You can sort of see it under the exhaust manifold toward the rear using a mirror but it is easier to see from underneath. It has a hole and is meant to be used with a hose--I tried that but used an old long heater hose that did not fit very well. I spilled as much as if I'd just opened it and let it pour down into a tub.

How many quarts did you get back in? I got in 7.7 and my Haynes manual (and maybe the CD too) said it should take about 9.5. Maybe I didn't get the heater drained?

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TomO
94 E320 Wagon, 170k, totalled in 2006
2002 BMW 525i Wagon, 75k
1991 BMW 318is (two of 'em)