sensor VOLKSWAGEN T-ROC 2021 Owner´s Manual

Before setting off and before switching on the ignition, always check the following to avoid damage
to the windscreen, the wiper blades and the wiper motor:
The wiper lever is located in the basic position.
Snow and ice have been removed from the wiper blades and door windows.
Wiper blades that have become frozen onto the glass have been carefully loosened. Volkswagen
recommends using a de-icer spray for this.

NOTICE
Do not switch on the wipers when the window is dry. Using the wipers when the window is dry can
damage the glass.

When switched on, the wipers will temporarily be switched to the next setting down when the
vehicle is stationary.

When parking the vehicle in cold weather, it may be helpful to leave the front windscreen wipers in
the service position to make it easier to loosen the wiper blades ⇒ Wiper blades .
Wiper function
Automatic activation of the rear window wiper
The rear window wiper is switched on automatically if the windscreen wipers are switched on and
reverse gear is engaged. Automatic switch-on when reverse gear is selected can be activated and
deactivated in the Infotainment system in the Vehicle settings menu ⇒ Infotainment system controls
and displays .
Heated washer jets
The heating defrosts frozen washer jets. The heating output is automatically regulated depending on
the ambient temperature when the ignition is switched on. Only the jets are heated, not the hoses
that the washer fluid flows through.
Rain/light sensor

Fig. 85 On the right of the steering column: wiper lever.

When the rain/light sensor is activated, it automatically controls the frequency of the wiper intervals
depending on the intensity of the rain.
Activating and deactivating the rain/light sensor
Position Ⓐ - the rain/light sensor is deactivated.
Position Ⓑ - the rain/light sensor is activated, automatic wipe when necessary.
The automatic wipe function can be activated and deactivated in the Infotainment system in
the Vehicle settings menu ⇒ Infotainment system controls and displays .
If the automatic wipe function is deactivated in the Infotainment system, the intervals are set at
fixed levels.
Adjusting the sensitivity of the rain/light sensor
The sensitivity of the rain/light sensor can be adjusted manually using the switch in the wiper lever
⇒ Fig. 85  ① ⇒ .
Switch to the right – high sensitivity.
Switch to the left – low sensitivity.

WARNING
The rain/light sensor cannot always adequately detect all precipitation and activate the wipers
correspondingly.
If necessary, switch on the wipers manually in good time if the water on the windscreen restricts the
field of vision.

Some settings can be stored in the user accounts of the personalisation function and therefore
change automatically when the user account changes ⇒ Personalisation .
Troubleshooting
Washer fluid level too low
The indicator lamp lights up yellow.
Fill up the washer fluid reservoir at the next opportunity ⇒ Washer fluid 
Fault in rain/light sensor
The wipers are not switched on automatically if it rains during rain/light sensor operation.
The indicator lamp lights up yellow.
Switch the ignition off and on.
If the problem persists, go to a qualified workshop.

Fault in wipers
The wipers do not wipe.
The indicator lamp lights up yellow.
Switch the ignition off and on.
If the problem persists, go to a qualified workshop.
Changes in the activation behaviour of the rain/light sensor
Possible causes for faults and misinterpretations relating to the sensitive surface of the rain/light
sensor ⇒ Vehicle overviews  include:
Damaged wiper blades: a film of water or smears caused by damaged wiper blades can increase the
time the wipers are switched on, can shorten the length of the intervals between wipes or cause the
wipers to run quickly and continuously.
Insects: insects hitting the windscreen can cause the wipers to be activated.
Salt deposits: in winter, salt deposits can cause the wipers to continue to wipe the windscreen when
it is almost dry.
Dirt: dry dust, wax, windscreen coatings (lotus effect), or detergent deposits (from an automatic car
wash) can cause the rain/light sensor to become less sensitive and react too slowly, or prevent it
from reacting at all. Clean the sensitive surface of the rain/light sensor ⇒ Caring for and cleaning the
vehicle exterior  at regular intervals and inspect the wiper blades for damage.
Crack in the windscreen: a wipe cycle will be triggered if the rain/light sensor is on when the
windscreen is impacted by a stone. The rain/light sensor will then register the impairment of the
sensitive surfaces and adjust accordingly. Depending on the size of the stone impact, the activation
behaviour of the rain/light sensor may be changed.
We recommend that you use an alcohol-based glass cleaner to remove wax and polish.

The wipers will try to wipe away any obstacles that are on the window. The wiper will stop moving if
the obstacle continues to block its path. Remove the obstacle and switch the wiper back on again.
Mirrors
Introduction
This chapter contains information on the followingsubjects:
⇒ Interior mirror 
⇒ Exterior mirrors 
You can use the exterior mirrors and the interior mirror to observe traffic behind you and adjust
your driving style accordingly.

Automatic anti-dazzle interior mirror
When the ignition is switched on, the sensors measure the incident light from the rear ⇒ Fig. 86  ①
and from the front ②.
Depending on the values measured, the interior mirror dips automatically.
If the incident light on the sensors is hindered or interrupted, e.g. by a sun blind or other hanging
objects, the automatic anti-dazzle interior mirror will not function or will not function correctly.
Mobile navigation systems fitted to the windscreen or near the interior automatic anti-dazzle
interior mirror can also affect the sensors ⇒ .
The automatic anti-dazzle function will be deactivated in some situations, e.g. when reverse gear is
engaged.
Manual anti-dazzle interior mirror
Basic position: the lever on the lower part of the mirror is pointing towards the windscreen.
Pull the lever to the back to use the anti-dazzle function ⇒ Fig. 87 .

WARNING
The illuminated display from a mobile navigation device can lead to malfunctions of the interior
automatic anti-dazzle mirror and cause accidents or serious injuries.
You may not be able to precisely determine the distance from vehicles travelling behind you or from
other objects if the automatic anti-dazzle function malfunctions.
Exterior mirrors

Fig. 88 In the driver door: rotary knob for the exterior mirrors.
First read and observe the introductoryinformation and safety warnings⇒Introduction 
Switch on the ignition.
Turn the rotary knob in the driver door to the desired symbol ⇒ Fig. 88 .

The downhill speed control cannot hold the vehicle on the gradient in all situations or brake it
sufficiently on all slopes going downhill (e.g. if the ground is slippery or icy).

WARNING
Always be prepared to brake the vehicle. Accidents and injuries could occur if you are not prepared
to brake.
The downhill speed control is only a support function and may not be able to brake the vehicle
sufficiently in all situations when driving downhill.
The vehicle may become faster despite the downhill speed control being in operation.
Steering
Information on steering
The steering should be locked every time you leave the vehicle to make it more difficult for the
vehicle to be stolen.
The steering
The power steering is not hydraulic, but is an electromechanical system. The advantage of this
steering system is that no hydraulic hoses, hydraulic oil, pumps, filter or other parts are required.
The electromechanical system reduces fuel consumption. A hydraulic system requires constant oil
pressure in the system, whereas an electromechanical steering system only needs an energy supply
while steering.
In vehicles with driving profile selection, the selected driving profile can affect the behaviour of the
power steering ⇒ Driving profile selection and 4MOTION Active Control .
Electronic steering column lock in vehicles with a starter button
The steering column will be locked if the driver door is opened when the ignition is switched off. For
this, the vehicle should be stationary and, if necessary, the gear selector lever should be in position
P.
If the ignition is not switched off until after the driver door is opened, the electronic steering column
will only be locked when the vehicle is locked using the sensor in the door handle or the vehicle key.
Mechanical steering column lock (steering lock) in vehicles with an ignition lock
The steering column is locked if the vehicle key is removed from the ignition lock when the vehicle is
stationary. Turn the steering wheel slightly until the steering lock audibly engages.
Insert the vehicle key into the ignition lock to unlock the steering lock. Turn the steering wheel
slightly to relieve the load on the steering lock mechanism. Hold the steering wheel in this position
and turn the ignition on.
Electromechanical steering

If automatic deceleration by ACC is not sufficient, ACC will request you to brake additionally by a
corresponding message on the instrument cluster. In addition, the red warning lamp lights up
and an acoustic warning is given. Brake immediately!
Radar sensor
ACC detects driving situations by means of the radar sensor at the front of the vehicle ⇒ Front view .
The radar sensor has a range of up to approximately 120 m.

WARNING
The intelligent technology used in the ACC cannot overcome the laws of physics, and functions only
within the limits of the system. Never let the extra convenience tempt you into taking safety risks
when driving. Careless or unintentional use of the Adaptive Cruise Control (ACC) can cause accidents
and lead to serious injury. The system is not a substitute for the full concentration of the driver.
Adapt your speed and distance from the vehicles ahead to suit visibility, weather, road and traffic
conditions.
Never use the ACC in poor visibility, on steep or winding roads, or on slippery road surfaces e.g. due
to snow, ice, wet roads, loose chippings, or on flooded roads.
Never use the ACC offroad or on non-surfaced roads. The ACC is designed for use on surfaced roads
only.
The ACC will not react to stationary vehicles.
The ACC will not react to persons, animals or vehicles crossing or approaching in the same lane.
Brake immediately if speed reduction by ACC is not sufficient.
Brake immediately if a request to brake appears on the instrument cluster display.
Brake if the vehicle starts rolling unintentionally after a request to brake.
Be prepared to control the speed yourself at all times.
Special driving situations

Fig. 118 On the instrument cluster display: slower vehicle detected in the left-hand lane (illustration).

First read and observe the introductoryinformation and safety warnings⇒Introduction 
Overtaking
If you indicate left (left-hand traffic: indicate right) to overtake, ACC will accelerate the vehicle and
reduce the distance from the vehicle in front. Your set speed will not be exceeded.
If ACC does not detect any vehicle in front after you have changed lane, ACC will accelerate the
vehicle up to the set speed.
Stop-and-go traffic
ACC can brake vehicles with DSG® dual clutch gearbox to a standstill and hold them stationary. ACC
remains active and the instrument cluster display shows ACC ready for a few seconds. During this
time the vehicle will move off again automatically as soon as the vehicle in front moves off
(depending on the vehicle equipment level and not available in all countries).
Press the button.
Press the button or briefly press the accelerator.
The vehicle is stationary for longer than approximately three minutes.
A vehicle door is opened.
The ignition is switched off.
Avoiding overtaking on the right (left-hand traffic: overtaking on the left)
If ACC detects a slower vehicle in the left-hand lane (left-hand traffic: in the right-hand lane), ACC
will brake the vehicle gently within the system limits and therefore prevent a prohibited overtaking
manoeuvre ⇒ Fig. 118 . The function is active from speeds of around 80 km/h (50 mph), but is not
available in all countries.

WARNING
If the message ACC ready is shown on the instrument cluster display and the vehicle in front moves
off, your vehicle will move off automatically. In some cases the radar sensor may be unable to detect
obstacles that are located in the vehicle's path. This can result in serious injury and accidents.
Always check the road ahead before moving off and brake the vehicle if necessary.
Limits of ACC

Fig. 119 Driving through bends. Vehicles outside the range of the radar sensor.

Fig. 120 Vehicle changes lane. Turning vehicle and stationary vehicle.
First read and observe the introductoryinformation and safety warnings⇒Introduction 
When not to use ACC
Driving in heavy rain, snow or heavy spray.
Driving through tunnels.
Driving through road works.
Driving on twisting roads, e.g. mountain roads.
Driving offroad.
Driving in multi-storey car parks.
Driving on roads with embedded metal objects, e.g. railway tracks.
Driving on roads with loose chippings.
Vehicles without inside overtaking prevention function: driving on multi-lane roads when
vehicles in the overtaking lane are driving more slowly.
Delayed response

If the radar sensor is exposed to environmental conditions that impair sensor functioning, the
system may detect this only after a certain time. For this reason, possible functional restrictions may
be displayed only after a delay at the start of the journey and when driving ⇒ .
Objects that cannot be detected
Persons.
Animals.
Stationary vehicles.
Crossing or oncoming vehicles.
Other stationary obstacles.
If a stationary vehicle is hidden behind a vehicle that has been detected by the adaptive cruise
control and this vehicle turns off the road or changes lane, the ACC will not react to the stationary
vehicle ⇒ Fig. 120  .
Bends
The radar sensor always measures straight ahead. For this reason, vehicles may be incorrectly
detected or vehicles driving ahead not detected in tight bends ⇒ Fig. 119  .
Vehicles outside the sensor range
Vehicles that are driving outside the sensor range in close proximity to your vehicle, e.g. motorbikes
⇒ Fig. 119  .
Vehicles that change into your lane directly in front of your vehicle ⇒ Fig. 120  .
Vehicles with bodies or attachments that project beyond the vehicle.

WARNING
If you use ACC in the above situations, this can result in accidents and serious injuries as well as
violation of legal regulations.
Switching ACC on and off

WARNING
If you do not maintain the minimum distance to a vehicle in front and the difference in speed
between the vehicle in front and your own vehicle is so great that the braking action of the ACC is
insufficient, you are in danger of colliding with the vehicle in front. The braking distance is also
longer in rain and winter road conditions.
ACC may not be able to detect all driving situations correctly.
Always be prepared to brake the vehicle yourself.
Speed and distance control are overridden when you press the accelerator. ACC does not brake
automatically in this case.
Observe any country-specific regulations relating to the minimum distance.
Always set a larger distance in wet or snowy conditions or when visibility is poor.

Some settings can be stored in the user accounts of the personalisation function and therefore
change automatically when the user account changes ⇒ Personalisation .
Troubleshooting
First read and observe the introductoryinformation and safety warnings⇒Introduction 
ACC not available.
The indicator lamp lights up yellow.
The radar sensor is dirty. Clean the radar sensor ⇒ Vehicle care .
The visibility of the radar sensor is impaired due to the weather conditions, e.g. snow, or due to
detergent deposits or coatings. Clean the radar sensor ⇒ Vehicle care .
The visibility of the radar sensor is impaired by add-on parts, the trim frames of number plate
holders or stickers. Keep the area around the radar sensor free.
The radar sensor has been displaced or damaged, e.g. due to damage to the front of the vehicle.
Check whether damage is visible ⇒ Repairs and technical modifications .
Fault or malfunction. Switch off and restart the engine.
Structural modifications have been made to the front of the vehicle.
The genuine Volkswagen badge is not used.
If the problem persists, go to a qualified workshop.
ACC does not function as expected.
The radar sensor is dirty. Clean the radar sensor ⇒ Vehicle care .
The system limits are not met ⇒ Limits of ACC .