A while back I did a write up about servicing the front wheel bearings on our 107's. That was pretty much a standard wheel bearing service procedure that anyone who took a high school shop class (remember when they had those) would be familiar with, with the exceptions of the few twist added for Mercedes. That thread is available here:
Today I'm working on the rear wheel bearings, which are completely different. These are a cross between a standard front wheel bearing and a differential pinion bearing of the 1980's vintage. In fact this week is the first time I ever did this job, (which is not done yet)
To start with you will need to remove the rear wheel, caliper and rotor.
For the 560SL I had to completely remove the axle. According to the manual you don't have to remove the axle you can just remove the center bolt at the hub and push it all the way in, disengage it from the hub and wire it up out of the way. The manual was written for the earlier 107's so hopefully that is true, other wise that would really suck.
So in any case with wheels calipers rotors and axles out of the way we begin. We are now ready to remove the hub flange. Of course this will require a Mercedes special tool. Fortunately Sunex makes one tool number 10203, and it is available from various sources for under $20.00. It does look kind of fragile but I was able to use an impact wrench on it, not that you should have to but if you need to it worked for me. See the first pic.
You will need to react the load on the hub when removing the nut. This can be done with another MB special tool that cost about $500 or you can use two lug nuts and a pry bar like I did, see pic #2.
The nut in question is the slotted nut shown in pic #3. The special tool pilots into the center spline area and the tangs engage the nut. Make sure the slots in the nut are cleaned out good so that the tool engages all the way down. Also notice the nut has deform-able tangs that need to be bent clear of the threads before proceeding. Those can be bent out of the way with a drift punch and hammer. So with the nut clean and tabs bent out of the way, react the load as shown in picture 2 and remove the nut. It should come off without an impact gun, but if you need one use it very carefully.
More to come