This week on Car Talk, do BMW’s really have a unique aroma, and if so, how come Diane’s husband can smell it while she can’t? Is it only discernible to men on the verge of a mid-life crisis? Elsewhere, Ed’s having trouble shifting his car out of Park, and his solution may give his insurance company an ulcer; and, Tom and Ray try to stop Steven’s mirrors from twitching before he drives into a ditch. Also, how one student’s GPA plummeted after she listened to a single episode of Car Talk; and in an effort to improve inter-species communication, Tom and Ray translate mechanics’ grunts into English. All this and more, this week on Car Talk.