The reason your compression is low is because you have a blown haedgasket or a cracked or warped head. Usually when you have 2 cylinders low on compression right next each other its either a cracked/warped head or a bad headgasket.

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1985 300TD Turbo Euro-wagon
1979 280CE 225,200 miles
1985 300D Turbo 264,000 miles
1976 240D 190,000 miles
1979 300TD 220,000

GONE but not forgotten
1976 300D 195,300 miles
1983 300D Turbo 175,000 miles

http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg