Mercedes-Benz GLC : Driving and driving safety systems / Active Lane Change Assist

Function of Active Lane Change Assist

Active Lane Change Assist supports the driver when changing lanes by applying steering torque if the driver operates a turn signal indicator.

Observe the notes on driving systems and your responsibility; you may otherwise fail to recognize dangers.

Assistance when changing lanes is provided if all the following conditions are met:

• You are driving on a freeway or road with multiple lanes in the direction of travel.
• The neighboring lane is separated by a broken lane marking.
• No vehicle is detected in the adjacent lane.
• The vehicle speed is between 50 mph (80 km/h) and 110 mph (180 km/h).
• Active Lane Change Assist is switched on in the multimedia system.
• Active Steering Assist is activated and active.

If no vehicle is detected in the adjacent lane and a lane change is permitted, the lane change begins after the driver has activated the turn signal indicator. This is shown to the driver with a green arrow next to the steering wheel symbol. The message, for example, also appears. If Active Lane Change Assist has been activated with the turn signal indicator but a lane change is not immediately possible, a gray arrow appears next to the steering wheel symbol, which remains green.

When the lane change assistance starts, the turn signal indicator is automatically activated along with the display in the multifunction display.

If the assistance graphic is shown when changing lanes, an additional arrow appears in it pointing towards the adjacent lane.

If a lane change is not possible, the arrow is faded out after a few seconds and a new lane change must be initiated. An immediate lane change is only possible on freeway sections without speed limits.

If the system is impaired, Active Lane Change Assist may be canceled. If it is canceled, the message appears in the multifunction display.

In addition, a warning tone may sound, depending on the situation.

WARNING Risk of accident when changing lane to an occupied adjacent lane

Lane Change Assist cannot always clearly detect if the adjacent lane is free.

The lane change might be initiated although the adjacent lane is not free.

Before changing lanes, make sure that the neighboring lane is free and there is no danger to other road users.

Monitor the lane change.

WARNING Risk of accident if Lane Change Assist unexpectedly stops functioning

If the system limitations for Lane Change Assist have been reached, there is no guarantee that the system will remain active.

Lane Change Assist cannot then assist you by applying steering torque.

Always monitor the lane change and keep your hands on the steering wheel. Observe the traffic conditions and steer and/or brake if necessary.

System limits

The system limitations of Active Steering Assist apply to Active Lane Change Assist.

The system may also be impaired or may not function in the following situations:

• The sensors in the rear bumper are dirty, damaged or covered by a sticker or ice and snow, for example.
• The exterior lighting shows a malfunction.

The Active Lane Change Assist sensors adjust automatically while a certain distance is being driven after the vehicle has been delivered. Active Lane Change Assist is unavailable or only partially available during this teach-in process; no arrow appears next to the Active Steering Assist symbol when the turn signal indicator is activated.

Selecting Active Lane Change Assist

Multimedia system:

Settings Assistance Active Lane Change Assist

Select the function.