Mercedes-Benz S-CLASS SEDAN 2023 Active Speed User Manual

Table of Contents

Mercedes-Benz S-CLASS SEDAN 2023 Function of Active Speed Limit Assist User Manual

The function of Active Speed Limit Assist

If a changed speed limit is detected and the automatic adoption of speed limits is switched on, this is automatically adopted as the stored speed (/ page 267). Speed limits below 12 mph (20 km/h) are not accepted.
The driving speed is adjusted when the vehicle is level with the traffic sign at the latest. In the case of signs indicating entry into an urban area, the speed is adapted according to the speed permitted within the urban area. The speed limit display in the driver’s display is always updated when the vehicle is level with the traffic sign. If you are driving on German highways and there is no speed limit, the system uses the speed stored for a stretch of road with no speed limit as the set speed. If you do not alter the stored speed on a stretch of road with no speed limit, the recommended speed of 80 mph (130 km/h) is adopted.

If Active Distance Assist DISTRONIC has been put into passive mode by pressing the accelerator pedal, only speed limits which are higher than the set speed are adopted. The maximum permissible speed does not take the road condition and current weather and traffic conditions into account. Adjust your speed accordingly, when necessary. Observe the notes on driving systems and your responsibility; you may otherwise fail to recognize dangers (/ page 252).

System limits
The system limits of Traffic Sign Assist apply to the detection of traffic signs (/ page 278). Speed limits below 12 mph (20 km/h) are not automatically adopted by the system as the stored speed. Temporary speed restrictions (e.g. for a certain time or due to weather conditions) cannot be properly detected by the system.
Adjust the speed in these situations.

WARNING
Risk of accident due to Active Speed Limit Assist adapting the vehicle’s speed The speed adopted by Active Speed Limit Assist may be too high or incorrect in some individual cases, such as:

At speed limits below 12 mph (20 km/h)
In wet conditions or in fog
When towing a trailer
Ensure that the driven speed complies with traffic regulations.
Adjust the driving speed to suit current traffic and weather conditions.

The function of route-based speed adaptation

When Active Distance Assist DISTRONIC is activated, the vehicle speed will be adapted accordingly to the route events ahead. Depending on the drive program selected, the vehicle negotiates a routed event ahead in an energy-saving, comfortable or dynamic manner. When the route event has been passed, the vehicle accelerates again to the stored speed. The set distance to the vehicle in front, vehicles detected ahead and speed restrictions ahead are taken into account.
Route-based speed adaptation can be activated in the multimedia system (/ page 267).

The following route events are taken into account:

Bends
Traffic circles
T-intersections
Turns and exits
Traffic jams ahead (only with Live Traffic )Also, the speed is reduced if the turn signal indicator is switched on and one of the following situations is detected:
Turning at intersections
Driving in slowing-down lanes
Driving in lanes adjacent to slowing-down lanes
The driver is responsible for choosing the right speed and observing other road users. This applies in particular to intersections, traffic circles, and traffic lights, as route-based speed adaptation does not brake the vehicle to a standstill.

Speed adaptation is canceled in the following cases:

If the turn signal indicator is switched off before the route event and it is therefore assumed that the route event is not relevant to the driver.
If the driver depresses the accelerator or brake pedal during the process.
System limits Route-based speed adaptation does not take right-of-way regulations into account. The driver is responsible for complying with road traffic regulations and driving at a suitable speed.In difficult conditions, the speed selection made by the system may not always be suitable. This applies to the following situations, for example:
The road’s course is not clearly visible.
Road narrowing.
Varying maximum permissible speeds in individual lanes, for example at toll stations.
Wet road surfaces, snow, or ice. In these situations, the driver must intervene accordingly.

WARNING
Risk of the accident in spite of route-based speed adaptation Route-based speed adaptation can malfunction or be temporarily unavailable in the following situations:

If the driver does not follow the calculated route
If map data is not up-to-date or available
In the event of roadworks
In bad weather or road conditions
If the accelerator pedal is depressed
In the event of electronically displayed speed limitations
Adapt the speed to the traffic situation.

Setting Active Distance Assist DISTRONIC driving styles

Requirements

Active Distance Assist DISTRONIC is activated.

Multimedia system:
Home > Settings >Assistance > Driving >Active Distance Assist

Selecting a driving style

Select Based on DYNAMIC SELECT, Dynamic or Comfortable.
Further information about Active Distance Assist DISTRONIC (/ page 263)

Setting speed adaptation

Select Adopt Speed Limit or Route-based Speed.
When these functions are active, the vehicle speed is adjusted depending on a routed event ahead or a speed limit. % When one of the following systems is active, the detected speed can be manually adopted as the speed limit:
Active Distance Assist DISTRONIC
Variable limiter Further information on speed adaptation (/ page 266).

The function of Active Stop-and-Go Assist
Active Stop and Go Assist helps you when in traffic jams on multi-lane roads with separate roadways by automatically pulling away within up to 60 seconds and with moderate steering maneuvers. It orients itself using the vehicle in front and lane markings. Active Stop-and-Go Assist automatically maintains a safe distance from the vehicle in front and vehicles cutting in. Active Stop and Go Assist requires you, as the driver, to keep your hands on the steering wheel at all times so that you are able to intervene at any time to correct the course of the vehicle and keep it in the lane.

Observe the notes on driving systems and your responsibility; you may otherwise fail to recognize dangers (/ page 252).
Active Stop-and-Go Assist activates automatically when all of the following conditions are met:
You are in a traffic jam on a highway or high-speed major road.
Active Distance Assist DISTRONIC is activated and active (/ page 263).
Active Steering Assist is activated and active (/ page 270).
You are traveling no faster than 35 mph (60 km/h).
When Active Stop-and-Go Assist is active the ¬ status display appears on the driver’s display.

System limits
The system limitations of Active Distance Assist DISTRONIC and Active Steering Assist apply to Active Stop-and-Go Assist (/ page 268).

Active Steering Assist

Depending on the country, the lower speed

The function of Active Steering Assist
Active Steering Assist is available only up to a speed of 130 mph (210 km/h). The system helps you to stay in the center of the lane by means of moderate steering interventions. Depending on the speed driven, Active Steering Assist uses the vehicles ahead and lane markings as a reference. Depending on the country, in the lower speed range, Active Steering Assist can use the surrounding traffic as a reference. If necessary, Active Steering Assist can then also provide assistance when driving outside the center of the lane. If the detection of lane markings and vehicles ahead is impaired, Active Steering Assist switches to passive mode. The system provides no support in this case.

Permanent status display in the driver’s display
Range Active Steering Assist can use the surrounding traffic as a reference. If necessary, Active Steering Assist can then also provide assistance when driving outside the center of the lane. If the detection of lane markings and vehicles ahead is impaired, Active Steering Assist switches to passive mode. The system provides no support in this case. Permanent status display in the driver’s display% During the transition from active to passive status, the Ø symbol is shown as enlarged and flashing. Once the system is passive, the

Contact detection
The driver is required to keep their hands on the steering wheel at all times and be able to intervene at any time to correct the course of the vehicle and keep it in lane. The driver must expect a change from active to passive mode or vice versa at any time.

If the system detects that the driver has not steered the vehicle for a considerable period of time or has removed their hands from the steering wheel, an optical warning is given first. Display 1 appears in the driver’s display.
If the driver still does not steer the vehicle or gives no confirmation to the system, a warning tone sounds in addition to the visual warning message.
If the driver does not react to this warning for a considerable period, an emergency stop is initiated (/ page 270).
The warning is not issued or is stopped as soon as the system detects that the driver has touched the steering wheel. The touch detection may be limited or may not function if there is no direct contact between the hand and the steering wheel, e.g. when wearing gloves or if there is a steering wheel cover on the steering wheel.
If Active Steering Assist detects that a system limit has been reached, a visual warning is issued and a warning tone sounds.
Observe the notes on driving systems and your responsibility; you may otherwise fail to recognize dangers (/ page 252).
System limits
Active Steering Assist has a limited steering torque for lateral guidance. In some cases, the steering intervention is not sufficient to keep the vehicle in the lane.
The system may be impaired or may not function in the following instances:
There is poor visibility, e.g. due to snow, rain, direct sunlight or reflections.
Insufficient road illumination.
The windshield is dirty, fogged up, damaged or covered in the vicinity of the camera, e.g. by a sticker.
No, or several, unclear lane markings are press hurt and thus the lane markings cannot be detected.
The road is narrow and winding.
There are obstacles on the lane or projecting out into the lane, such as object markers.
The system does not provide assistance in the following conditions:
On very tight bends and when turning.
When crossing intersections.
At traffic circles or toll stations.
When actively changing lanes without switching on the turn signal indicator.
When the tire pressure is too low.

WARNING
Risk of the accident if Active Steering Assist unexpectedly stops functioning If the system limits of Active Steering Assist are reached there is no guarantee that the system will remain active or will keep the vehicle in lane.

Always keep your hands on the steering wheel and observe the traffic carefully.
Always steer the vehicle paying attention to traffic conditions.

WARNING
Risk of an accident if Active Steering Assist unexpectedly intervenes

The detection of lane markings and objects may malfunction and cause unexpected steering interventions.
Steer according to traffic conditions.

Activating/deactivating Active Steering Assist

Requirements

ESP® is activated but is not intervening.
Active Distance Assist DISTRONIC is activated.

Multimedia system:
Home > Settings >Assistance > Driving

Activate or deactivate Active Steering Assist.

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Reference Links

View Full User Guide: Mercedes-Benz S-CLASS SEDAN 2023 User Manual

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