I am awaiting my Merc bushes, but you need two each side both for the outer spring pan, and for the outer shocker arm. We are still trying to locate some inners, although so far on mine it is only the outers that gone dry! I found the best way to get them out was to hacksaw through from middle to either casting or springpan, and then with loads of penetrating oil push them out with a 6 inch vice....still got to get the new ones back in. Just to go belt and braces I did remove the rubber gaitors from both sides of the inners - very tricky job with small screwdriver - be careful not to puncture the rubber. Then cleaned them out and re-packed with grease - then the fun bit getting the spring clips back on - done three bearings so far, so some way to go!