I have a 93 M104, but not the exact same as yours. Is your problem how to get the bolts loose without damaging the pulley? If so, use an old belt from a car or one of your own old ones - leather works best if using personal belt. Just wrap it around the pulley and pull it tight to create a pinch-point on the belt in the opposite direction you are turning the bolts. Hope that was what you were looking for. Good luck.