Why the fuck would you be embarrassed of what car you drive?
This all boil's down to appearance seemingly, I'd be proud to tell anyone that I drive a performance Ford, weather it be an RS turbo or Stian's Cosworth.
Anyone who disregard's you for what you drive is a shallow cunt and need's to get a life.
The sooner you stop worrying about what people think of you the happier you'll be in life, I realised this three years ago when I was 18!