From a technicians point of view, junking top quality systems like load leveling because you can't understand it or afford it is a sorry excuse.
That system is as durable and maintenance free as it gets. The only thing that needs replacement is the accumulators. If you drive a few years with them dead you can beat the seals out of the shocks/struts and possibly the level valve. The same system is on every station wagon.
I would see your local MB junk yard (let me know if you don't have one) and grab all the pieces missing except the acculmulators (those should be bought new as they are perishable - mercedesshop should be able to help there # 123 320 02 15 MB list $130)
Owner 24 bay BSC
Bosch Master, ASE master L1
26 years MB technician
[This message has been edited by stevebfl (edited 03-31-2000).]