
159Assist systems