Anyone know the coolant capacity for the M103 3.0L engine in a 90 300E ?

.....am at work and don't have the manual with me. Need to by coolant on the way home.

__________________
Andy_M
'98 W140 S320 Black/Black
'06 W164 ML500 AMG White/Grey
'03 Porsche 986 Midnight Blue/Grey