Mercedes-Benz 300 SE Operator's Manual page 136

Fuels , Coolants, Lubricants etc. - Capacities
Vehicle components and their respective lubricants must match
.
Therefore use only brands tested and recommended by us.
Inquire at your authorized Mercedes-Benz dealer.
Engine with oil filter
Automatic transmission
Model Capacity
300 SE 7.5 l (7.9 US qt)
400 SEL 8.0 l (8.5 US qt)
500 SEL
SEL 300 Initial fill: 7.1 l (7.5 US qt)
Fluid change: 6.0l US qt 6.3
SEL 500 Initial fill: 8.6 l (9.1 US qt)
SEL 600 Fluid change: 7.7l US qt 8.1
Fuels, coolants, lubricants etc.
Recommended engine oils
Automatic transmission fluid
136