Experiance is really the only solution. After working on these cars long enough you will learn what to look and listen for.

A very slight amount of slop if the drive shaft is probably ok. But there is a center support bearing there that does wear, and to much will cuase vibrations.

__________________
2006 CL500
2009 C300 4matic
1969 280SE
2023 Ram 1500
2007 Tiara 3200