88 560SEL subframe and control arm on 90 300SEL?
 

I have a 1990 300SEL (W126) that needs the rear subframe and rear driver side (left) control arm replaced. Apparently it looks like the PO may have slid sideways into a curb or something and bent it enough that the wheels cannot be aligned properly. My question is whether or not a subframe and control arm from a 1988 560SEL (W126) parts car would be a good replacement. Thanks in advance for your help!

Both are the same chassis, so yes, swap the whole rear axle but keep the differential.