The good news is that you can get a new set of control arms on Ebay for a very reasonable price.

Link

The bushing kit alone would cost you $50 and $30 or so for 1 ball joint. You do the math.

Good Luck

**Edit** Just realized the E 320 is not on the fitment list. I guess you are out of luck or maybe it will fit.

__________________
-Paul-
'01 E430, Sport 72,000 mi
'98 C280, 126,500 mi