Finally got a close look at that back engine lifting bracket...it seems the heater hose barb/nipple is spot welded to the bracket. Because it is so close to the firewall, I can't get the bracket off with regular Allen wrenches so I need to get some hex bits. My guess is that John is right and I need to replace that 'o' ring...the bracket has water/antifreeze stains on it so it looks like the leak is coming from there. Does anyone know the size of the 'o'ring and is it something i can pick from Lowes/Home Depot, or do i have to drive across town to the Mercedes dealership?

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'87 BMW 325 convertible (162k + miles)
'87 300E, 144k + miles (sold)
'93 Chevy Blazer (full size), 207K + miles
'89 Sea Ray 390EC, 2 x 454's, 1550 hours...
'85 AMF Sunfish

Olde Towne Portsmouth, VA