I had this on a 63 Pontiac happen, after 70 mph ride on thruway, got off, sudden stop at light and bang, wheel folded . (many NY cabs have this problem. not a nice experience. If control arm is not damaged, you can get bolt on ball joints from Adsit for most mercedes Suggest new ones for both wheels. You still will have to have alignment adjustment after installation. You may need new ( or used control arm) Mercedes ball joints from factory are pressed in. good luck, been there, Abe G