dowel pin also holds on starter
on my 2000 528, along with the two bolts holding the starter on there is also a dowel pin about 3/8 of an inch long that comes off the tranny housing between the two bolts. the bolts are easy to take out but the dowel pin can be a real bitch. i was able to reach in from the top and wedge a flat head screwdriver in there to slowly work the two pieces apart. good luck.