http://www.peachparts.com/shopforum/showthread.php?t=166423

Anthony check out the thread above, or if that won't work, do a search under. "MB rubber jack points don't match w/ sears jack stands at all"
look for the pictures I shot in that thread, I post under the name Ethan.

I felt that was a very safe way to support my car, I purchased the jack stands especially for thw way the flat tops work with the cars rubber support points.

To get the car up high enought to insert the jack stands required two garage jacks and some very hard wood spacers to sandwhich between hydraulic jack top and sub-frame pick-up point. I gently raised each side a few cm's until the front of the car allowed the jack stands to get into place.

My hydraulic jacks were rated at 2.1/4 ton and 1.5 tons but I wish I had two six ton jacks, my jack weren't confidence inspiring at all. However my jack stands were excellent - I think each stand was rated at 6600 lbs and with all four jacks in place, as shown in the picture, when I replaced my steering knuckle things were very secure.