When the high beams are activated, Adaptive Highbeam Assist always provides the optimum headlamp range and prevents dazzling oncoming traffic. The driver hardly has to operate the high-beam switch any longer and is able to better focus on the driving tasks.

Only available in conjunction with the optional Intelligent Light System.

The flashing brake lights can help in an emergency situation to significantly shorten the reaction time of road users following behind. The adaptive brake lights thus make an important contribution to preventing rear-end collisions.

They are activated if the initial speed is greater than 50 km/h and Brake Assist BAS has recognised an emergency braking situation; or the brake pressure is more than 75 percent of the maximum. In addition, the hazard warning lights are activated when the vehicle comes to a standstill if the speed prior to braking exceeded 70 km/h.

Active Parking Assist makes finding a parking space as well as parking and leaving a parallel or on-end parking space easier. It automatically steers the vehicle into parking spaces and spares the driver the steering and braking actions.

Active Parking Assist is automatically engaged when driving forwards at speeds up to 35 km/h. If the vehicle travels slower than 30 km/h, the system indicates with a "P" symbol and a directional arrow in the multifunction display of the instrument cluster that it has located a suitable parking space. By default the system looks on the right side of the road, when the left-side turn indicator is activated also on the left side of the road.

If the driver changes into reverse gear, confirms the parking selection shown and drives no faster than 10 km/h, the active Parking Assist carries out the steering manoeuvre on its own. The driver can at any time intervene and correct the parking manoeuvre.

The electronic parking aid PARKTRONIC monitors the front and rear of the vehicle during manoeuvring and warns the driver when it detects a potential collision. It is active at a speed of up to 18 km/h.

In particular on long trips and when driving at night this system can increase driving safety. Based on the driver's actions ATTENTION ASSIST recognises typical signs of fatigue and severe inattentiveness and issues visual and audible warnings of impending microsleep.

At speeds between 80 and 180 km/h ATTENTION ASSIST permanently analyses driver behaviour and steering input. If the system detects certain steering patterns that frequently accompany drowsiness, it warns the driver visually by displaying the "coffee cup" symbol in the instrument cluster at the same time as emitting audible signals.

The high light output of the bi-xenon headlamps with headlamp washer system improves visibility in the dark decisively. Dynamic headlamp range control results in considerably improved illumination of the roadway without dazzling oncoming traffic.

The bi-xenon headlamps use xenon technology for the dipped and high beams. As a result the dipped beams provide better illumination of the edges of the roadway while the high beams provide a significantly increased headlamp range.

Furthermore, the bi-xenon headlamps have a longer service life than conventional headlamps. LEDs are used in the indicators that are integrated into the bi-xenon headlamps as well as in the rear lamp unit (brake lamp, indicator, reversing light, rear fog lamp). The daytime driving lamps, parking lights and side lights use fibre optic technology.

Part of the optional Intelligent Light System;standard equipment for the GLA 45 AMG 4MATIC.

The braking system increases driving comfort and safety. On one hand it helps to perform critical braking manoeuvres with the basic function of the ABS anti-lock braking system while convenience functions make coping with daily driving situations easier on the other.

It prevents unintentional rolling of the vehicle on inclines when switching from the brake pedal to the accelerator pedal. The "pre-fill" function ensures that the brake pads are already put in contact with the brake discs as soon as the driver releases the accelerator pedal. The resulting time saving can shorten the stopping distance.

In the wet the "brake drying" function automatically removes the film of water from the brake discs to shorten the brake response time. The HOLD function lets you keep the vehicle stationary without having to keep your foot on the brake pedal.

COLLISION PREVENTION ASSIST warns the driver visually and audibly of insufficient distance to the vehicle travelling ahead or of stationary objects. Adaptive Brake Assist helps the driver to brake to prevent rear-ending the vehicle travelling ahead.

When travelling at speeds of more than 7 km/h, the system can recognise insufficient gaps to vehicles ahead. When the system detects the danger of a rear-end collision, it can emit a visual and acoustic warning to the driver.

If the system detects a danger and the driver applies the brakes at the same time, Adaptive Brake Assist can intervene for good measure: It then provides precisely the right amount of brake pressure that is needed ideally to avoid an impending collision.

The innovative driver assistance system automatically helps drivers to keep a safe distance from the vehicle in front and unburdens them on long journeys and in stop-and-go traffic. COLLISION PREVENTION ASSIST PLUS warns of falling below the safe following distance visually and audibly.

In stop-and-go traffic, DISTRONIC PLUS applies the brakes automatically – if necessary, until the vehicle comes to a complete stop. Automatic braking is applied with a deceleration of up to 5 m/s2 As soon as the traffic situation improves, DISTRONIC PLUS automatically accelerates back up to the preset speed if the driver presses briefly on the accelerator or flicks the cruise control lever.

If DISTRONIC PLUS identifies that heavy braking is required, an intermittent warning tone is sounded and a warning symbol lights up in the instrument panel. This alerts the driver to pay close attention and apply the brakes if necessary. To move off again after coming to a complete stop, the driver only needs to pull the cruise control lever or tap the accelerator.

DISTRONIC PLUS combined with COLLISION PREVENTION ASSIST gives COLLISION PREVENTION ASSIST PLUS. It has an additional function. If there is a lasting danger of a collision and the driver fails to react, the system can also execute autonomous braking at speeds of up to 200 km/h, thereby reducing impact of an accident with a vehicle ahead that is slower or is coming to a stop.

Only available in conjunction with 7G-DCT automatic transmission.

In critical handling situations the Electronic Stability Program ESP® can keep the vehicle from skidding. With targeted brake interventions on individual wheels ESP® reduces oversteer or understeer tendencies and thus increases handling safety.

In addition, the engine output is adjusted as needed. A yaw-rate sensor continuously monitors vehicle movement around its vertical axis and ESP® compares the actual values measured with the target value, which is based on the driver's steering input and the vehicle speed.

The instant the vehicle deviates from this ideal line, ESP® intervenes by working to counteract any swerving movements as they occur. This way, ESP® helps the driver to stabilise the vehicle within the laws of physics – particularly when cornering and during sudden evasive manoeuvres.

Not available for the GLA 45 AMG 4MATIC.

For the best possible visibility on country roads and motorways, on bends and in foggy conditions, the Intelligent Light System with adaptive bi-xenon headlamps automatically adapts to the weather, lighting and driving conditions
.

The components and functions of the Intelligent Light System at a glance:

Reverse parking and manoeuvring is considerably easier and safer using the rear-view camera. It automatically switches on when reverse gear is engaged and shows the driver the surroundings behind the vehicle with dynamic guidelines on the CENTRAL MEDIA DISPLAY.

The wheel electronics on the tyre valves on the four wheels measure the tyre pressure and temperature in the initial state and in changing conditions. These data are registered by an aerial in each wheel arch and transmitted to the control unit. Information on tyre pressure is displayed in the multifunction display of the instrument cluster.

Inattention and fatigue can result in you drifting out of your lane without realising it. The system can recognise inadvertent lane departures and can warn the driver with pulsating steering-wheel vibrations.

Cruise control with SPEEDTRONIC allows relaxed and fuel-saving driving especially on long journeys. In addition to the desired cruising speed the system also allow setting an individual top speed, for example, to safely comply with speed limits.

Optional extra in conjunction with 6-speed manual gearbox.

The system visualizes one of the major hazards in traffic. If a vehicle is detected in the blind spot, a red triangle appears in the exterior mirror. Should the driver fail to notice the visual clue and activate the turn indicator, the system issues an additional audible warning.

The driver assistance system is capable of identifying speed limits and no-passing zones as well as the their cancellation and display them in the instrument cluster and in the map view of the CENTRAL MEDIA DISPLAY.

In particular during emergency braking the anti-locking braking system (ABS) provides more driving safety by preventing the wheels from locking. This assists the driver in maintaining control of the vehicle, for instance during evasive manoeuvres or when braking on a slippery road.

To do this, sensors permanently monitor the rotation speed of each wheel. Before a wheel is on the verge of locking up, the braking pressure is lowered. When the danger of locking has been averted, the pressure is increased again.

Moving off or accelerating on snow, wet roads or lose ground – under these circumstances ASR acceleration skid control reduces wheel slip to prevent the vehicle from skidding.

For this purpose sensors measure the rotational speed of the wheels. If a sudden increase in rotational speed (slip) at one of the driven wheels is detected, ASR intervenes in the engine management, adjusts engine output and applies the brakes to stop the wheel from spinning.

The system can recognise an emergency stop by the driver and increases the brake pressure within fractions of a second to shorten the stopping distance. To do so, Brake Assist interprets the speed at which the brake pedal is depressed.

The system is able to identify critical handling situations in advance and initiate preventive measures for occupant protection in the event of an impending accident. These include e.g. the reversible belt tensioning or the automatic closing of any open windows.

it systematically accesses the sensors of existing systems such as ESP® or BAS. Their sensors are able to detect typical critical driving situations and provide the appropriate information to the PRE-SAFE® system, thereby complementing the standard safety systems.

Examples include the securing of the driver and front passenger in their seats at an early stage by electric belt tensioners to prevent undesirable body movements; or the almost complete closure of the side windows and sliding sunroof to protect occupants from any objects entering the vehicle.

After an accident has been avoided and the vehicle has returned to an even and controlled state the reversible protective measures are cancelled. The safety belts are slackened and the other adjusted systems can be returned to the desired position by the occupants.

In a collision the airbags help to protect the upper torso and head of driver and front passenger. They also help to stabilise the whole body. This can mitigate the risk of severe injuries in an accident. The deployment of the airbags is commensurate to the severity of the impact.

The bonnet is raised up in a frontal collision with a pedestrian or cyclist. The increased clearance between the bonnet and the components in the engine compartment creates additional deformation space to absorb an impact sooner and thus mitigate the risk of injury.

not available for the GLA 45 AMG 4MATIC.

The system allows simple, fast and safe attachment of ISOFIX child seats for optimal protection of the child in an accident. TopTether anchoring points offer added safety by anchoring the child seat behind the head restraints.

The knee airbag on the driver’s side helps to protect the legs in a collision and also stabilises the entire body. It can thus help mitigate the potential severity of injuries sustained in an accident.

In a side-on collision the side airbags help to protect the upper torso and pelvic area of driver and front passenger. They also help to stabilise the whole body. This can mitigate the risk of severe injuries in an accident.

They are triggered when the central control unit and the side satellite sensors register acceleration or deceleration forces acting on the vehicle in excess of a certain threshold. The sidebags deploy at chest height between the vehicle side and the occupant.

In a side-on collision the window airbag covers the side windows and can help reduce the risk of the head impacting the sides of the vehicle or intruding objects. It protects the driver, front passenger and passengers on the outer rear seats.