Mercedes-Benz GLC : Driving and driving safety systems / Function of Active Speed Limit Assist

If speed limit change between 12 mph (20 km/h) and 80 mph (130 km/h) is detected and the automatic adoption of speed limits is active, it will be automatically adopted as the stored speed.

The driven 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 Instrument Display is always updated when the vehicle is level with the traffic sign.

If there is no speed restriction on an unlimited stretch of road (e.g. on a freeway), the recommended speed is automatically adopted as the stored speed. The system uses the speed stored on an unlimited stretch of road as the recommended speed. If you do not alter the stored speed on an unlimited stretch of road, the recommended speed is 80 mph (130 km/h).

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.

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

System limits

The system limits of Traffic Sign Assist apply to the detection of traffic signs.

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. The maximum permissible speed applying to a vehicle with a trailer is not 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.