Front end rumble...upper control arms? - Mercedes-Benz Forum
 
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#1 (permalink) Old 02-02-2012, 09:01 PM
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Front end rumble...upper control arms?

Well, to date, I have replaced the following front end components with OEM:

Control Arm Bushings
Lower Ball Joints
Air Struts
Lateral Arms
Sway Bar w/bushings
End Links

With each replacement, the front end keeps getting tighter, but I still get a rumble or light rattle over shallow bumps at a low speed from the passenger side only. Based on process of elimination, I'm assuming this must be the Upper Control Arms, but I thought I would see what you guys think before I drop another $700 into the front end!
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#2 (permalink) Old 02-03-2012, 08:28 AM
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Did you try raising the front end and rcoking the wheel, wiggling it up down left right?

Often at times a worn out control arm may give the wheel some play that may be felt. However any mechanic should do a visual inspection at no cost
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#3 (permalink) Old 02-03-2012, 09:52 PM
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Plenty of mechanics looking at this one. I don't think the arms are showing any notable wear, but the rumble is obvious. Based on what I replaced, could it be anything else?
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#4 (permalink) Old 02-04-2012, 03:34 PM
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Try checking out the inner and outer tie rods. I currently have the rattle and thats actually where I'm going to start, and then work my up to the control arms eventually.
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#5 (permalink) Old 02-04-2012, 09:09 PM
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Hmmm.. I am convinced I have something like that in the rear end.. the front seems solid, but sure would like to figure it out.. I am wondering if it is normal with the air suspension.. I agree with the above on the tierods.. very well could be it.. how tight is your steering?
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#6 (permalink) Old 02-05-2012, 07:06 AM
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The steering is very tight with no play, that's why I'm thinking upper arms. I guess on the one hand, I'm simply running out of parts to replace, so it's one or the other.
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