The bolts on your steering damper are likely rusty and seized. You will have to soak them in liquid wrench or something like that and then give it a try. It is not unusual for this to happen. When you say exhaust hangers do you mean the rubber things? YOu have to carefully stretch them, I've never heard of one breaking, it should be straightforward.
1995 E420 - retired
1986 420SEL - retired