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Old 07-11-2008, 04:10 PM
Join Date: Jun 2008
Location: Pensacola, FL
Posts: 38
Question 79' 300D loud clunk/rattle on right turns

My 1979 300D started making a very loud and concerning metal on metal rattle about two days ago on my home. I didn't do anything to warrant it either, it just started around a 90 degree right turn at about 15 mph. Now, it makes the sound which comes equally from both sides every time I turn right at greater than 5 mph and progressively gets faster with speed. It is definitely a rotational sound too. I thought initially it was the exhaust contacting the driveshaft so I re-hung the exhaust with some beefy c-clamps but that wasn't it and I see no wear marks anywhere on the driveshaft, on the coupling to the rear end or to both wheels. The sound is also there to a much lesser extent going over bumps.
Any ideas??
1979 300D "Red"
1985 300D Turbo "Blue"
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Old 07-11-2008, 04:27 PM
Lexxani's Avatar
MBCA Member
Join Date: Oct 2007
Location: Orlando, Florida
Posts: 699
rear sway bar?

pull your rear wheels and look for fresh damage inside (shiiiny metal), if you see this, you my friend have a sway bar to replace. Dont worry, its cheap.
". . .back before accountants designed cars"

-Current Stable-
'78 MB 450SL-C #3840 <Kayleen>
'85 FORD F250 6.9L Diesel <Allison>
'98 Lexus ES300 <Rachel>
Long Gone...
'74 Chevy G10...........................'99 GMC Yukon 4X4
'83 Chevy Suburban 6.2 diesel .....'99 SAAB 9-5
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'98 Nissan Altima .......................'02 MB ML320
'88 Chevy Suburban V2500 4X4 6.2 diesel
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Old 07-14-2008, 12:05 AM
Join Date: Jun 2008
Location: Pensacola, FL
Posts: 38

Just wanted to let you know that it was the sway bar on the right side. The stupid little plastic anchors aren't a very good design so I just cut a thick brass washer with a dremel and slid it over the ball to keep the swaybar on its anchor. Works awesome!
Thanks again for the spot on diagnosis.

1979 300D "Red"
1985 300D Turbo "Blue"
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