On my 1994 Merc 320E class estate, I have a water leak coming from behind what looks like the power steering mount. (Cast into it is Mercedez Benz 103 131 09 35). It also has what looks like a breather hose going to it. I guess it could be a crankcase breather & power steering mount all in one? Is water fed to this item & the gasket has gone, or is the water leak likely to be a leaking freeze plug from behind it?
Please see picture for clarity. I've arrowed where the water is dripping from in red. The photo is taken from looking up underneath the offside for USA readers; (nearside for UK readers).

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