Anthony, expect to add 10.5 qt. of mix to an empty system. This is the spec in the Chilton's book

The tips were on the button. Sometimes air gets trapped and gives false reading.

So, if you don't mind me asking, did you buy a 240D after you bade farewell to your 300D wagon?

Give some description of it!

__________________
1979 300D 220 K miles
1995 C280 109 K miles
1992 Cadillac Eldorado Touring Coupe 57K miles SOLD
********************
1979 240D 140Kmiles (bought for parents) *SOLD.
SAN FRANCISCO/(*San Diego)
1989 300SE 148 K miles *SOLD