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From MBUSA. Parent's ML drinks oil and brought it to the dealer's attention. They printed out something stating that 1qt/1000 miles is within operating specs as well as printed this on the invoice.
+1 on what bumpnzx3 said.
1qt/1,000 (one thousand) miles . Requirement oil change interval is 10,000 so after 6,000 miles (m271 engine) then you'd be out of oil.