Crossword puzzle clue "mid earth line"

Mid-Earth line

Mid-century filling option in the mid-Atlantic

It usually ranges from the mid-sixties to the mid-seventies

Je ne sais quoi capturing mid-14th to mid-17th century China?

Mid-luxury Mercedes-Benz line

Add vertical line 13 (word 3) and vertical line 3 (word 1) together and enter the answer to the resulting clue on this line

Add vertical line 9 (word 2) and vertical line 7 (word 2) and enter the answer to the resulting clue on this line

Add vertical line 1 (word 1) and vertical line 15 (word 3) and enter the answer to the resulting clue on this line