It looks like this BMW 7-series prototype has some plumbing issues. We don't know what to make of this test, which has yards of tubing emanating from the engine and apparently being routed to a collection device in the front seat. It looks like a Bavarian Shop Vac from hell, but we suspect there is something a bit more technologically advanced going on. Sadly, that's the extent of our knowledge on just what's being tested here. Source: KGP