For 520i and 528i: Check oil level
The concept
The oil level is monitored electronically during driving and shown on the Control Display.
If the oil level reaches the minimum level, a check control message is displayed.
Displaying the oil level
1. "Vehicle Info"
2. "Vehicle status"
3. 
"Engine oil level"
Possible messages
▷ "Engine oil level OK"
▷ "Engine oil at minimum. Add 1 quart of
engine oil!"
Within the next 125 miles/200 km, a maximum
of 1 US quart/liter oil.
▷ "Engine oil level below minimum. Add 1
quart!"
Immediately add 1 US quart/liter of oil.
Detailed measurement
Requirements:
▷ Vehicle is on a level road and the engine is
running at operating temperature.
▷ Manual transmission: Shift lever in neutral
position clutch and gas pedal not depressed.
▷ Automatic transmission: Selector lever in
transmission position N or P and gas pedal
not depressed.
In order to perform a detailed measurement of the engine oil level:
1. "Vehicle Info"
2. "Vehicle status"
3. 
"Measure engine oil level"
4. "Start measurement"
The oil level is checked and displayed via a scale.
During the detailed measurement, the idle speed is increased somewhat.
Duration: approx. 1 minute.
See also:
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...
The concept
This system projects important information into
the driver's field of vision, e.g., the speed.
In this way, the driver can get information without
averting his or her eyes from the road. ...