540i purchase?

Hey guys im thinking about purchasing a bmw 540i 6 speed model years 1997-1999 with around 100k on the clock. What are some of the things that i should be watching out for on these cars? Also anyone know if this has a limited slip diff?

check some things, like start it up and se how it runs, see how the leather is, and if ht ecar was repainted dont buy it, theres a way to check, if u lift the hood usually on the tips off the hood there could be littl epaint lumps, if there is it was repainted, ask tehm if u could drive it, other then that if its all good go ahead and buy it, good car