Newly Rebuilt as you can see still in the unopened box through Mercedes Classic Center is this Boge hydrocompensator for the W108 and W111 280Se and 3.5. Optional on the W113.

These are now rebuilt by ZF that merged with Boge.
Mercedes now charges $3570 before the core credit.

Do not hit and buy it now without reading! This is being sold with a core exchange only. Mercedes does not sell and rebuild them unless you have a core to exchange.
If you have a core that needs to be rebuilt I will trade you so if you don’t want to wait for Mercedes to do it, which can take months, Make the purchase and send in your core and after I receive it I will ship the new one and issue a $600 credit.

If you do not have a core I have a source for a used one. Ask me for it as I will have to make a listing.