My dad recently went to his friend's used car dealer place and managed to get a Mercedes E300 for 50 on layaway for me. The car doesn't really look all that bad, it looks like the old owner didn't use it much. Besides dust and some small dirt spots here and there, this car looks pretty fresh. Is that car good overall? By overall, I mean MPG, reliability, and all that. I'm trying to get a fuel efficient and reliable car.