Mercedes-Benz 350 SDL Owner's Manual page 72

1 Oil dipstick
2 Oil filler cap
70
Checking Engine Oil Level
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 check­
ing.
Add oil, if needed, only
to the upper mark (max).
Do not overfill the
engine.
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For viscosity and capacity, see "Fuels,
Coolants, Lubricants, etc." page 100.
For low engine oil level warning lamp,
see page 60.