Maintains the set speed and accelerates or decelerates the vehicle if the distance from the vehicle in front permits.
Assists you in maintaining the distance from the vehicle in front and can bring your vehicle to a standstill if necessary.
Brakes your vehicle with up to 50 % of the maximum possible braking power. If greater deceleration performance is required, a visual and acoustic warning is given and you must then intervene yourself.
Vehicles with Driving Assistance Package: Responds in urban speed ranges to stationary vehicles (except bicycles, motorcycles and pedestrians) if conditions are sufficient to enable detection.
If you fail to adapt your driving style, Distance Pilot DISTRONIC can neither reduce the risk of an accident nor override the laws of physics. Distance Pilot DISTRONIC cannot take into account road, weather or traffic conditions. Distance Pilot DISTRONIC is only an aid. You are responsible for the distance to the vehicle in front, for vehicle speed, for braking in good time and for staying in lane.
If all activation conditions are met, you can activate Distance Pilot DISTRONIC during a journey or while stationary. When Distance Pilot DISTRONIC is activated, a speed is stored which the driver can increase or reduce at any time. The speed can be adjusted between 15 mph (20 km/h) and 120 mph (200 km/h).
Vehicles with the Driving Assistance Package: The speed can be adjusted between 15 mph (20 km/h) and 130 mph (210 km/h).
Vehicles with the Driving Assistance Package: In conjunction with navigation systems, Distance Pilot DISTRONIC prevents prohibited overtaking on the right at speeds over 50 mph (80 km/h) in right-hand traffic and overtaking on the left in left-side traffic on motorways and high-speed major roads.
Roundabouts
T junctions
Motorway exits
Tollbooth
Even if the vehicle in front leaves the detection range in these situations, Distance Pilot DISTRONIC temporarily maintains the current driving speed and does not accelerate.
If you activate the turn signal indicator to change lanes, the vehicle will accelerate more briskly to the set speed under the following conditions:
Distance Pilot DISTRONIC is activated.
If the driving speed is higher than 45 mph (70 km/h).
If the driven speed drops below the stored speed.
If the traffic situation in the overtaking lane permits a safe lane change.
The DYNAMIC SELECT switch allows you to change the driving style of Distance Pilot DISTRONIC. Depending on which drive program is selected, the driving characteristics can be geared towards fuel economy, comfort or dynamic performance More.
Distance Pilot DISTRONIC is active in the 0 mph (0 km/h) to 120 mph (200 km/h) speed range.
Vehicles with the Driving Assistance Package: Distance Pilot DISTRONIC is active in the 0 mph (0 km/h) to 130 mph (210 km/h) speed range.
In snow, rain, fog, heavy spray, if there is glare, in direct sunlight or in greatly varying light conditions.
If the windscreen in the area of the camera is dirty, misted up, damaged or covered.
If the radar sensors are dirty or covered.
In road and traffic conditions which do not allow you to maintain a constant speed, e.g. in heavy traffic or on winding roads.
On slippery roads. Braking or accelerating can cause the drive wheels to lose traction and the vehicle could then skid.
When there is poor visibility, e.g. due to fog, heavy rain or snow.
In multi-storey car parks or at toll stations.
On roads with steep uphill or downhill gradients.
When cornering, entering and exiting a bend.
When not driving in the centre of the lane.
When other vehicles are changing lane.
If there are narrow vehicles.
If there are obstacles and stationary vehicles.
If there are crossing vehicles, pedestrians, motorcyclists or cyclists.
When activating Distance Pilot DISTRONIC or when changing the stored speed, the new stored speed is shown for around five seconds in the 
multifunction display 50 mph (70 km/h).
When Distance Pilot DISTRONIC is active, the set stored speed is displayed next to the symbol. When distance control is active, the symbol is shown in green.
Vehicles with the Driving Assistance Package: On motorways or high-speed major roads the symbol is displayed cyclically when the vehicle is ready to pull away.