Originally Posted by Diseasel300

I'll second this advice. My 560SEL had a good 2" of slop in the steering when I got it, all over the road and borderline unsafe in crosswinds at highway speed. Rebuilding the front end got it down to 1.5" or so, but when I redid the rear, it's now under an inch. No adjustment to the steering box at all. Car never wanders or weaves. Subframe bushings make a HUGE difference on how stable the car is on the road.

Alignment matters too. You want the toe as close to zero as you can get it. I've found with the 126 anyway, that positive toe (even a tiny bit) will make the car wander on a crowned or sloped road and you'll feel like you're rocking the wheel all the time.