I belong to bimmerfest. It's OK, but no comparison the this forum, imho. Maybe it's because I have a new 328i, so most of the posts center around peoples' color choices, dealer recommendations, what kind of deals they're getting, etc. You didn't say how old your 740iL is, but if it's more than a few years old, hopefully there'll be more discussion about the mechanics of the car itself. Also, try googling "BMW forums." Maybe there's something better out there. Good luck.