Let the record reflect that I was actually helpful once in my life...:

CNC7050 G48 Glysantin Coolant Undiluted 5 Liters | eBay

(BASF Glysantin G48 is the same thing as Zerex G48)

(but you can get a gallon of BMW coolant for $30)

__________________
1968 220D, w115, /8, OM615, Automatic transmission.
My 1987 300TD wagon was sold and my 2003 W210 E320 wagon was totaled (sheds tear).