I saw a maroon colored "557" (that's what the tag said) on the highway on Xmas eve. It was the body style that came after the e34 but before the current design. Does that mean a 5.7 L engine? I got a good look at it in bumper to bumper traffic in Phoenix, AZ, so I know I wasn't seeing things. Other than the tag, it looked like a 540i.
Anybody ever heard of this?