巡航定速
Cruise control, an 'on-board computer' (to display trip information) and a "check control" panel (to alert the driver about fluid levels and lighting faults) were introduced to the 5 Series on the E28. The glazing is made of single-pane safety glass, the windscreen has laminated glass. As part of developing the air-conditioning system for the E28, several of the BMW engineers in charge of this program drove a previous generation E12 5 Series during the middle of summer in Texas. The E12 528i was painted black with a black interior, and driven in one day.