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Applies to: vehicles with traffic jam assist
The traffic jam assist function helps the driver in traffic jams or congested traffic.
- Fig. 158 Turn signal lever: Traffic jam assist activation button
- Fig. 159 Instrument cluster: Traffic jam assist
The traffic jam assist is an extension of the active lane assist link► and uses its functions in conjunction with the functions of the adaptive cruise control link►. The traffic jam assist can help to keep the vehicle in lane. The system steers the vehicle automatically when the adaptive cruise control is switched on (subject to certain inherent system limitations). As the name implies, the purpose of the traffic jam assist function is to assist the driver; the driver must keep his/her hands on the steering wheel at all times and must always be ready to take over the steering. The driver can override the automatic steering at any time by steering manually.
The system is designed for driving on motorways and major roads.
Requirements for using the traffic jam assist
The vehicle s speed must be below 65 km/h.
The active lane assist must be switched on and it must have detected a demarcation line on both sides of the lane you are in link►. The early setting must be selected for the steering input on the infotainment system link►.
The adaptive cruise control must be switched on and activated link►.
Switching the traffic jam assist on/off
Press the button Fig. 158► to switch the system on/off.
Always switch off the traffic jam assist in the following situations:
- In situations requiring extra care and attention from the driver.
- In poor weather, for instance in snow or heavy rain.
- In poor road conditions.
- In roadwork areas.
- In city traffic.
Indicator lamps
and 
- Traffic jam assist is switched on. Vehicle detected in front. The system is controlling your vehicle as it moves Fig. 159►.
If the driver does not take over the steering after being prompted with several severity levels, the traffic jam assist will be switched off and the emergency assist will be activated link►.
WARNING
Always leave your hands on the steering wheel and be ready to steer at all times. It is always the driver s responsibility to keep in the traffic lane and to assess the traffic situation and take appropriate care. Please observe the safety warnings ►. Never use the traffic jam assist in the following situations - risk of accident!
- On off-road terrain or unsealed roads.
- In city traffic or roadwork areas.
- On twisty roads.
- In narrow traffic lanes.
- In unpredictable traffic situations, e.g. at intersections or toll gates.
Note
The system does not always keep the vehicle in the centre of the lane.