ACC – Adaptive Cruise Control. Adaptive Cruise Control (ACC) uses a sensor to measure the distance to vehicles driving ahead and their relative speed. Using the related buttons on the multifunction steering wheel, the driver sets a desired time value for following distance and desired speed (between 30 and 210 km/h in the T-Roc with manual gearbox, and 0 to 210 km/h with DSG). When following other vehicles, the driver may optionally choose to have a comparison of the target and actual gaps shown on the multifunction display. A sensor constantly monitors the zone in front of the vehicle. The driver can interrupt ACC control and accelerate more vigorously by pressing the accelerator pedal. Use of the brake pedal immediately deactivates the ACC function.
Active Cylinder Management. Active Cylinder Management is a cylinder deactivation system. When travelling within certain engine and driving speed ranges, two of the four cylinders can be deactivated regardless of which gear is selected – a process that is essentially imperceptible to the driver. This optimises the engine's operating efficiency while significantly reducing fuel consumption. The multifunction display indicates which engine mode is currently active.
Active Info Display. Volkswagen is offering fully digital instruments for the T-Roc in the form of the Active Info Display. The high-resolution screen (11.7-inch) makes it possible to adapt instruments to personal needs in various screen views. For instance, in navigation mode the speedometer and rev counter are shifted to the screen borders to provide more space for the map. If desired, information on driving, navigation or assistance functions may be integrated into the graphic display areas of the speedometer and rev counter. Infotainment system data that is displayed on the centre console (e.g. phone contact images or CD covers) can also be shown in the Active Info Display.
App-Connect. Car-Net ‘App-Connect' makes it possible to connect a smartphone to the Composition Media radio system or Discover Media navigation system. This enables users to operate selected mobile phone apps from the touchscreen. App-Connect integrates three interfaces to connect to smartphones: MirrorLink™, Android Auto™ from Google and Apple CarPlay™. This means that it is compatible with all of today's smartphones running Android 5.0 or higher and Apple iOS 8.1 or higher.
ASR – traction control. The traction control system (ASR) offers added convenience and safety, particularly when driving on slippery roads or surfaces with differing degrees of grip. The traction control system facilitates smooth drive-off and acceleration without wheelspin or fishtailing. ASR interacts with the electronic accelerator pedal; it also makes use of the wheel speed sensors of the anti-lock braking system (ABS). If a sudden increase in speed is detected from a wheel (i.e. slip), the system intervenes in the engine controller to counter this effect by throttling back engine power.
Rear Traffic Alert. Rear Traffic Alert enhances safety. It is offered in combination with the Blind Spot Monitor. Rear Traffic Alert takes much of the risk out of reversing from driveways and parking spaces that are at right angles to the road. The innovation here: the system not only ‘recognises' stationary or moving vehicles directly behind the T-Roc, but also vehicles approaching from the side which are barely visible to the driver. The radar-based sensor module even detects objects at distances of up to 40 metres and recognises objects moving at speeds of 4 km/h or faster. If a collision is imminent, the system produces an audible warning. If the driver or other road user does not take action to avert the danger, or if there is a risk of immediate collision, the Rear Traffic Alert system automatically activates the car's brakes.
Blind Spot Monitor – lane change system. The Blind Spot Monitor assists the driver in changing lanes. Two radar systems at the rear of the vehicle scan zones up to approx. 50 metres behind the vehicle as well as the blind spot next to the vehicle. Whether or not the driver is changing lanes, the Blind Spot Monitor shows all vehicles that are located in a critical zone for lane changes. Active from 30 km/h, the system alerts the driver of a potential hazard by activating a constant light in the relevant exterior mirror. If the driver activates the turn indicator despite the warning, the LED on that side begins to flash at a higher light intensity to call the driver's attention to the hazard.
DCC – Adaptive chassis control. Adaptive chassis control (DCC) makes it possible to adjust the running gear to a normal, sporty or comfortable mode. The electrically adjustable damping system adapts automatically to this setting, as does the electromechanical power steering. DCC responds continually to changing driving situations and takes braking, steering and accelerating actions into account.
DSG – dual clutch gearbox. Dual clutch gearboxes (DSG) consist of two independent gearbox units. As they move through the gears, the dual-clutch mechanism enables alternating engagement with the engine via two drive shafts – one for each of the two gearboxes. The dual clutch gearbox enables automatic gear changes without any interruption in power transmission. The gearbox is controlled by a mechatronics module, which houses the electronic transmission control unit, various sensors and hydraulic actuators in a single compact unit.
Emergency Assist. Emergency Assist monitors driver activity – such as use of the accelerator pedal, brakes and steering – and helps, within system limits, to prevent accidents and reduce the potential consequences of an accident if the driver is incapacitated for health reasons. If the driver fails to respond, the system prompts the driver to correct the steering, by means of repeated brake jolts, and it automatically applies the brakes. In this process, ACC monitors the distance to traffic ahead, while Lane Assist ensures that the vehicle stays within its lane. Emergency Assist alerts other road users with the hazard warning lights and with gentle steering movements and safely slows the vehicle down – all the way to a standstill.
4MOTION – all-wheel drive. 4MOTION is Volkswagen's permanent
all-wheel drive system. It distributes the engine's power to all four wheels as the situation demands. In vehicles with transverse-mounted engines, an all-wheel drive coupling is used. 4MOTION offers a high level of active safety, reliable traction and optimal directional stability at all times. 4MOTION operates together with all of the car's dynamic control systems such as ESC, ASR and EDS.
4MOTION Active Control and driving profile selection. All of the all-wheel drive versions of the T-Roc have 4MOTION Active Control with driving profile selection as standard. The system is operated via the 4MOTION Active Control switch on the centre console. The driver uses it to activate four higher-level modes and various pop-up menus. When the rotary switch is turned to the left, one of the two on-road profiles can be activated: ‘Street' and ‘Snow'. When the switch is turned to the right, the two off-road modes are available: ‘Offroad' (automatic setting of off-road parameters) or ‘Offroad Individual' (variable settings). 4MOTION Active Control adapts all relevant assistance systems to the driving situation in just seconds. Driving profile selection is also included as standard in the 4MOTION models. It allows the driver to individually control - depending on the installed standard and optional equipment - parameters for DSG, automatic air conditioning, electromechanical power steering, adaptive chassis control (DCC) and Adaptive Cruise Control (ACC). The driver can choose from the five profiles Comfort, Normal, Sport, Eco and Individual. For models with front-wheel drive, driving profile selection can also be ordered as an option.
Front Assist – area monitoring system. The Front Assist area monitoring system uses sensors (radars/lasers) to detect situations where the distance to the vehicle ahead is critical, and it helps to shorten the vehicle's stopping distance. In dangerous situations the system alerts the driver by visual and audible signals and a jolt of the brakes. Front Assist operates independently of Adaptive Cruise Control (ACC). It also ‘prepares' the brake system for emergency braking. If the driver then applies the brakes, full braking power is available immediately. If the braking is not forceful enough, Front Assist increases the braking pressure to the degree needed. In the T-Roc, Front Assist also offers assistance at low driving speeds via City Emergency Braking System. If the driver does not react, Front Assist automatically and independently initiates automatic partial braking, in order to slow the vehicle down sufficiently and regain the driver's attention. In situations where a collision is unavoidable, the driver is also assisted by automatic hard braking.
Pedestrian monitoring. Pedestrian Monitoring is an extension of Front Assist with City Emergency Braking System. The system utilises two sensors at the front of the vehicle – a radar sensor in the radiator grille and a camera in the base of the interior rear-view mirror – to acquire information on the zone in front of the vehicle. Within system limits it can, for example, detect a pedestrian suddenly stepping out onto the carriageway. This immediately triggers audible and visual signals to warn the driver. If the driver does not brake, a brake jolt provides a warning of the critical distance, and the brake system is simultaneously prepared for possible hard braking. If the driver does not respond, the system automatically initiates emergency braking within system limits.
Lane Assist – lane-keeping system. The lane-keeping system Lane Assist is started from the multifunction display and is then active from a driving speed of 65 km/h. A camera module in the area of the interior mirror acquires lane markings and evaluates the vehicle's position. If the vehicle begins to leave its driving lane, Lane Assist warns the driver – within its system limits and depending on the model – by means of an audible signal, vibrating of the steering wheel or a corrective steering intervention. The signal is always made unobtrusively to avoid annoying the driver. The system does not react if the turn signal was set before driving over a lane line.
Light Assist – main beam control system. Light Assist improves comfort and safety by automatic main beam control. A camera on the rear-view mirror monitors traffic. Light Assist automatically switches the main beam on starting at a driving speed of 60 km/h and in completely dark conditions. The system recognises vehicles driving ahead and oncoming traffic, and it automatically dips the headlights before drivers of those vehicles are dazzled. This automatic switching between the main and dipped beam ensures optimal illumination of the road ahead.
Driver Alert System. The Driver Alert System recommends that the driver take a break whenever necessary. It detects deviations from normal driving behaviour and is helpful on long journeys. The system continually evaluates driving behaviour at speeds from 65 km/h and determines whether the driver is fit to drive. It evaluates various signals such as steering inputs. If it detects driver fatigue, the system gives both visual and audible cues to the driver to take a break.
Automatic Post-Collision Braking System. Around one-quarter of all accidents that result in personal injury involve multiple collisions. Volkswagen's Automatic Post-Collision Braking System can help to avoid secondary collisions or reduce their severity. After an initial collision, the Automatic Post-Collision Braking System automatically initiates a braking action – within system limits – even before the driver can react. This can reduce the severity of the accident and ideally prevent secondary collisions.
Park Assist – park steering assistant including manoeuvre braking. Park Assist automatically guides the T-Roc into parallel or perpendicular parking spaces, and it can also pull out of parallel parking spaces. The system helps the driver by autonomously making optimal steering wheel movements to follow an ideal line when parking in reverse. Park Assist automatically scans the parking space, assigns a starting position and makes the steering movements – the driver only needs to accelerate and brake. The manoeuvre braking also works to reduce parking and manoeuvring collisions when reversing.
Proactive occupant protection system. The proactive occupant protection system uses sensors of the ESC system and the Front Assist area monitoring system to detect critical situations with increased potential of accidents. If the system detects such a situation, the vehicle occupants and the vehicle are prepared for a potential crash. This involves tensioning the seat belts being used in the front to securely hold the driver and front-seat passenger and, but for a small gap, closing any open windows and sunroof.
Progressive steering. Compared to a conventional steering system, progressive steering takes significantly fewer turns of the steering wheel to reach its end stop. The progressive steering ratio reduces steering work when parking, for example. It also leads to optimised, more direct and controlled steering response, which makes everyday driving more comfortable and enhances handling on roads with a lot of bends.
Traffic Jam Assist. Traffic Jam Assist utilises functions like ACC and Lane Assist to enable convenient and safe stop-and-go driving in a traffic jam. In heavy traffic at driving speeds from 0 to 60 km/h, the system responds to other vehicles and autonomously handles steering, accelerating and braking. When traffic comes to a standstill, it also brakes the vehicle to a stop and can drive off again within a predefined time interval. In contrast to pure Adaptive Cruise Control (ACC), Traffic Jam Assist uses a camera behind the windscreen to detect lane markings. This enables the vehicle to be kept in the lane via Lane Assist.
XDS – electronic differential lock. The electronic differential lock (XDS) is an extension of the familiar EDL function. However, XDS does not respond to loss of traction, but instead to any loss of load on the front wheel on the inside of a bend during fast cornering. XDS applies pressure to the wheel on the inside of the bend using the ESC hydraulics to prevent it from spinning. This improves traction and reduces the tendency to understeer. The hydraulic pressure applied ranges from approximately 5 to 15 bar. The impression when driving is similar to that of a differential lock in a toned-down form. The precise build-up of brake pressure on one side of the vehicle makes cornering even sportier, quicker and more accurate.