Get it fixed and then get rid of it. I just bought a 2012 X5M with 39K miles but then I also bought an extended warranty 5/60K to have a peace of mind toO. In my mind, there's nothing out there that touches an X5M aesthetically or performance wise.
What I don't know is, how long my love affair with this babe last though
I bought it knowing all the issues, not with the S63 as much but I had to scratch the itch of owning one though