I'm following this thread as I think my pump might be toast too...

My rear end does not self level, but it does not bounce and is firm (which I heard means the accumulators are OK)
Fluid is good and no leaks. So what else could it be? Sound like the pump to you guys too?

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
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2003 Gray Mercedes ML350 - 122k