So, I have a newly discovered and rotted rear sub frame on my 2010 w204 and a whopping 43k miles. The car is in mint condition and has been kept inside when not driven. I noticed a chirping from the rear and took it to the dealer. My control arm bracket completely broke off on the left side and the right side is also cracked. The dealer quoted me $2500 plus tax. I have decided to have a local shop do the work and source a used sub frame. My question is making sure I order the right accessory parts as it appears MB has changed part numbers over the years. With the used sub frame, should I also order replacement bushings and mounts, and does anyone know the right part numbers for the right bushings and mounts? I have searched many sites and just cannot narrow it down to the right extra parts. Also, I read something about updating the mounting bolts as well. Any help would be appreciated. Thanks.