@Milky Here is what you need to do:
Find an area with a lot of colleges or a large one. Having a decent international student population is a must.
Learn everything about fixing modern BMW, Mercedes, Mini, and VAG cars.
Open an independent auto repair place that only does those cars and charge rates just below what the dealerships charge. Don't take on any business that low dollar, just stuff that's $2k or more. Your capacity is limited and only take on the small stuff when your schedule has openings. Be honest but fix it right and fix everything that is wrong.