I was given a car cover from a friend. He bought it for his Mercedes, but drives it everyday, and has never used it. He lost the instructions.

What do I need to know?
How long can I leave it on?
What do I do if/ when it rains?

The material appearsd to be polylropelene with needle punches all thru it.

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1982 300SD " Wotan" ..On the road as of Jan 8, 2007 with Historic Tags