You need assistance on the autobahn. Which information does the arrow on the roadside marker give you?

You correctly identified the arrow on the roadside marker as pointing to the nearest emergency call telephone in that direction. These markers on the autobahn help drivers quickly locate emergency phones in case of breakdowns or accidents. The arrow indicates the direction to walk or go to reach the emergency phone. This is important because not all areas on the autobahn have mobile phone reception, so the fixed emergency phones provide a reliable way to call for help. Remember, this marker does not indicate car parks or exits, only emergency telephones. Knowing this helps you act quickly and safely in an emergency situation on the autobahn.