Driver support

Warnings from various driver support systems

Updated 5/28/2021

Warnings from various driver support systems

If you notice that the car acts in an unexpected way then this may be due to one of the car's safety-related functions being activated.

What is happening in your car?

There are several functions in your car that can contribute actively to increasing safety in traffic, both for yourself and other road users. You have the option of viewing a list of some of the functions and what they may do – the aim of this is to ensure you are not surprised by the activation of any of the functions. If a function should be activated, you can also be informed of this via a text message in the driver display.


Read the individual sections on each system in order to fully understand the functions and learn about important warnings.

Warning with the symbol, acoustic signals, visual signals or vibration

The driver support functions in your car can alert you in different ways. For example, with vibration in the steering wheel, brake pulse, with visual or acoustic signals or via symbols in the driver display.

City Safety

P5-1846-City Safety symbol

City Safety is a function that can prevent or mitigate a collision with pedestrians, cyclists, larger animals or vehicles. Visual, acoustic and brake pulse warnings are given in the event of a risk of collision to help the driver act in time. If the driver does not react to the warning and the risk of collision is assessed as imminent then City Safety can automatically brake the car.

  • Brake pulse warnings, visual and acoustic signals.
  • The car brakes in certain situations if the driver does not react him/herself within a reasonable amount of time.

Steering assistance at risk of collision

P5-1717 - Lane Keeping Aid, steering assistance in the event of a collision, On/Off button

The function for collision avoidance assistance can help you reduce the risk of the car unintentionally leaving its lane and/or colliding with another vehicle or obstacle. The function can assist you by helping to steer the car back into its own lane and/or steer aside.

Your experience of the function may therefore differ depending on which of the subfunctions is activated.

  • Steering assistance upon risk of run-off.
  • Steering assistance upon risk of head-on collision.
  • Steering assistance upon risk of rear-end collision.

Lane Keeping Aid (LKALane Keeping Aid)

P5-1846-Lane Keeping Aid symbol

Lane assistance can help you to reduce the risk of the car unintentionally leaving its own lane. Since you have the option to choose the setting for how the function should assist you, your experience of the safety function may vary.

  • Steering assistance: If the function detects that the car is approaching a lane line, you will feel a gentle steering action applied to the steering wheel. You must have both hands on the steering wheel for the function to work.
  • Warning: If the function detects that the car is approaching a lane line, you will be alerted by vibration in the steering wheel.
  • Both: You are alerted with vibration and a gentle steering action applied to the steering wheel.

Blind Spot Information (BLIS)

P5-1846-BLIS symbol

BLIS is designed to give a warning of rapidly approaching vehicles as well as vehicles diagonally behind and to the side of your vehicle so as to give you assistance in heavy traffic on roads with several lanes in the same direction.

P5-1846-BLIS indication lamp
  • Alerts with an indicator lamp in the side mirror, with fixed glow and flashing light.

Driver Alert Control (DAC)

P5-1507-Driver Alert Control, time to take a brake symbol

The function is intended to attract the driver's attention if he/she starts to drive less consistently, e.g. if he/she becomes distracted or starts to fall asleep.

  • Acoustic signal combined with a symbol in the driver display and a message.

Cross Traffic Alert (CTA)*

P5-1846-Cross Traffic Alert symbol

Cross Traffic Alert is a function designed to alert for crossing traffic when the car is being reversed.

  • Acoustic signal from left or right-hand speaker, depending on the direction from which the object is approaching
  • Icon in the driver display
  • Icon in the park assist camera's top view

Roll Stability Control (RSC)

P5-1507-Symbol-ESC 19x19

Roll Stability Control is a stabiliser system that, in certain situations, can help to reduce the risk of overturning, for example, during sudden evasive manoeuvres or if the car skids. If the system registers that there is a risk of the car overturning, it can react with the following action:

  • Engine torque is reduced.
  • One or more wheels are braked.


The functions described are supplementary aids - they cannot handle all situations in all conditions.

The driver always bears responsibility that the vehicle is driven safely and that applicable road traffic rules and regulations are followed.

Did this help?