Yup they will. I got my set from these guys and rebuilt the entire rear link system. They are all OEM supplier parts (know that the links cross over to several Mercedes models and years so they might not be the very latest generation but meet the spec for use). The only thing I had issue was with one of the plastic covers on the lower link as the new link was wider to add stiffness. Lower control arms can be found for about 60.00 each new.

Mercedes Rear Control Arm Kit W201 W124 W202 W129 W208 | eBay