what is item 71 made of? plain fabric type insulation or something like whats stuck to the floor originally?

currently my car has none, and I can ring the rear quarter panels like a tuning fork.

Attached Thumbnails

 

__________________
2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)

For cars in general, this kind of stuff is 1/8" thick tar / rubber paper glued to the metal. Take a look at stereo shops, this kind of stuff is usually sold there.

JC Whitney sells that stuff I think.

__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

If you don't mind saving some money, go to your local home depot or such and buy a roll of "Grace ice and water shield", used on foundations and roofs, works great as sound deading material. Also, some of the newer window tape is made of this same materail. Lowes sells a "Pella" brand, it's less thick but would do the job.

Attached Thumbnails

 

so its just basically dynamat sheet - by looking at the diagram it seemed like a piece of fabric insulation - the EPC only calls it insulation (other bits are tagged with thermoplastic adhesive)

__________________
2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)