Get Driver assist systems -> Adaptive Cruise Control (ACC) Guide for Volkswagen E Golf 4 Door Second Generation (2017-2020)

Adaptive Cruise Control (ACC)

Introduction to the topic

The Adaptive Cruise Control (ACC) maintains a constant speed that you have set. If the vehicle

approaches a vehicle in front, the ACC automatically adapts the speed so that a distance you

have selected is maintained.

Driving with ACC

You can override regulation by the ACC system at any time. Control will be interrupted if you

brake. If you accelerate, control will be interrupted while you are accelerating and then resumed.

Does the vehicle have ACC?

The vehicle is equipped with ACC if you can adjust the settings for the ACC system in the vehicle

settings in the Infotainment system (→ Vehicle settings menu, Operation).

If the vehicle has ACC, then the cruise control system is not available as an independent system.

Brake request

If automatic deceleration by the ACC system is not sufficient, the ACC system 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

The ACC system detects driving situations by means of the radar sensor at the front of the

vehicle . The range of the radar sensor is up to approximately 120 m.

WARNING

The intelligent technology used in the ACC system cannot overcome the physical limits

specified 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 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 the 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 does 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. 1 On the instrument cluster display: slower vehicle detected in the left-hand lane

(illustration).

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 the 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 the vehicle to a standstill and hold it stationary. The ACC remains active and the

instrument cluster display shows

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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).

Extending or reactivating readiness to move off:

—Press the

button.

Moving off when readiness to move off has ended and the vehicle in front has already moved

away:

—Press the

button or briefly press the accelerator.

The ACC remains inactive in the following cases:

—The vehicle is stationary for longer than approximately three minutes.

—A vehicle door is opened.

—The ignition is switched off.

Inside Overtaking Prevention System

If the ACC detects a slower vehicle in the left-hand lane (left-hand traffic: in the right-hand lane),

the ACC will brake the vehicle gently within the system limits and therefore prevent a prohibited

overtaking manoeuvre → Fig. 1 . The function is active from speeds of around 80 km/h (50 mph),

but is not available in all countries.

WARNING

If the message

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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 the ACC

Fig. 1

Driving through bends.

Vehicles outside the range of the radar sensor.

Fig. 2

Vehicle changes lane.

Turning and stationary vehicle.

When not to use the ACC

Due to the system limitations, the ACC is not suitable for use in the following driving situations.

Interrupting control (→ ACC, Introduction/General information):

—Driving in heavy rain, snow or heavy spray.

—Driving through tunnels.

—Driving through road works.

—Driving on winding 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 System: On roads with more than one lane, if

other vehicles are driving more slowly in the overtaking lane.

Delayed response

If the radar sensor is exposed to environmental conditions that impair sensor functioning, the

system may detect this only after a certain delay. For this reason, any restrictions to functions

may be displayed only after a delay at the start of the journey and when driving (→ ACC,

Introduction/General information).

Objects that cannot be detected

The radar sensor detects only vehicles that are moving in the same direction. It does not detect:

—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. 2

.

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. 1

.

Vehicles outside the sensor range

The ACC may not react or may react with a delay or with an unwanted response in the following

driving situations:

—Vehicles that are driving outside the sensor range in close proximity to your vehicle, e.g.

motorbikes → Fig. 1

.

—Vehicles that change into your lane directly in front of your vehicle → Fig. 2

—Vehicles with bodies or attachments that project beyond the vehicle.

.

WARNING

If you use the ACC in the above situations, this could result in accidents and serious injuries as

well as violations of legal regulations.

Switching the ACC on and off

Fig. 1 Left-hand side of the multifunction steering wheel: buttons for operating the ACC.

Switching on

—Press the

button.

Indicator lamp lights up grey, ACC does not regulate.

Starting control

—Press the

button while driving forwards.

The ACC stores the current speed and maintains the set distance. If the current speed is outside

the defined speed range, the ACC will set the minimum speed (when driving more slowly than

the limit) or maximum speed (when driving faster than the limit).

The following indicator lamps light up, depending on the driving situation:

ACC regulating.

No vehicle has been detected ahead.

Vehicle detected ahead (white).

Interrupting control

—Briefly press the

button or depress the brake pedal.

The corresponding indicator lamp

lights up grey, the speed and distance remain stored.

Control is automatically interrupted if the traction control system (TCS) is deactivated.

Resuming control

—Press the

button.

ACC adopts the last set speed and last set distance. The instrument cluster display shows the set

speed and the indicator lamp corresponding to the driving situation lights up.

Switching off

—Press and hold the

button.

The set speed is deleted.

Changing to the speed limiter

—Press the

button.

—Select the speed limiter on the instrument cluster display.

The ACC is switched off.

Setting the ACC

Fig. 1 On the instrument cluster display: setting the distance (illustration, the ACC is active).

Setting the distance

You can set the distance in 5 steps from very small to very large:

—Press the

button and then the or button.

button as often as necessary until the desired distance is set.

—Alternatively, press the

The instrument cluster display shows the chosen distance setting → Fig. 1 1 . Please observe

any country-specific requirements for the minimum distance.

You can set the distance which should be set at the start of control operation in the vehicle

settings of the Infotainment system (→ Vehicle settings menu, Operation).

If the ACC is not active, the set distance and vehicle are not highlighted on the instrument cluster

display.

Setting the speed

You can adjust the stored speed within the defined speed range by means of the buttons on the

multifunction steering wheel:

+ 1 km/h (1 mph)

- 1 km/h (1 mph)

+ 10 km/h (5 mph)

- 10 km/h (5 mph)

Press and hold the corresponding button to continuously change the stored speed.

Setting the system behaviour

You can influence how sportily ACC reacts:

—Vehicles with driving mode selection: Set preferred driving mode (→ Driving profile selection,

Description).

—Vehicles without driving mode selection: Select your preferred driving programme in the

vehicle settings menu of the Infotainment system (→ Vehicle settings menu, Operation).

WARNING

If you do not maintain the minimum distance to the 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.

●

The Adaptive Cruise Control 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. The 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,

Description).

Troubleshooting

The ACC is not available.

The indicator lamp lights up yellow.

—The radar sensor is dirty. Clean the radar sensor (→ Vehicle care, Description).

—The view 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, Description).

—The view 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,

Standards/Directives).

—Fault or malfunction. Ending and re-establishing the electric drive .

—Structural modifications have been made to the front of the vehicle.

—If the problem persists, go to a qualified workshop.

The ACC does not function as expected.

—The radar sensor is dirty. Clean the radar sensor (→ Vehicle care, Description).

—The system limits have been exceeded (→ ACC, Limits/System limits).

—The brakes have overheated, control was interrupted automatically. Allow the brakes to cool

down and check their functionality again.

—If the problem persists, go to a qualified workshop.

Control cannot be started.

Make sure that the following conditions are met:

—The selector lever is in position D/B.

—The brake lights on the vehicle are working.

—ESC is not active.

—The brake pedal is not depressed.

Unusual noises during automatic braking.

—This is normal and is not a fault.

Driver assist systems -> Adaptive Cruise Control (ACC) for Your Volkswagen E Golf 4 Door Second Generation (2017-2020)

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