Mercedes-Benz 300 SL Operator's Manual page 100

300 SL
Checking Engine Oil Level
1 Oil dipstick
2 Oil filler cap
500 SL
The best time to check the engine
oil level is when the oil is warm, such
as during a fuel stop.
With the vehicle on level ground, stop
the engine and wait a few minutes for
the oil to drain back to the oil pan.
Wipe the dipstick clean before
checking.
Add oil, if needed, only to
the upper mark (max).
Do not overfill engine.
For viscosity and capacity, see
"Fuels, Coolants, Lubricants, etc. in
Index.
For low engine oil level warning lamp,
see Index.
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