Ok, well I'm glad I posted the picture of the interior because I had no idea whether or not I needed to get an updated navigation system. How can I tell what system I have installed on this 540i? I'll check out that link you put, thanks LeMans.

I'll search and see if it's the original radiator and expansion tank. But just for my own personal info, what is an expansion tank?

At least I'll have a fun little project for the next few weeks or so, a lot and a lot of cleaning to do on the engine...