This tool can be had for much less than $600. Personally, I think it is outrageous that anyone would charge that price for such a simple tool. I guess that if you tack the Mercedes Benz name onto to something you can charge what you like for the item. You could check with Snap On. They have a universal compressor for about $150 or so. I am sure there are other sources for this tool as well. Check this URL. This type of tool will work fine on MBZ springs.
http://sktoolstore.com/kd/kdsusp01.html
[Edited by jeffsr on 03-23-2001 at 06:01 PM]