Wow - that's crazy! Hopefully nothing was damaged when the diff fell out. Yikes.
About the AMG kit, yes, please take more photos when you have a chance. That sounds like very cool stuff. Also, if you could post the part numbers, I can check what application they were designed for. See if there's a part number stamped on the bottom coil of the springs. I saw a new-in-box AMG kit for sale recently, but it was for 4-cylinder 124's... the springs would have been way too weak for our heavy 6-cyl models. I have never heard of adjustable Bilsteins... wow!! Any idea how many miles were on the kit? Oh, and as Jonathan mentioned, are any other AMG goodies available?