Hmm. I don't know what Sprinter you intended it for but this doesn't seem out of line, unless Hein is a crook just looking to sell extra insulation to the unwitting. The DIYvan site recommends 50 linear feet of SML600 for "144 WB Sprinter,148 WB Ford Transit with slider window & window in back doors".
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2018 Hymer Aktiv 2.0 (Ecotrek replaced)
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