Hi, thaks for your awnswers. I ended up buying the lower control arms used from Mercedes cars. I didn't know the suspension parts were compatible among so many models, as Infinity says.

http://www.ebay.com/itm/OEM-Mercedes-W210-E320-E420-96-02-Rear-Lower-Control-Arm-Spring-Perch-L-or-R-/190921285778?pt=Motors_Car_Truck_Parts_Accessories&fits=Model%3ASLK320&hash=item2c73cba092&vxp=mtr
http://www.ebay.com/itm/96-97-98-99-00-01-02-MERCEDES-C240-E320-REAR-RIGHT-PASSENGER-LOWER-CONTROL-ARM-/231070238372?pt=Motors_Car_Truck_Parts_Accessories&fits=Model%3AC230&hash=item35ccdc06a4&vxp=mtr
http://www.ebay.com/itm/Mercedes-Rear-Control-Arm-Arms-Kit-W124-W202-W129-W201-W210-HD-NEW-/300957990040?pt=Motors_Car_Truck_Parts_Accessories&fits=Model%3ASLK320&hash=item46127e7c98&vxp=mtr
Hope with this stuff I can get my suspension straight, since it looks really ugly. I will post pictures when I receive the "new" (used) parts and when the old ones are removed.