Originally Posted by Smith007

2002 ML 320 Km 186 000.00
Water does not appear to be leaking from above the pulley, but dripping from bottom end of the water pulley.
Question please:
Does the ML 320 water pump have a wear hole in the above location?
Yes, just right under the big hose inlet.

If there is no wear hole, is this location [bearing] where water leaks out of the pump when it is on its way out?
if the pump is on the way out, you will see a leak, it will progressively get worse. Don't know how many miles you have gone through, my original water pump only last 60 some thousand miles.

Appears to be leaking when vehicle engine is turned off, "approximate" time until the pump goes completely? assuming the above is correct and it has a wear hole?

Don't know for sure, watch out for your coolant, if you see it starts turning dark, your impeller (getting wobbly) may be grinding the timing cover, once it gets a hole, it becomes a very expensive repair.

Please and thank you!