That will not help you much.
Maybe you check first of all if you have all these items onboard
http://www.realoem.com/bmw/showparts...57&hg=66&fg=20
Next is to check the wiring diagrams based on your car model and year. They are usually available on my website.
Please tell us what is missing.
Also clearly state month and year the car is produced. 92/525i/M50 is not clear enough. It can be a 1992 modell= from 09/1991 or produced in December 1992.
VIN decoder is on my page or if you look at Johan and Sean's page under miscellaneous links.
Do not be surprised, my car was produced exactly on November 17, 1988 and was first registered in 12/1989.
There are big differences in design and in options depending on the month of production, especially when they are produced in the month (s) of fecalift upgrade.
Best is you drive to the dealer and ask for a print out of the car's options.