Alignment measurements are divided into degrees, minutes (') and seconds (" ). The seconds measurement is so tiny it is practically useless in a normal alignment, but the minutes (1/60th of a degree) is a usable figure. That figure you quoted is 18 minutes, plus or minus 8 minutes, is the ideal alignment and the range of tolerance.
Quotes to live by:
guessing gets expensive
nothing is more expensive than a cheap BMW
buying a ratty example (of a BMW) is a parasitic relationship.(and you ain't the mosquito)
Ken Kanne, Silverhill, AL, E36 Forum Mod/Craigslist addict/Hoarder of all sorts of stuff
1995 318is "Bebe"; 1993 325is "Elvira"; 1985 635CSi "Katja"; 1984 633CSi "Sylvia"; 1987 325is "Odette"
Last edited by hornhospital; 12-25-2012 at 04:27 PM.