You cannot run such tall tires (45) on an 18 inch rim on an e36. That's even too tall for 17s. For 18s I think the proper size is 35 or even 30. As for the width, those are getting a little too wise as well.
Short answer is no, those like that will not fit.
1998 BMW 328is - summer
1994 BMW 325i - daily
1992 BMW 325i - totaled
1988 Mercedes Benz 190E 2.3-8V - sold