I'll just do the same as I do with any big job...Lots of ziplocks, and for this case, lots of labeling tape. I'll put a step # and what it goes to that way I go backwards upon reinstall and never miss anything.

I thought I heard the heater cores leak too after a while? Maybe I read wrong? Obviously that would be good news as a new core is ~$250 and that would cut the cost of the repair in half practically.

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k