Exhaust Residue ??
We are in the PAI stage of a purchase on a 2005 Sportscoach Elite 401TS... So far all things are checking out good but upon looking at the Rear Bedroom Closet we noticed what appears to be a Black S...
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From what you're describing, it sounds like diesel exhaust. You're also only finding it on the driver's side where the exhaust system is located. The bulk of the exhaust components, turbo, and exhaust brake are all on the driver's side. Check closely around these components for cracks or leaks.
