My ML320 sounds like it's holding some water after sitting out in the rain overnight - it was a clear sound while backing up, and moving forward slowly during braking. I tried to duplicate it in the garage by rocking the car from the outside, but couldn't hear it then. I've seen this on other cars with AC condensate building, but I haven't used the AC since Friday, and just had the car out yesterday without this noise.

I've had the car since new in '98, any ideas?

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Francis E. Abate
Automotive Restoration & Preservation
Sheet metal, trim and upholstery