The valvetrain on the N52 introduced in 2006, used 5 mm valve stems on both
the intake and exhaust. To
increase durability, the exhaust valve stems were increased to 6 mm from 6/06
production.
All of the new NG6 engine have adopted the 6 mm valve stem for the exhaust, the
intake stem remains at
Principle
A camera that monitors driver activity is located
in the instrument cluster. The camera evaluates
the head position and eye opening and uses the data to analyze the attention of
the driver. This
system supports various vehicle assistance systems,
e.g.:
Fatigue alert.
Steering and traff