This dream may symbolize a desire for control and power in your waking life. The expensive self-driving Mercedes represents success and luxury, and hijacking it may suggest a desire to take control of your own success and destiny. However, the fact that you start driving it manually and then leave it in the hands of a gang may indicate feelings of insecurity or fear of taking risks. The supermarket may represent your daily routine and responsibilities, and the bag you are holding may symbolize the burdens or material possessions you carry with you. The gang threatening you could represent external pressures or challenges that are hindering your progress. The rain could symbolize emotional turmoil or cleansing. Asking for directions to a bus stop may suggest a need for guidance or direction in your life. Overall, this dream may be a reflection of your subconscious desires, fears, and struggles related to success, control, and decision-making.