Accumulators or actuators?
If the recirc actuators, the ones behind the glove box, are shot, the rest aren't far behind. Search the archives for the pros and cons of rebuilding vs replacing.
www.autoluxmbz.com has a tool to take actuators apart without breaking the retaining tabs. You don't need this tool if you're replacing the actuators.
Sixto
95 S420
87 300SDL