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  • A-Class
  • Compact saloon
  • 03/2018
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Vehicle conditions for the automatic engine stop or start

In a few countries, the ECO start/stop function is not available in any drive program due to the available fuel grade, regardless of the multimedia system display.

Conditions for the automatic engine stop:
  • the ECO start/stop function is switched on.

  • the brake system does not require a running engine.

  • the outside temperature and atmospheric air pressure is within the range that is suitable for the system.

  • the engine is at normal operating temperature.

  • no engine diagnosis is active.

  • the engine speed is within the range that is suitable for the system.

  • the transmission oil temperature is within the range that is suitable for the system.

  • the temperature in the vehicle interior is within the set range.

  • the fuel tank is sufficiently filled.

  • the system detects that there is no moisture on the windscreen when the air conditioning system is switched on.

  • the charge level and the voltage of the battery are sufficient.

  • the battery temperature is within the range that is suitable for the system.

  • the system does not recognise a steep uphill or downhill incline.

  • the bonnet is closed.

Conditions for the automatic engine start:
  • the vehicle is rolling.

  • the brake system requires a running engine.

  • the engine temperature has exceeded the range that is suitable for the system.

  • the outside temperature or atmospheric air pressure has exceeded the range that is suitable for the system.

  • engine diagnosis requires a running engine.

  • the transmission oil temperature has exceeded the range that is suitable for the system.

  • the temperature in the vehicle interior deviates from the set range.

  • the system detects moisture on the windscreen when the air conditioning system is switched on.

  • the charge level of the battery is too low.

  • the battery temperature has exceeded the range that is suitable for the system.

  • the system recognises a steep uphill or downhill incline.