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  • A-Class
  • Compact saloon
  • 03/2018
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Function of cruise control

Cruise control regulates the speed to the value selected by the driver.

If you accelerate to overtake, for example, the stored speed is not deleted. If you remove your foot from the accelerator pedal after overtaking, cruise control will resume speed regulation back to the stored speed.

Cruise control is operated using the corresponding steering wheel buttons. You can store any road speed above 20 km/h up to the maximum road speed or to the set winter tyre limit.

If you fail to adapt your driving style, cruise control can neither reduce the risk of an accident nor override the laws of physics. It cannot take into account road, weather or traffic conditions. Cruise control is only an aid. You are responsible for maintaining a safe distance to the vehicle in front, for vehicle speed, for braking in good time and for staying in lane.

Displays on the multifunction display

The status of cruise control and the stored speed are shown in the multifunction display.

Cruise control is selected
Speed is saved, cruise control is deactivated
Speed is saved, cruise control is activated

The segments extending from the current stored speed to the end of the scale, or to the set winter tyre limit, light up in the speedometer.

System limitations

Cruise control may be unable to maintain the stored speed on uphill gradients. The stored speed is resumed when the gradient evens out.

Change into a lower gear in good time on long and steep downhill gradients. Take particular note of this when driving a laden vehicle. By doing so, you will make use of the engine's braking effect. This relieves the load on the brake system and prevents the brakes from overheating and wearing too quickly.

Do not use cruise control in the following situations:
  • In traffic situations which require frequent changes of speed, e.g. in heavy traffic, on winding roads.

  • On slippery roads. Accelerating can cause the drive wheels to lose traction and the vehicle could then skid.

  • If you are driving when visibility is poor.