See also:

Active head restraint
In the event of a rear-end collision with a certain severity, the active head restraint automatically reduces the distance from the head. Reduced protective function ▷ Do not use seat or ...

Safety
Besides options like lane departure warning, the 5 Series comes equipped with a suite of side curtain airbags and front-seat side-impact airbags. Rear seat-mounted airbags can be ordered as a $385 ...

Diesel particulate filter
Soot particles are collected in the diesel particulate filter and periodically burned away at high temperatures. During the cleaning period of several minutes: ▷ The engine may temporarily ...