2000 ML 550 AMG exhaust clunk noise.. - Mercedes-Benz Forum

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post #1 of 3 (permalink) Old 08-19-2009, 12:46 PM Thread Starter
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Cool 2000 ML 550 AMG exhaust clunk noise..

Hi there.. I have a 2000 AMG ML 550 with 150K.
No problems with engine, driveline, but recently I have been
hearing a slight rattling noise on startup near the top of the exhaust tube on the drivers side. Almost like a loose bolt or flap clinking..
Does the collector near the exhaust manifold have a gate or pin that could work loose inside? Does not seam like a loose shield or bracket..
Figured I'd ask here as there seems lots of good information..JP
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post #2 of 3 (permalink) Old 11-11-2009, 06:49 AM
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Hi There,

Dont know if you came right already, but I had the same problem. First thought it was a loose exhaust bracket and left it till I get to a Merc garage to pick up spares. A week later I tried to overtake a truck.. Full throttle, geared back, and the next moment my engine management light came on!
The problem turned out not to be a missing exhaust bracket, but the core of my catalytic converter has disintegrated, broken up into smaller chunks, and blocked my exhaust pipe (resulting in my engine misfiring).

Word of advice: cut the cats out, and leave them out! I first tried replacement cats, but my 5.5L V8 cleaned them out in less than a month! So I just replaced the cats with pipes.
Without the cats my ML now sounds like a V8, AND has more power!

Hope this helps!
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post #3 of 3 (permalink) Old 11-14-2009, 06:46 PM
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