Mercedes-Benz 190 E 2.6 1989 Owner's Manual page 76

il dipstick
il filler cap
74
Engine Oil Level Check
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 the engine.
For viscosity and capacity, see " Fuels,
Coolants, Lubricants, etc." and last
page.
For low engine oil level indicator lamp,
see page 67.