Only one of the four rear links are alignment adjustable with an eccentric bolt... it controls toe-in. Everything else is fixed geometry, so the rubber really matters. With just a couple links off it's amazing how wobbly that rear wheel gets.

The rubber also dampens shock, like torsion shock absorbers at every joint. This is why its important to have the weight of the car on the axle when you tighten the links into place, to establish a neutral sprung position.

I am putting off alignment until all the suspension and steering pieces I want to replace get done, then align. That's the icing on cake.

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Cheers!
Scott McPhee

1987 300D