Just do the ball joints, If you have the money to replace the entire control arm, do it. But before you replace it, just check and see if the bushing in the control arm is worn, if so, THEN replace it.
You might need to get your car aligned after replacing front end suspension parts.

__________________
1987 mercedes 300E
1995 e320 conversion(hated the 300e grill)
HID/Xenon (D2S)
Keyless Entry
Monochromatic Paint (Custom Blue)
Smoked Tails
Flat Badged (front)
Debadged (rear)
custom "carbon fiber" console
18 inch HP EVO rims
Sold! Now I drive a Monte Carlo SS
http://memimage.cardomain.net/member.../352975_67.jpg
http://memimage.cardomain.net/member.../748335_24.jpg