2000 BMW 3 SERIES User Comment / Complaint

I recently purchased the car used. then took it to my local mechanic for thorough inspection and maintenance tune up. front and rear shocks and struts along with springs replaced with oem parts. he and i located the subframe on the rear driver was torn. car is mechanically sound and the only issue right now is that when driving, i can hear the metal on metal clunking noise. afraid that if it does not get repaired, it will lead to more structure problems with the car. i'm scare to drive the car fearing that an accident is waiting to happen. please help with investigation into possible defect on bmw 3 series. i know that there is currently a class action lawsuit has been filed with wasserman, comden & casselman, l.l.p regarding manufacturing and/or design defect that severely compromises the safety, durability, and performance of the vehicle. which alleges that the manufacturing and/or design defect includes a weak or insufficient floor panel in the unibody of the vehicle that causes, among other things, cracking in the floor pan and misalignment, cracking or the complete or partial failure of the rear subframe of the vehicle.