Note■The engine running noises may be louder at first for a short time after start-
ing the cold engine.■
You should not switch on any major electrical components during the heat-
ing period, otherwise the vehicle battery will be drained unnecessarily.
■
After switching off the ignition, the radiator fan may (also intermittently)
continue to operate for approx. 10 minutes.
Problems with the engine start - vehicles with starter button
Fig. 105
Starting the engine - Press the
button with the key
Read and observe and on page 86 first.
If no engine start is possible and the display of the instrument cluster shows a
message that the key could not be detected by the system or there is a system
fault, then try to start the engine as follows.
›
Press the starter button with the key » Fig. 105.
If the engine does not start, the help of a specialist garage is required.
CAUTION
The key may not be detected by the system if the battery in the key is running
out of charge or the signal fails (strong electromagnetic field) or is shielded
(e.g. in an aluminium case).
START-STOPsystem
Introduction
This chapter contains information on the following subjects:
Operation
88
Manually deactivating/activating the system
89The START STOPsystem (hereinafter referred to as the system) reduces
CO 2emissions and harmful emissions, and saves fuel.
If the system determine that the engine is not needed when the vehicle stops
(e.g. at the traffic lights), it turns off the engine and starts it again when mov-
ing off.
The system function depends on many factors. Some of them are down to the
driver, while others are systemic and can neither be influenced nor identified.
For this reason, the system may react differently in situations which seem
identical from the driver's perspective.
The system is automatically activated every time the ignition is switched on
(even when it has previously been manually deactivated with the button).
Note
If the engine has stopped due to the system, the ignition remains switched on.
Operation
Fig. 106
Display
Vehicles with manual transmission
The engine is automatically switched off as soon as the vehicle comes to a
halt, the shift lever is moved into neutral and the clutch pedal is released.
The engine is automatically started as soon as the clutch pedal is depressed.
Vehicles with automatic transmission
The engine is automatically switched off as soon as the vehicle comes to a
halt and the brake pedal is operated.
The engine is automatically started as soon as the brake pedal is released.
88Driving
Requirements for the system to function correctly
The following conditions must be met for the system to function correctly.
The driver's door is closed.
The driver has fastened the seat belt.
The driving speed was higher than 4 km/h after the last stop.
No trailer or other accessory is connected to the trailer socket.
System status
The system status is shown in the display when the vehicle comes to a halt
» Fig. 106 .
The engine is switched off automatically; when moving off, the ignition
process will be initiated automatically.
The engine is not switched off automatically.
The engine does not shut down when the vehicle stops, if e.g. the following
applies.
▶ The engine temperature for the proper function of the system has not yet
been reached.
▶ The charge state of the vehicle battery is too low.
▶ The current consumption is too high.
▶ High air conditioning or heating output (high fan speed, big difference be-
tween the desired and actual interior temperature).
If the engine has shut down automatically but the system detects that the en- gine is required to run (e.g. if the brake pedal is pressed repeatedly) then the
system automatically starts up the engine.
More information about the current system status can be displayed on the In-
fotainment screen » Owner´s Manual - Infotainment .
If there is a system fault , the following message will appear in the display of
the instrument cluster. Seek help from a specialist garage.Note■ If the driver's seat belt is removed for more than 30 seconds or the driver's
door is opened after the engine has switched off automatically, the engine will
have to be restarted manually.■
No automatic engine shut-down takes place when a vehicle with automatic
transmission is moving at low speed (e.g. during a traffic jam) and remains sta-
tionary after pressing the brake pedal lightly. Automatic engine shut-down
takes place if you press the brake pedal down with more force.
■
For vehicles with automatic transmission there is no automatic engine shut-
down when the system detects a manoeuvring action due to a large steering
angle.
Manually deactivating/activating the system
Fig. 107
Button for the START-STOP sys-
tem
›
To deactivate/activate the system, press the
button » Fig. 107 .
When the system is deactivated, the symbol
in the button lights up.
If the system is deactivated, it will be reactivated automatically after the igni-
tion has been switched off and on.
Note
If the system is deactivated when the engine is turned off automatically, then
the automatic start process takes place.
Brakes and parking
Introduction
This chapter contains information on the following subjects:
Handbrake
90
Parking
91
89Starting-off and Driving
The wear and tear on the brake pads is dependent on the operating condi-
tions and driving style. In difficult conditions (e.g. urban, sporty driving), the
condition of the brakes should be checked between services by a specialist ga-
rage.
Brake response can be slower if the brakes are covered in moisture or, in win-
ter, have a layer of ice or salt on them . The brakes should be cleaned and
dried by applying the brakes many times over »
.
Corrosion on the brake discs and dirt on the brake pads can occur if the vehicle
has been parked for a long period and if you do not make much use of the
braking system. The brakes are cleaned by applying the brakes several times
over »
.
Before negotiating a long or steep gradient , reduce speed and shift down a
gear. As a result, the braking effect of the engine will be used, reducing the
load on the brakes. If, nevertheless, there is a need for additional braking, it
should be carried out at intervals.
Emergency braking warning - if it is necessary to brake hard, the system may
cause the brake lights to automatically flash, to alert the traffic behind.
New brake pads must first be “run in” because these do not initially have the
best possible braking effect. Drive especially carefully for the first 200 km or
so.
If the brake fluid level is too low, it can cause faults in the braking system ;
the warning light will light up in the instrument cluster
» page 30,
Braking
system . If the warning light does not light up, yet the stopping distance is per-
ceived to be longer than before, the driving style should be adapted in view of
the unknown cause of the problem, and braking kept to a minimum - seek the
help of a specialist garage without delay.
The brake booster increases the pressure generated with the brake pedal. The
brake booster only operates when the engine is running.
WARNING■ Greater physical effort is required for braking when the engine is switch-
ed off – risk of accident!■
The clutch pedal must be actuated when braking on a vehicle with man-
ual transmission, when the vehicle is in gear and at low revs. Otherwise,
the functionality of the brake system may be impaired – risk of accident!
WARNING (Continued)■ Do not depress the brake pedal if there is no requirement to slow down.
This causes the brakes to overheat and can also result in a longer braking
distance and excessive wear - risk of accident!■
Only brake for the purpose of drying and cleaning the brake discs if the
traffic conditions permit this. Do not place any other road users in jeopardy.
■
Recommendations for new brake pads should be followed.
■
When stopping and parking, the parking brake should always be applied
firmly, otherwise the vehicle could move off - risk of accident!
■
If a front spoiler, full wheel trim, etc. is mounted retrospectively, it must
be ensured that the air supply to the front wheel brakes is not reduced.
Otherwise, the front brakes could be in danger of overheating – risk of acci-
dent!
Handbrake
Fig. 108
Handbrake
Read and observe on page 90 first.
The handbrake secures the vehicle against unwanted movement when stop-
ping and parking.
Apply
›
Pull the handbrake lever firmly upwards.
Releasing
›
Pull the handbrake lever up slightly and at the same time push in the locking
button » Fig. 108 .
›
Move the lever right down while pressing the lock button.
The handbrake warning light
lights up when the handbrake is applied, pro-
vided the ignition is on.
90Driving
WARNINGThe general information relating to the use of assistance systems must be
observed » page 96, in section Introduction .
Stability Control (ESC)
Read and observe
on page 97 first.
The ESC improves vehicle stability when driving at the limit (e.g. if the vehicle
starts to skid) by braking individual wheels to maintain the desired direction.
If there is a TCS intervention, the warning light flashes in the instrument
cluster.
Anti-lock braking system (ABS)
Read and observe
on page 97 first.
ABS prevents the wheels from locking when braking. Thereby, it helps the
driver to maintain control of the vehicle.
The intervention of the ABS is noticeable from the pulsating movements of
the brake pedal which is accompanied by noises.
When the ABS system is active, do not brake periodically or reduce the pres- sure on the brake pedal.
Engine drag torque control (MSR)
Read and observe
on page 97 first.
MSR counteracts the tendency of the drive wheels to lock during downshifts
or sudden deceleration (e.g. on icy or an otherwise slippery road surface).
If the drive wheels should lock, then the engine speed is automatically in-
creased. This reduces the braking effect of the engine and the wheels can ro-
tate freely again.
Traction control (TCS)Fig. 115
Button for the TCS system
Read and observe on page 97 first.
TCS prevents the spinning of the wheels of the driven axle. TCS reduces the
drive power transmitted to the wheels in the case of slipping wheels. Thereby,
for example, driving on road surfaces with low grip is made easier.
During a TCS intervention, the indicator light flashes in the instrument clus-
ter.
The deactivation/activation of TCS can be carried out, depending on equip-
ment, in one of the following ways. ▶ Infotainment » Owner's Manual - Infotainment .
▶ By pressing the
» Fig. 115 button.
With deactivation , the warning light
lights
up in the instrument cluster and
an appropriate message is displayed in the instrument cluster.
With activation , the warning light
is
extinguished and an appropriate mes-
sage is displayed in the instrument cluster.
The TCS should normally always be enabled. The system should be deactivated
only in the following situations, for example. ▶ When driving with snow chains.
▶ When driving in deep snow or on a very loose surface.
▶ When “rocking a car free” when it has become stuck.
97Assist systems
Operation descriptionFig. 125
Cruise control system controls
Read and observe on page 103 first.
Overview of the CCS controls » Fig. 125AActivate CCS (control deactivated) Interrupt control (sprung position) Deactivate CCS (delete set speed)BTake control again a)
/ Increase speedCStart control / reduce speedDSwitching between CCS and speed limitera)
If no speed is set the current speed is adopted.
Once the controls are activated, the CCS maintains the vehicle at the set
speed; the warning light lights up in the instrument cluster.
Controls are automatically interrupted if any of the following occur.
▶ The brake pedal is operated.
▶ When one of the brake assist systems (e.g. ESC) intervenes.
▶ Through an airbag deployment.
▶ By pressing the
D
button.
WARNING■ Always deactivate the cruise control system after use to prevent the sys-
tem being switched on unintentionally.■
Control may only be resumed if the set speed is not too high for the cur-
rent traffic conditions.
Note■ During control, speed can be increased by pressing the accelerator pedal. Re-
leasing the accelerator pedal will cause the speed to drop again to the set
speed.■
By pressing the
D
button during the regulation, this is cancelled and the
speed limiter is activated.
Speed limiter
Introduction
This chapter contains information on the following subjects:
Operation
104
Description of operation
105
The speed limiter limits the maximum driving speed to the set speed limit.
This limit can only be exceeded by depressing the accelerator pedal fully.
The condition in which the Speed Limiter monitors a potential set speed limit
excess is referred to as regulation.
WARNINGThe general information relating to the use of assistance systems must be
observed » page 96, in section Introduction .
Operation
Fig. 126
MAXI DOT display: Examples of speed limiter status displays
104Driving
Fig. 127
Segment display: Examples of speed limiter status displays
Read and observe
on page 104 first.
Status displays of the speed limiter » Fig. 126, » Fig. 127
Speed limit set, but regulation is inactive.
Control is active.
No speed limit set.
System fault - seek assistance from a specialist garage immediately.
Basic requirements for start of control The speed limiter is activated.
The current speed is higher than 30 km/h.
Description of operation
Fig. 128
Operating elements of the speed
limiter
Read and observe on page 104 first.
Overview of the control elements of the speed limiter » Fig. 128AActivate CCS (required condition for the subsequent activation of
the speed limiter) To activate the speed limiter, set the switch to position , then
press D
to operate. Interrupt control (sprung position) Disable speed limiter (set limit delete)BTake control again a)
/ increase speed - press (in increments of 1
km/h), hold (in increments of 10 km/h)CStart regulation / reduce speed - press (in increments of 1 km/h),
hold (in increments of 10 km/h)DSwitching between CCS and speed limitera)
If no speed limit is set, the current speed is set as the speed limit.
After starting the system, the current speed is set as the speed limit, the
warning light lights up in the instrument cluster.
Exceeding the speed limit during the regulation
If, during the control, it is necessary to exceed the speed limit (e.g. to over-
take), the accelerator pedal must be pressed fully.
When exceeding the speed limit (e.g. driving down a hill), an acoustic signal
sounds and the warning light flashes in the instrument cluster.
The regulation is resumed once the speed has fallen below the set limit.
Note
By pressing the button D during the regulation, this is cancelled and the CCS
is activated.
Front Assist
Introduction
This chapter contains information on the following subjects:
Radar sensor
106
Operation
106
Distance warning
107
Warning and automatic braking
107
Deactivation/activation
108
Malfunctions
108
105Assist systems
The Front Assist (hereinafter referred to as the system) warns you of the dan-
ger of a collision with a vehicle or another obstacle in front of the vehicle, and
tries to avoid a collision or mitigate its consequences by automatically applying
the brakes where necessary.
The area in front of the vehicle is monitored by a radar sensor » Fig. 129 on
page 106 .WARNING■
The general information relating to the use of assistance systems must
be observed » page 96, in section Introduction .■
The system does not respond to crossing or oncoming objects.
CAUTION
In case of failure of more than one brake light on the vehicle or on the electri-
cally connected trailer, the system becomes unavailable.
Radar sensor
Fig. 129
Installation location of the radar
sensor
Read and observe and on page 106 first.
The radar sensor » Fig. 129(hereinafter referred to as the sensor) may detect
objects by emitting and receiving electromagnetic waves.
The sensor function may be impaired in the events of one of the following. ▶ The sensor cover is soiled (e.g. with mud, snow and the like).
▶ The area in front of and around the sensor cover is obscured (e.g. by labels,
auxiliary headlights and the like).
▶ When visibility is poor, (e.g. fog, heavy rain, thick snowfall).
If the sensor is dirty or covered, the corresponding message appears on the
display of the instrument cluster » page 108, Malfunctions .
WARNING■
If you suspect that the sensor is damaged, deactivate the system. Have
the sensor checked by a specialist garage.■
A collision or damage in the front or lower area of the vehicle could affect
the sensor function - there is risk of accident! Have the sensor checked by
a specialist garage.
■
Do not cover the area in front of and around the sensor cover. This can
lead to impaired function of the sensor - risk of accidents!
CAUTION
Remove the snow with a brush and the ice with a solvent-free de-icer.
Operation
Read and observe
and on page 106 first.
The system support is provided in the following manner.▶ Alerts you about a dangerous proximity to the vehicle ahead.
▶ Warns you of an impending collision.
▶ Assists with a brake action triggered by the driver.
▶ If the driver fails to respond to a detected danger, an automatic braking ac-
tion is performed.
The system can work only if the following basic conditions are met. The system is activated.
TCS is activated » page 97.
The vehicle is travelling forwards at a speed of more than approx. 5 km/h.
Note
The system can be impaired or may not be available, for example when driving
in “sharp ”curves or with an ESC engagement » page 97.106Driving
Distance warningFig. 130
Instrument cluster display: Distance warning
Read and observe and on page 106 first.
The display of the distance warning is for vehicles with MAXI DOT display.
If a safe distance from the vehicle ahead is fallen short of, the warning light
» Fig. 130 appears in the display.
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.
Warning and automatic braking
Fig. 131
Instrument cluster display: Warning or emergency
braking at low speed
Read and observe and on page 106 first.
Emergency braking at low speed
If there is a risk of collision in a vehicle speed range of about 5 km/h to 30 km/h, the system triggers an automatic braking.
With automatic braking, the warning light
» Fig. 131 appears in the display.
Advance warning
If the system detects a risk of collision, the warning light » Fig. 131 appears
in the display and you will hear an acoustic signal.
The pre-warning display can occur in the following situations.
▶ If there is a risk of collision with a moving obstacle at a driving speed range
of approx. 30 km/h to approx. 210 km/h.
▶ If there is a risk of collision with a stationary obstacle at a driving speed
range of approx. 30 km/h to approx. 85 km/h.
With a warning the brake pedal must be pressed or the moving obstacle is to
be avoided!
Acute alert
If the driver does not react to the advance warning when in danger of a colli-
sion with a moving obstacle, the system briefly applies the brake automatically
via an active brake intervention to draw attention to the potential danger of a
collision again.
Automatic Braking
If the driver does not respond to the acute warning, the system begins to au-
tomatically brake the vehicle.
If an automatic brake intervention is triggered by the system, the pressure in
the brake system increases and the brake pedal cannot be operated with the
normal pedal stroke.
The automatic braking interventions can be cancelled by pressing the acceler-
ator pedal or by steering intervention.
Brake assist
If the driver brakes inadequate with an impending collision, the system auto-
matically increases braking force.
The braking assistance only occurs as long as the brake pedal is being firmly
pressed down.107Assist systems