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WARNING
A noticeable increase in speed may follow
when the speed is resumed with the steering wheel button.
Related information
Pilot Assist (p. 281)
Activating and starting Pilot Assist (p. 284)
Pilot Assist limitations
Pilot Assist functionality may be reduced in cer-tain situations.
Pilot Assist is a driver support function designedto simplify driving and assist the driver in manysituations. However, the driver is always responsi-ble for maintaining a suitable distance to vehiclesor objects around it and ensuring that the vehicleis correctly positioned in the traffic lane.
WARNING
In some situations, Pilot Assist may have trou-ble helping the driver properly or may bedeactivated automatically – we advise againstusing Pilot Assist in such cases. Examples ofsuch situations include:
the lane markings are worn, missing orcross each other.
lane division is unclear, for example, whenthe lanes divide or merge or at exits orwhen there are multiple sets of markings.
edges or other lines than lane markingsare present on or near the road, e.g.curbs, joints or repairs to the road sur-face, edges of barriers, roadside edges orstrong shadows.
the lane is narrow or winding.
the lane contains ridges or holes.
weather conditions are poor, e.g. rain,snow or fog or slush or reduced visibilitywith poor light conditions, backlighting,wet road surface, etc.
The driver should also note that Pilot Assisthas the following limitations:
High curbs, roadside barriers, temporaryobstacles (traffic cones, safety barriers,etc.) are not detected. Alternatively, theymay be detected incorrectly as lane mark-ings, with a subsequent risk of contactbetween the vehicle and such obstacles.
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The driver is responsible for ensuring thatthe 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.
In vehicles equipped with SensusNavigation*, the function is able to useinformation from map data, which couldcause variations in performance.
Pilot Assist will be switched off if thespeed-dependent power steering wheelresistance is working at reduced power,e.g. during cooling due to overheating.
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 loads
Pilot 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 shouldbe 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 beselected when Pilot Assist is activated.
NOTE
The function uses the vehicle's camera andradar sensor, which has certain general limita-tions.
Related information
Pilot Assist (p. 281)
Camera/radar sensor limitations (p. 300)
Speed-dependent steering wheel resistance(p. 260)
Drive modes (p. 412)
Pilot Assist* symbols and messages
A number of symbols and messages relating toPilot Assist may be displayed in the instrumentpanel and/or the head-up display*.
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Several examples33 are provided below.
The previous illustration34 shows that Pilot Assistis 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 illustration34 shows that Pilot Assistis 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 illustration34 shows that Pilot Assistis 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 providesteering assistance because it can detect thelane's side marking lines.
33In the following illustration, Road Sign Information (RSI) indicates that the maximum permitted speed is 130 km/h (80 mph).34Note: This illustration is general and details may vary depending on model.
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The previous illustration34 shows that Pilot Assistis 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 provide steering assistancebecause it can detect the lane's side markinglines.
Related information
Pilot Assist (p. 281)
Collision risk warning from driversupport
The driver support systems Pilot Assist and
Adaptive Cruise Control*35 can help alert thedriver if the distance to the vehicle ahead sud-denly decreases to an unsafe distance.
Collision warning audible signal and symbol.
Acoustic collision warning signal
Collision warning symbol
Camera/radar sensor distance monitoring
Driver support uses approx. 40% of the vehicle'sbraking capacity. If a situation requires morebraking force than driver support can provide, andif the driver does not apply the brakes, a warning
light and audible warning signal will be activatedto alert the driver that immediate action isrequired.
WARNING
The driver support system only issues a warn-ing for vehicles detected by its radar unit –thus, a warning may come after a delay or notat all. Never wait for a warning. Apply thebrakes when necessary.
Collision warning symbol on the windshield.
In vehicles equipped with a head-up display*, aflashing warning symbol will be displayed on thewindshield.
34Note: This illustration is general and details may vary depending on model.35Adaptive Cruise Control
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NOTE
Visual warnings on the windshield may be dif-ficult to notice in cases of strong sunlight,reflections, extreme light contrasts, or if thedriver is wearing sunglasses or is not lookingstraight ahead.
Related information
Driver support systems (p. 260)
Adaptive Cruise Control* (p. 272)
Pilot Assist (p. 281)
Distance Alert* (p. 270)
Head-up display* (p. 140)
Switching target vehicles with driversupport
At certain speeds, vehicles with automatic trans-missions and the driver support functions Adap-
tive Cruise Control*36 and Pilot Assist canswitch target vehicles.
Switching target vehicles
If the target vehicle ahead turns suddenly, there may bestationary traffic ahead.
When driver support is actively following anothervehicle at speeds under 30 km/h (20 mph) andswitches targets from a moving vehicle to a sta-tionary vehicle, driver support will brake for thestationary vehicle.
WARNING
When driver support follows another vehicle atspeeds over approx. 30 km/h (20 mph) andchanges target vehicle – from a moving vehi-cle to a stationary one – driver support willignore the stationary vehicle and insteadaccelerate to the stored speed.
The driver must then intervene and applythe brakes.
Automatic standby mode when switching
targets
Driver support disengages and goes into standbymode if:
your vehicle's speed goes under 5 km/h(3 mph) and driver support cannot determineif the target vehicle 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 thatdriver support no longer has a vehicle to fol-low.
Related information
Driver support systems (p. 260)
Adaptive Cruise Control* (p. 272)
Pilot Assist (p. 281)
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Set time interval for driver support
The time interval to the vehicle ahead can be set
for the functions Adaptive Cruise Control*37,Pilot Assist and Distance Alert*.
Different time intervals to thevehicle 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 ofapprox. 1 second to the vehicle ahead. 5 barsrepresents approx. 3 seconds.
NOTE
When the symbol in the instrument panelshows a vehicle and a steering wheel, PilotAssist follows a vehicle ahead at a presettime interval.
When only a steering wheel is shown, there isno vehicle ahead within a reasonable dis-tance.
NOTE
When the symbol in the instrument panelshows two vehicles, ACC is following the vehi-cle ahead at a preset time interval.
When only one vehicle is shown, there is novehicle ahead within a reasonable distance.
Controls for setting a time interval.
Reduce the time interval
Increase the time interval
Distance indicator
–Press the (1) or (2) button to decrease orincrease the time interval.
>The distance indicator (3) shows the cur-rent time interval.
In order to help your vehicle follow the vehicleahead as smoothly and comfortably as possible,Adaptive Cruise Control allows the time intervalto vary noticeably in certain situations. At lowspeeds, when the distance to the vehicle aheadis short, Adaptive Cruise Control increases thetime interval slightly.
NOTE
The greater the vehicles' speed, thegreater the distance between them for aset time interval.
Only use the time intervals permitted bylocal traffic regulations.
If driver support does not seem torespond with a speed increase when acti-vated, it may be because the time intervalto the vehicle ahead is shorter than theset time interval.
WARNING
Only use a time interval suitable for thecurrent traffic conditions.
The driver should be aware that shorttime intervals give them limited time toreact and act to any unforeseen trafficsituation.
37Adaptive Cruise Control
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Related information
Driver support systems (p. 260)
Adaptive Cruise Control* (p. 272)
Pilot Assist (p. 281)
Distance Alert* (p. 270)
Head-up display* (p. 140)
Drive mode for driver support
The driver can choose different drive modes todetermine how driver support should maintain atime interval to the vehicle ahead.
Settings are made using the DRIVE MODE con-trols.
Select one of the following:
Pure - Driver support will focus on providingoptimal fuel economy, which will increase thetime interval to the vehicle ahead.
Hybrid - Driver support will focus on follow-ing the set time interval to the vehicle aheadas smoothly as possible.
Power - Driver support will focus on follow-ing the set time interval to the vehicle aheadmore exactly, which could mean faster accel-eration and heavier braking.
Related information
Driver support systems (p. 260)
Drive modes (p. 412)
Adjusting set speed for driversupport
It is possible to adjust set speeds for the SpeedLimiter, Cruise Control, Adaptive Cruise Con-
trol*38 and Pilot Assist functions.
: 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 andholding them:
Brief press: Each press changes thespeed in +/- 5 km/h (+/- 5 mph) incre-ments.
Press and hold: Release the button whenthe set speed indicator (3) has moved tothe desired speed.
NOTE
For vehicles without Adaptive Cruise Control*,speed instead increases by +/- 1km/h(+/- 1 mph) each time the button is pressed.
The most recently set speed will be stored.
If speed is increased by depressing the accelera-
tor pedal while pressing the (1) button onthe steering wheel, the vehicle's speed when thebutton 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
The driver support functions can follow anothervehicle at speeds from a standstill up to200 km/h (125 mph).
Pilot Assist can provide steering assistance fromnear-stationary speeds up to 140 km/h(87 mph).
The lowest speed that can be set is 30 km/h(20 mph). When following another vehicle, ACCcan monitor that vehicle's speed and slow yourown vehicle down to a standstill, but it is not pos-sible to set speeds lower than 30 km/h(20 mph).
Related information
Driver support systems (p. 260)
Cruise control (p. 266)
Adaptive Cruise Control* (p. 272)
Pilot Assist (p. 281)
Auto-hold braking with driversupport
Pilot Assist and Adaptive Cruise Control*
(ACC39) have a special brake function in slowtraffic and while stationary.
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,the driver support function will go into standbymode and the auto-hold brake function will acti-vate.
–The function can be reactivated by:
Pressing the button on the steeringwheel keypad.
Pressing the accelerator pedal.
>The function will resume following thevehicle ahead if it begins to move withinapprox. 6 seconds.