When traveling over moderately rough roads, I have been getting a dull noise from the front suspension on my e320. My mechanic tells me it's the strut bearing point. He said that the point of bearing is tight when the car is sitting on the ground and also tight when it's raised, as on a lift, so it's difficult to diagnose. He also indicated there is no way to tighten this area of the suspension, except to replace the struts. Has anybody experienced this on their MB? Does anybody know how difficult/expensive strut/shock replace is?
Is it a DIY job?