why do you want to know about the pressure switch? its best that you dont get involved in messing with the AC. Anyways the A/C Pressure Switch On- right side of engine compartment-
triple A that is AAA workshop has done a few paint jobs on my relatives car and he is very impressed with the work. Try them and im sure you will like what you will see later
changing the bearin is one big work which may take you entire day almost. what i suggest is change all the bearing as this is a wear and tear part of the car and a very important too so if you are going to pay for the labor might as well make good use of it.
well the best thing will be that you can take one of the mechanics for a drive as him to drive and he will then believe what you are saying.
it can be a faulty steering dampers a shock that crosses from left to right connecting to tie rod ends that if its not working it will vibrate the tires a lot.
all the best