I vote wheel bearing too. Sounds like it wasn't torqued in quite right and your sideways slide unseated it.


A remote possibility is the SLS valve. How's the rear riding?

Get under there and check the SLS linkages and sway bar setup, make sure it's not bound up in some incorrect position. When the valve is in a position where it is partially open, it can make a hydraulic groaning sound. If you have a busted accumulator, the constant pressure bleed could be enough to keep the valve open slightly, generating this noise.

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-tp


1990 300SE "Corinne"- 145k daily driver - street modified differential - PARTING OUT OR SELLING SOON - PORTLAND OR. AREA - PM ME FOR DETAILS
1988 560SEL "Gunther"- 190K passes anything except a gas station
1997 S420 - 265k just bought it with a rebuilt trans. Lovely condition