On my 00 E430, w210 series, the battery is under the rear passenger side seat.
when I lift off the seat, there's a thin layer of foam/cushion that is covered with think plastic on both ends.
My assumption is it's there to absorb water incase water is spilled on the seat so that the electronics under the seat doesnt get soaked etc.
I need to change that because it's deteriorated. I called up the dealer parts dept. but they didnt know what the part number is or what it is called.
if someone could give me the name or the part # for it, I could then order it.
thanks in advance.

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