First, the interpretation of this dream needs to be combined with your life background, otherwise it is difficult to clearly know the meaning of specific things in the dream. Generally speaking, it is a dream of life events, that is, vehicles and steamed buns are things you often encounter in your life. This dream has no obvious omen of good or bad, no vision, but a reflection of life events.
Second, luxury cars represent more ideals; White steamed bread is more representative of reality. I think your dream may reflect the distance between self-pursuit and the status quo. Although it is not a negative dream, sending white steamed bread to the car shows that you are not confident in your body. According to Chinese medicine, this is a kind of "dreaming". Although white steamed bread is not delivered directly to your mouth, the process of loading it into the car is also a process of "taking". Accordingly, you either lack self-confidence or have a constitution of qi deficiency.
Suggestion:
1. See if there is a real gap between your ideal and reality. If conditions permit, you should actively strive for it. Whether you are not confident or not, you should make yourself stronger gradually.
If you are weak recently, you need to have a rest and don't overwork.
Wish you all the best!