If you want to keep the car, change the transmission fluid / filter now. The recommendation is change it around 60K miles to keep the car running well past 100K.
2008 528i: Ti Silver/Black/Light Poplar Wood, ZPP, ZCW, STEP, Comfort Seat, Heated Rear Seat, PDC, Xenon, Nav, iPod. 35% ceramic tint. VentureShield Clear Bra.