Strong sunlight, reflections, extreme light contrasts, the use of sunglasses, or if the driver is not looking straight ahead may make the visual warning signal in the windshield difficult to see. For this reason, always activate the audible warning signal.

Slippery driving conditions increase braking distance, which can reduce the system's capacity to avoid a collision. In these conditions, the ABS and DSTC systems provide the best possible braking effect while helping to maintain stability.

NOTE

The visual warning signal may be temporarily disengaged in the event of high passenger compartment temperature due to strong sunlight, etc. If this occurs, the audible warning signal will be used, even if it has been deactivated in the menu system.

WARNING

• In certain situations, the system cannot provide warnings or warnings may be delayed if traffic conditions or other external factors make it impossible for the radar sensor or camera to detect a pedestrian or a vehicle ahead.
• Warnings may not be provided if the distance to the vehicle ahead is short, or if movements of the steering wheel/ brake pedal are great, such as during active driving.
• The sensor system has a limited range for pedestrians and provides warnings and braking effect most effectively at speeds up to 30 mph (50 km/h). For stationary or slow-moving vehicles, the system functions best if your vehicle’s speed is below approximately 45 mph (70 km/h).
• Warnings for stationary or slow-moving vehicles may not be provided in dark conditions or in poor visibility.

The Collision Warning system uses the same radar sensors as Adaptive Cruise Control. For more information on the radar sensor and its limitations, see page 160.

NOTE

If warnings are given too frequently, the warning distance can be reduced (see page 175). This causes the system to provide later warnings, which decreases the total number of warnings provided.

WARNING

• The system is not activated at speeds under approx. 2 mph (4 km/h). Therefore, it will not brake your vehicle if you approach a vehicle ahead at very low speed, such as when parking.
• The driver's actions always have highest priority and override the Collision Warning system. This means that the system will not intervene in situations where the driver is actively steering, braking or pressing the accelerator pedal, even if a collision is imminent.
• When Auto-brake has prevented a collision with a stationary object, your vehicle will remain at a standstill for approx. 1.5 seconds. If your vehicle has been braked for a moving vehicle ahead, your vehicle's speed will be reduced to the same speed as that vehicle's.

The camera’s limitations

The camera is used by Collision Warning with Auto-brake, Driver Alert Control (see page 181), and Lane Departure Warning (see page 184).

NOTE

• To help protect the camera in very hot conditions, it may be temporarily switched off for approximately 15 minutes after the engine has been started.
• Keep the section of the windshield in front of the camera clean and free of ice, snow, or condensation.

WARNING

• The camera has the same limitations as the human eye. In other words, its “vision is impaired” by adverse weather conditions such as heavy snowfall, dense fog, etc. These conditions may reduce the function of systems that depend on the camera or cause these systems to temporarily stop functioning.
• Never place any objects, decals, etc., on the windshield in front of the camera. This could reduce or block the camera’s function, and could cause one or more of the systems that utilize the camera to stop functioning.
• Strong sunlight, reflections from the road surface, ice or snow covering the road, a dirty road surface, or unclear lane marker lines may drastically reduce the camera’s capacity to detect the side of a lane, a pedestrian or another vehicle.

Pedestrians

The system cannot identify all pedestrians

The Collision Warning system can only identify and detect a pedestrian who is standing upright. This person can be standing still, walking or running.

This means that the system has to be able to identify a person's head, arms, shoulders, legs, the upper and lower parts of the body and a person's pattern of movement when walking or running.

If parts of the body are not visible to the camera, the system cannot detect the pedestrian.

The following conditions apply:

• In order to detect a pedestrian, the system must have a full view of the person's entire body and the person must be at least 32 in. (80 cm) tall.
• The system cannot detect a pedestrian carrying a large object.
• The camera's capacity to see a pedestrian at dawn or dusk is limited, much as it is for the human eye.
• The camera's function is deactivated and will not detect a pedestrian in darkness or in tunnels, even if there is street lighting in the area.

WARNING

• Collision Warning with Full Auto-brake and Pedestrian Detection is designed to be a supplementary driving aid. It is not, however, intended to replace the driver's attention and judgement. The driver is always responsible for operating the vehicle in a safe manner.
• The system cannot detect all pedestrians in all situations, such as in darkness/ at night and cannot detect partially hidden pedestrians, people who are less than approx. 32 in. (80 cm) tall, or people wearing clothing that obscures the contours of their bodies.