It was silver with the lower black plastics colour coded, had what looked like 18" RS4 alloys on and the rear lights were tinted a dark colour. It was also lowered slightly.
Sorry can't remember what motorway it was but I'm sure it was just south of Birmingham on either the M6 or M5. The car had been front ended quite heavilly. I thought I'd post it up here because it did look a really nice car and could only of been owned by an enthusiast.