91 300 SE Where to lift.

[milterino]

I have a 91 300 SE (126 body) that I have just bought. I have not been able to locate the repair manual C.D.s as yet. My question is where are you supposed to support the car when raising it on a lift? Underneath there are 4 nubs with a rubber covering which it looks like someone has used to lift it. The body under the two front ones has crushed from the pressure. On my 71 450sel I use the unibody rail in front and back. This 126 has a couple of spots in front which are adequate but no obvious locations in the rear. How do I do it? Milterino.