Close to the same happened to me with my w126.
Flicker alerted me to the need of
2 quarts.
Some filks claim the light goes on
when you reach zero, like that riddle:
what time is it when an elephant
sits on your fence?
Time to get a new fence.

__________________
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