If your going to or from Kalbach then you'll be riding the U-2.
Directly behind the subway station is a very large parking lot.
Nice place to meet when being picked up by someone.
Nice place to park your car to avoid the hassel of driving around downtown Frankfurt.
There is a bus station located next to the parking lot.
** CHECK OUT THE WEB LINK FOR MORE INFO **
Here is a link to a Worldwide subway navigation page ... it may be of help to someone out there in the cyber world ... if they should ever stumble across this page. LOL.