When I was an undergraduate, I was a student majoring in automobile service engineering. When I graduated from college, even the academic affairs office of the school didn't understand what car service was for. No unit dares to use it. You said that you have studied all the courses of automobile engineering and management, but whoever believes in the company depends on the professional name.
I am now a graduate student in vehicle engineering at the Automotive College of Chang 'an University. Regardless of the salary difference, your own ability has certainly developed greatly. When I studied automobile service, we were very happy to have an automobile factory, with little achievement. Most of the graduates have gone to make claims for damages. Now, except for Shanghai Volkswagen, other automobile factories have come to recruit students, but they are basically vehicle engineers. You think too much. Now, even if many automobile manufacturers come to interview for recruitment, the general unit will not go after reading the master's degree in vehicles, either a large joint venture or a research institute with great potential.
I don't know if you are a boy or a girl. If you are a girl, that's fine. If it's a boy, it's better to do engineering. After all, car service is management, so it is better to continue further study. Although there is little difference between graduate school and undergraduate course now, personally, my knowledge of automobiles is still in the graduate stage!
Finally, I wish you success!
Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.