Had a previous post that stated I was changing out the upper control arms, lower ball joints, rotors and brake pads on the front of a 1985 300SD. I managed to shuffle the bearings while cleaning them and for a while, lost track of where they came from. IE: left or right side of car.... I was able to retrace my tracks by some identification on both the bearings and races.... BUT decided to order new bearings and races anyway.... They didn't look all that great and figured if I am doing all this other work, might as well change out the bearings as well...

While waiting for the new bearings, I installed the new upper control arms. Bushings were not quite right. Had to ream them out in order for the bolt to pass through them without resistance... Was tempted to use the old bushings and rubber surrounds but found the right size drill bit to open up the holes. Can't believe they were so far off.

Lower ball joints were knocked out and replaced at an independent shop.

I got everything back in place and cleaned up the calipers. The calipers had no wear sensors when I dismantled things the other day. While looking around I noticed some severed wires hanging down from the wheel wells. Light gauge wire, I suspect that they were to go to the pad sensors.

Do I need wear pad sensors? Been driving the car for 2+ years without them...

A whole different topic. What is the cylindrical part that gets pushed through the knuckle and is held by a 5mm socket cap screw. It has a small "slotted head" that faces the backside of the hub? It has a wire attached to it and has a secondary fastening point at about 10 o'clock on the rotor guard... passenger side, that is.

__________________
1985 300SD