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1980 450sl Knocking when brakes applied
Hey folks, I am getting this loud knocking, and shuddering sound when applying the breaks from forward driving. It is a very fast knock like a machine gun and feels like it is only in front passenger side of the vehicle. I need to test it again while rolling in neutral to see if it only happens in drive but does this sound familiar to anyone? I do not get this pulse by applying the breaks when the car is stationary so I am not thinking it could be a vacuum issue with the brake system, it is only when the car is moving forward. The faster the car goes the faster and louder the knocking sound is. Any ideas?
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