Get Driving -> Lane departure warning (Side Assist) with rear cross traffic alert (RCTA) and door opening warning (Exit Assist) Guide for Seat Leon 4 Door Fourth Generation (2021-2026)

Driving

Control lamp

●

Adapt your speed and safe distance to

Lane departure warning

the vehicle in front of you at all times to suit

visibility, weather, road and traffic condi-

tions.

(Side Assist) with rear cross

traffic alert (RCTA) and door

opening warning (Exit Assist)

●

Keep your hands on the wheel at all times

to be ready to intervene in the steering at

any time.

Introduction

●

Pay attention to the indicator lamps that

may come on in the external rear view mir-

rors and on the instrument cluster, and fol-

low any instructions they may give.

The lane departure warning (LCA) helps

detect traffic that is at the rear of the vehi-

cle.

●

The lane departure warning could react

Fig. 189 Control lamp of the lane departure

warning.

to any special constructions that might be

present to the sides of the vehicle, e.g. high

or irregular dividers. This may cause erro-

neous warnings.

The rear cross traffic alert (RCTA) helps

the driver when backing out of a parallel

parking spot and when manoeuvring.

The door opening warning (EWA) alerts

the occupant of a possible danger ap-

proaching from behind when opening or

when any of the vehicle’s doors are open.

●

Never use the lane departure warning on

unpaved roads. The lane departure warn-

ing has been designed for use on paved

roads.

●

Always pay attention to the vehicle's sur-

WARNING

roundings.

The smart technology incorporated into

the lane departure warning (LCA) with rear

cross traffic alert (RCTA) and the door

opening warning included cannot over-

come the limits imposed by the laws of

physics; it only works within the limits of the

system. Accidents and severe injury may

occur if the lane departure warning or the

rear cross traffic alert are used negligently

or involuntarily. The system is not a re-

placement for driver awareness.

●

The control lamps of the lane departure

warning may have limited functionality due

to solar radiation.

Fig. 190 Control lamp of the lane departure

warning.

Note

If the lane departure warning with rear

cross traffic alert does not work as descri-

bed in this chapter, stop using it and con-

tact a specialised workshop.

It lights up

It turns on once briefly: the lane departure warning is

activated and ready to operate, i.e. when activating

the system.

264

Driver assistance systems

Light indication

the vehicle may stall in traffic and cause

accidents and severe injuries.

It lights up

The control lamp provides an indication on

the corresponding side regarding the traffic

situation behind the vehicle, if it is deemed to

be critical. The control lamp of the left-hand

It lights up continuously: the lane departure warning

has detected a vehicle in the blind spot.

●

Never ignore the warning lamps or mes-

sages.

●

Carry out the necessary operations.

Flashes

side Fig. 189 indicates the traffic situation

›››

to the rear left of the vehicle, and the control

A vehicle has been detected in the adjacent lane and

the turn signal has been engaged in the direction of

CAUTION

lamp of the right-hand side Fig. 190, indi-

›››

the detected vehicle

.

›››

cates the traffic situation to the rear right of

the vehicle.

Failure to heed the control lamps and cor-

responding text messages when they light

up may result in damage to the vehicle.

For vehicles that are also equipped with Lane Assist

page 257, a warning to switch lanes will also ap-

›››

Keep the warning lamps zone of the lane de-

parture warning free of objects, adhesives or

the likes that may interfere with your visibility.

pear even though the turn signal has not been en-

gaged (Lane Assist “Plus” page 265).

›››

Lane departure warning (Side As-

sist)

The control lamps light up when the ignition is

switched on and should turn off after approxi-

mately 2 seconds. This is the time taken for

the function check.

Lane assist Plus.

The lane departure warning uses radar sen-

sors to monitor the areas behind the vehicle

The Lane Assist Plus function can be used by

If there are no indications from the control

lamp of the lane departure warning, this

means that the lane departure warning has

not detected any other vehicles at the rear

page 9. The system does this by measur-

›››

activating the Lane Assist page 257 and

›››

ing the vehicle's distance from other vehicles

and its speed differential. The lane departure

warning will not work at speeds of less than

approx. 15 km/h (9 mph).

Side Assist functions. In this case its functions

are expanded as described below.

If the driver initiates a lane change manoeu-

vre in a potential critical situation:

area

.

›››

When the exterior lighting is low, the intensity

with which the control lamps come on is dim-

med. The user can modify the intensity of the

control lamps with up to 5 levels in the info-

tainment system menu.

The lane width is not detected individually,

but is rather pre-configured in the system.

Thus if you are driving in wide lanes or in be-

tween two lanes, the indications may be in-

correct. Furthermore, the system can detect

vehicles driving in the lane next to you (if

there are any), and can also detect station-

ary objects such as dividers, and thus give an

incorrect indication.

●

The lamp flashes in the corresponding rear-

view mirror even though the turn signal has

not been activated.

●

The steering wheel vibrates to warn the

driver of the risk of collision.

WARNING

●

torque is applied to correct the steering

and return the vehicle to its lane.

If the warning lamps and the corresponding

messages are ignored when they light up,

265

Driving

erably higher speed, no indication will be dis-

played.

Driving situations

The faster the vehicle approaches, the soon-

er an indication will be displayed in the con-

trol lamp, because the lane departure warn-

ing takes into account the speed differential

with other vehicles. Thus even though the dis-

tance from the other vehicle is identical, the

indication will appear sooner in some cases

and later in others.

Physical limitations inherent to the system

In some situations the lane departure warning

may not interpret the traffic situation correct-

ly. I.e. in the following situations:

●

on tight bends;

in the case of lanes with different widths;

in areas with significant gradient changes;

in adverse weather conditions;

Fig. 192 Schematic representation:  Situa-

tion of an overtaking in the centre lane and

then moving into the right-hand lane.  Indica-

tion of the lane departure warning in the con-

trol lamp on the right side.

Fig. 191 Schematic representation:  Passing

situation with traffic behind the vehicle.  Indi-

cation of the lane departure warning in the

control lamp on the left side.

in the case of special constructions to the

side of the vehicle, e.g., high or irregular divid-

ers.

In the following situations, an indication will

be displayed in the control lamp Fig. 191 

›››

(arrow) or Fig. 192  (arrow):

›››

●

When being overtaken by another vehicle

Fig. 191 .

›››

●

When passing another vehicle Fig. 192

›››

 with a speed differential of approx. 10 km/h

(6 mph). If the vehicle is passing at a consid-

266

Driver assistance systems

played in the form of a red or yellow strip at

the back of the image of the vehicle on the in-

fotainment system screen. This strip displays

the side of the vehicle towards which traffic is

approaching in transverse direction¹⁾.

Rear cross traffic alert (RCTA)

WARNING

The smart technology incorporated into

the rear cross traffic alert cannot over-

come the limits imposed by the laws of

physics; it only works within the limits of the

system. The parking assistant function

should not tempt you into taking any risks.

The system is not a replacement for driver

awareness.

Automatic braking to reduce damages

If the rear cross traffic alert detects that

someone else on the road is approaching the

rear of the vehicle and the driver does not

step on the brake, the system will engage the

brakes automatically.

●

The system should never be used in limi-

ted visibility conditions or complicated

traffic, e.g., in high-traffic areas or when

crossing multiple lanes.

Fig. 193 Schematic representation of the rear

cross traffic alert assistant: zone monitored

around the vehicle while leaving a parking

space.

The parking system helps the driver by auto-

matically engaging the brakes to reduce any

damage. The automatic intervention on the

brakes takes place when driving in reverse at

approx. 1-12 km/h (1-7 mph). After detecting

that the vehicle is stationary, the system

keeps it that way for around 2 seconds.

●

Be sure to always be aware of the vehi-

cle's surroundings, since the system often

fails to detect things such as bicycles or

pedestrians.

Park Assist uses the radar sensors on the rear

●

The rear cross traffic alert itself will not

brake the vehicle to a complete stop.

bumper page 239 to monitor the traffic

›››

crossing behind the vehicle as it backs out of

a parallel parking space or as it is being man-

oeuvred, for example in very low visibility con-

ditions.

After automatically braking to reduce dam-

age, the system will not be able to automati-

cally brake again for approximately 10 sec-

onds.

When the system detects a relevant vehicle

on the road that is approaching the rear of

You can interrupt the automatic braking by

stepping hard on the accelerator pedal or

the brake pedal in order to regain control of

the vehicle.

the vehicle Fig. 193, an acoustic alarm

›››

may sound if the relevance so requires it.

In addition to the acoustic alarm, the driver is

also informed by means of a visual signal on

infotainment system display. This signal is dis-

1)

It is only displayed if the vehicle is equipped

with a parking system.

267

Driving

approach from behind, such as cars

Door opening warning (Exit Assist)

replace the necessary attention to be paid

by the vehicle’s occupants. The responsi-

bility for opening the doors and exiting the

vehicle always lies with the occupants of

the same.

Fig. 194.

›››

If a critical situation is detected when the

door is opened, it will be alerted by an acous-

tic signal on the door speaker of the corre-

●

The door opening warning (Exit Assist)

sponding side Fig. 195. Additionally, the

›››

operates continuously as long as the vehi-

cle ignition is on. Otherwise, the system is

deactivated and the lamps light up briefly.

control lamp of the lane departure warning of

the corresponding door will flash. If the door

has already been opened and another road

user has been detected in a critical situation,

the control lamp of the lane departure warn-

ing on the corresponding side will light up

permanently.

●

It is possible that the traffic situation is

not interpreted correctly and you cannot

be aware of all the objects that are ap-

proaching, such as pedestrians. Always

visually monitor the traffic and the area

surrounding the vehicle.

Fig. 194 Graphic example

The brightness of the door opening warning

indication cannot be adjusted.

When you want to access the vehicle for the

first time, with the doors closed and locked,

the function will be available 3 minutes after

the first opening of any of the doors. The

function will continue to be available as long

as the vehicle has the ignition connected and

is not moving.

WARNING

The door opening warning (Exit Assist) is

subject to system limits and cannot warn of

an imminent collision in all cases:

●

If your vehicle is too deep in the parking

space and the adjacent vehicles hide it.

●

In certain circumstances, objects or peo-

After switching off the ignition, the function

will remain available for approximately 3 mi-

nutes. After that time, the control lamps will

light up indicating the deactivation of the

function.

ple who approach, e.g. on a bicycle or

scooter, are not detected.

Fig. 195 Door: warning lamp

●

The system does not react to stopped

The door opening warning (Exit Assist) warns

occupants of a possible collision when open-

ing the door when the vehicle is stationary.

The system monitors, within the limits of the

system itself, the rear and side environment of

the vehicle using the rear sensors

objects.

Note

WARNING

●

The door opening warning (Exit Assist) is

●

Always pay close attention to the traffic

activated/deactivated in the Driver assis-

tance Menu.

and the surroundings of the vehicle. The

door opening warning (Exit Assist) cannot

page 239. It detects moving objects that

›››

268

Driver assistance systems

Open the Assistants menu on the instrument

cluster

to the initial state prior to the moment the

trailer was electrically connected.

●

The brightness of the door opening warn-

ing indication cannot be adjusted.

●

 Side Assist

●

The system is not available when driving

If the towing hook is not factory-mounted,

then the lane departure warning, the rear

cross traffic alert and the door opening warn-

ing will have to be deactivated manually

when driving with a trailer.

with a trailer.

●

 Rear cross traffic alert

If the verification box on the instrument panel

or the infotainment system is checked , the

functionality will be automatically activated

when switching on the ignition.

Managing the assist systems

Enabling and disabling the assist systems

When the lane departure warning is ready to

operate, the indications in the control lamps

will turn on briefly as confirmation.

Both the Side Assist and Exit Assist can be

switched on and off by accessing the Assis-

tants menu in the infotainment system.

When the vehicle is restarted, the last adjust-

ment in the system will remain active.

Exit Assist and Rear Cross Traffic Alert (RCTA)

can also be found in the Park Assist Settings

menu.

Trailer mode

Side Assist and the Rear Cross Traffic Alert

(RCTA) can also be switched off and on in the

instrument cluster Assistants menu

The lane departure warning, the rear cross

traffic alert and the door opening warning will

be automatically deactivated and will be

prevented from reactivating if the factory-

mounted tow hook is electrically connected

to a trailer or other similar device.

page 72.

›››

Open the Assistants menu in the infotain-

ment system.

●

As soon as the driver starts to drive with a

trailer connected electrically to the vehicle, a

message will appear on the instrument panel

display indicating that the lane departure

warning, the rear cross traffic alert and the

door opening warning are deactivated. Once

the vehicle trailer has been disengaged, the

lane departure warning, the rear cross traffic

alert and the door opening warning will return

 Side Assist

●

 Door opening warning

 Rear cross traffic alert

Open the Park Assist > Settings menu in the

infotainment system.

●

 Door opening warning

 Rear cross traffic alert

●

269

Driving -> Lane departure warning (Side Assist) with rear cross traffic alert (RCTA) and door opening warning (Exit Assist) for Your Seat Leon 4 Door Fourth Generation (2021-2026)

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