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DRIVER SUPPORT
310With Adaptive Cruise Control in
standby mode:
1. Press the
▶ button on the steering wheel (6).
> The
symbol will change to Pilot
Assist in standby mode (8).
2. Press the
button on the steering wheel
(2).
> Pilot Assist will start and the current speed will be stored, which will be shown by numbers in the center of the speedom-eter.
...or... With Adaptive Cruise Control started:
–Press the ▶ button on the steering wheel (6).
> Pilot Assist will start.
Pilot Assist's steering assis- tance is only active when thesteering wheel symbol (2)changes from GRAY toGREEN. Pilot Assist will only regulate
the time interval to the vehicle ahead when the distance symbol shows a vehicle (1) over thesteering wheel symbol.
A speed interval will be marked at the same time. The higher speed is the set speed for your vehicle and thelower speed is the speed of thevehicle ahead (target vehicle).
Hands on the steering wheelPilot Assist only functions if the driver's hands are on the steering wheel. If Pilot Assist detectsthat the driver's hands are not on the steeringwheel, the driver will be instructed to activelysteer the vehicle by a text message and an audi-ble signal. If Pilot Assist still cannot detect the driver's hands on the steering wheel, the function will gointo standby mode. Pilot Assist must then be reactivated by pressing the
button on the
steering wheel.
NOTE
Note that the Pilot Assist function only works when the driver's hands are on the steeringwheel.
Related information
• Pilot Assist (p. 305)
Managing Pilot Assist speed Pilot Assist can be set to various speeds.
Setting/changing set speed
Note: This illustration is general and details may vary depending on model and market.
: Increases the set speed
: Reduces the set speed
Set speed
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–Change a set speed by pressing the (1)
or
(2) buttons briefly or by pressing and
holding them:
• Press briefly
: Press briefly: each press
changes the speed in +/- 5 mph (+/- 5 km/h) increments.
• Press
and hold: Release the button when
the set speed indicator (3) has moved tothe desired speed.
• The most recently set speed will be stored.
If speed is increased by depressing the accelera- tor pedal while pressing the
button on the
steering wheel, the vehicle's speed when the but- ton is pressed will be stored as the set speed. Temporarily increasing speed using the accelera- tor pedal, e.g. when passing another vehicle, willnot affect the setting. The vehicle will return tothe set speed when the accelerator pedal isreleased.
Automatic transmission
Pilot Assist can follow another vehicle at speeds from a standstill up to 200 km/h (125 mph). The lowest speed that can be set for Pilot Assist is 30 km/h (20 mph). When following anothervehicle, ACC can monitor that vehicle's speedand slow your own vehicle down to a standstill,but it is not possible to set speeds lower than30 km/h (20 mph). The highest possible speed that can be set is200 km/h (125 mph).
Related information
•
Pilot Assist (p. 305)
Setting a time interval for PilotAssist
Pilot Assist can be set to different time intervals.
Different time intervals to the vehicle ahead can be selectedand are shown in the instru-ment panel as 1–5 horizontalbars. The more bars, the longerthe time interval. One bar rep-resents an interval of
approx. 1 second to the vehicle ahead. 5 barsrepresents approx. 3 seconds.
NOTE
When the symbol in the instrument panel shows a vehicle and a steering wheel, PilotAssist follows a vehicle ahead at a presettime interval. When only a steering wheel is shown, there is no vehicle ahead within a reasonable dis-tance.
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313
Deactivating/reactivating PilotAssist
Pilot Assist can be temporarily put into standby mode and then reactivated.
Deactivating and putting Pilot Assist in standby mode
Note: This illustration is general and details may vary depending on model.
To temporarily deactivate Pilot Assist and put it in standby mode:
–Press the button on the steering wheel
(2).
> Pilot Assist goes into standby mode - the symbol (8) in the instrument panel changes color from WHITE to GRAY andthe set speed in the center of the speed-ometer will change from BEIGE to GRAY. ...or...
–Press the
◀ button on the steering wheel (3).
> Pilot Assist is turned off and Adaptive Cruise Control will go into active mode.
WARNING
• With Pilot Assist in standby mode, the driver must intervene and steer and regu-late both speed and distance to the vehi-cle ahead.
• If the vehicle comes too close to a vehicleahead when Pilot Assist is in standbymode, the driver is instead warned of theshort distance by the Distance Alert func-tion.
Standby mode due to action by the driver
Pilot Assist will be temporarily deactivated and put in standby mode if:
• the brakes are applied.
• the gear selector is moved to
N
• a turn signal is used for more than 1 minute.
• the vehicle is driven faster than the setspeed for more than 1 minute
Temporarily increasing speed using the accelera-tor pedal, e.g. when passing another vehicle, willnot affect the setting. The vehicle will return to the set speed when the accelerator pedal isreleased. When the turn signals are used, Pilot Assist's steering assistance will be temporarily deacti-vated. When the turn signal is switched off, steer-ing assistance will be automatically reactivated ifthe traffic lane's side markings can still bedetected.
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314
Automatic standby mode
Pilot Assist is dependent on other systems, such as Electronic Stability Control (ESC65
). If any of
these other systems stops working, Pilot Assist will automatically switch off.
WARNING
With automatic standby mode, the driver is warned by an acoustic signal and a messageon the instrument panel. • The driver must then regulate vehicle speed, apply the brakes if necessary, andmaintain a safe distance to other vehicles.
Adaptive Cruise Control may go into standbymode if, e.g.: • the driver opens the door.
• the brake temperature is high.
• the driver's hands are not on the steering wheel.
• the parking brake is applied.
• the engine speed (rpm) is too low/high.
• the driver unbuckles the seat belt.
• one or more of the wheels lose traction.
• the camera/radar sensor is covered by snowor heavy rain (the camera lens/radar wavesare blocked) •
your vehicle's speed goes below 5 km/h(3 mph) and Pilot Assist cannot determine ifthe vehicle ahead is stationary or if it isanother object, e.g. a speed bump.
• your vehicle's speed goes under 5 km/h(3 mph) and the vehicle ahead turns so thatPilot Assist no longer has a vehicle to follow.Reactivating Pilot Assist from standby
mode
Note: This illustration is general and details may vary depending on model.
To reactivate Pilot Assist:
–Press the button on the steering wheel
(1).
> Speed will be set to the most recently stored speed.
WARNING
A noticeable increase in speed may follow when the speed is resumed with the
steering wheel button.
Related information
• Pilot Assist (p. 305)
65
Electronic Stability Control
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Switching target vehicles with PilotAssist
At certain speeds, models with automatic trans-
missions and Pilot Assist can switch target vehi-cles.
Switching target vehicles
If the target vehicle ahead turns suddenly, there may be stationary traffic ahead.
When Pilot Assist is actively following another vehicle at speeds under 30 km/h (20 mph) and
switches targets from a moving vehicle to a sta-
tionary vehicle, Pilot Assist will brake for the sta-tionary vehicle.
WARNING
When Pilot Assist follows another vehicle at speeds over approx. 30 km/h (20 mph) and
changes target vehicle – from a moving vehi- cle to a stationary one – Pilot Assist will ignore the stationary vehicle and instead
accelerate to the stored speed.
• The driver must then intervene and apply the brakes.
Automatic standby mode when switching
targets
Pilot Assist disengages and goes into standby mode if:
• your vehicle's speed goes below 5 km/h(3 mph) and Pilot Assist cannot determine ifthe target object is a stationary vehicle oranother object, e.g. a speed bump.
• your vehicle's speed goes under 5 km/h(3 mph) and the vehicle ahead turns so thatPilot Assist no longer has a vehicle to follow.
Related information
•Pilot Assist (p. 305)
Automatic braking with Pilot Assist
Pilot Assist has a special braking function in slow traffic and at a standstill.
Braking function in slow traffic and at a standstill
In slow-moving, stop-and-go traffic or when stop- ped at a traffic light, driving will resume automati-cally if the vehicle is stopped for less thanapprox. 3 seconds. If it takes more than 3 sec-onds for the vehicle ahead to begin moving again,Pilot Assist will go into standby mode and theAuto-hold brake function will activate.
–Pilot Assist can be reactivated by:
• Pressing the
button on the steering
wheel keypad.
• Pressing the accelerator pedal.
> Pilot Assist will resume following the vehi- cle ahead if it begins to move within approx. 6 seconds.
NOTE
Pilot Assist can keep the vehicle stationary for no more than 5 minutes – after that timethe parking brake is applied and the functionis deactivated. The parking brake must be released before Pilot Assist can be reactivated.
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318
The driver is responsible for ensuring that the vehicle maintains a suitable distancefrom such obstacles.
• The camera and radar sensors do nothave the capacity to detect all oncomingobjects and obstacles in traffic environ-ments, e.g. potholes, stationary obstaclesor objects that completely or partiallyblock the route.
• Pilot Assist does not "see" pedestrians,animals, etc.
• The recommended steering input is lim-ited in force, which means that it cannotalways help the driver to steer and keepthe vehicle within the lane.
• Pilot Assist is switched off if the powersteering is working with reduced power -e.g. during cooling due to overheating(see section "Speed-dependent steeringforce").
The driver can always correct or adjust steeringassistance provided by Pilot Assist by turning thesteering wheel to the desired position.
Steep roads and/or heavy loadsPilot Assist is primarily intended to be driven onflat roads. The function may not be able to main-tain the correct time interval to the vehicle aheadwhen driving down steep hills. The driver should be extra attentive and prepared to apply thebrakes.
• Do not use Pilot Assist if the vehicle is carry-ing a heavy load or towing a trailer.
NOTE
Pilot Assist cannot be activated if a trailer, bike carrier or similar is connected to thevehicle electrical system.
Other limitations
•
The Off Road drive mode cannot be
selected when Pilot Assist is activated.
NOTE
The function uses the vehicle's camera unit, which has some general limitations – see thesection "Camera unit limitations".
NOTE
The function uses the vehicle's radar unit, which has some general limitations – see thesection "Radar unit limitations".
Related information
• Pilot Assist (p. 305)
• Speed-dependent steering wheel resistance (p. 266)
Pilot Assist
* symbols and messages
A number of symbols and messages relating to Pilot Assist may be displayed in the instrument panel and/or the head-up display *.
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319
Several examples
67
are provided below.
The previous illustration 68
shows that Pilot Assist
is set to maintain a speed of 110 km/h (68 mph) and that there is no target vehicle ahead to fol-low. Pilot Assist will not provide any steering assis- tance because it cannot detect the lane's sidemarking lines.
The previous illustration 68
shows that Pilot Assist
is set to maintain a speed of 110 km/h (68 mph) and is following a target vehicle ahead that istraveling at the same speed. Pilot Assist will not provide any steering assis- tance because it cannot detect the lane's sidemarking lines.The previous illustration 68
shows that Pilot Assist
is set to maintain a speed of 110 km/h (68 mph) and is following a target vehicle ahead that istraveling at the same speed. In this example, Pilot Assist will also provide steering assistance because it can detect thelane's side marking lines.
67 In the following illustration, Road Sign Information (RSI) indicates that the maximum permitted speed is 130 km/h (80 mph).
68 Note: This illustration is general and details may vary depending on model.
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DRIVER SUPPORT
* Option/accessory.
320
The previous illustration 68
shows that Pilot Assist
is set to maintain a speed of 110 km/h (68 mph) and that there is no target vehicle ahead to fol-low. In this example, Pilot Assist will provide steering assistance because it can detect the lane's sidemarking lines.
Related information
• Pilot Assist (p. 305)
Radar sensor
The radar sensor is used by several driver sup- port systems to detect other vehicles.
Note: This illustration is general and details may vary depending on model.
The radar sensor is used by the following func- tions:
• Distance Alert
*
• Adaptive Cruise Control
*
• Lane Keeping Aid
• Pilot Assist
*
• City Safety
Any modifications to the radar sensor may makeits use illegal.
Related information
• Radar sensor limitations (p. 321)
• Recommended maintenance for the radarsensor (p. 324)
• Radar sensor type approval (p. 324)
68
Note: This illustration is general and details may vary depending on model.