Which to buy 540i or mustang help plz?
First, because you are a first time buyer I would suggest to buy an American car because you cand add some cheap parts to your car. Instead if you wanna choose a good car and quality of driving every day, try a BMW. But be carefully, if you have any problems with your BMW will be a very expensive ride. I'm from Europe and I like germans, I have here in USA a BMW 528i and it's a very good car .
Buy what you can afford, because the car is not an investment, you spend money with cars. Use american cars.