KASZ, many of our cars came with Style 18 wheels. If you look at
the chart on the bmwstylewheels.com for Style 18 wheels, it shows these have an offset (ET) of 46 or 47 depending if you have 15" or 16" wheels.
The same site
shows Style 29 wheels where used on 3 series, 5 series, and Z3 BMWs. It only lists the ET for the E34 5 series, and that's an ET of 20. You'll have to inspect the size cast on the back of the wheel to know for sure what you have.
Using
this guide, it explains when the wheels have have a smaller offset, they will stick out further because it creates a negative offset. These may work, or they may rub on the fenders.