Try to search something different in this manual:
service interval reset, mirror controls, timing belt, language, change language, OBD port, jump start, door lock
Or view whole manual here:
View, print and download for free: auxiliary battery - BMW 320i 1981 E21 M20 Engine Workshop Manual, 121 Pages, PDF Size: 22.48 MB. Search in BMW 320i 1981 E21 M20 Engine Workshop Manual online. CarManualsOnline.info is the largest online database of car user manuals. BMW 320i 1981 E21 M20 Engine Workshop Manual PDF Download.
All product names, logos, and brands are property of their respective owners.