There is clearly an MB parts number on the shock(s), just below the Bilstein label:
109 326 02 00.
Don't know whatever reason the person had to put them in (your car) but as Stick mentioned,
those are for the W109 or W108, not for the Pagoda.
Basically you can fit together a lot of MB parts anywhere - but that doesn't make it correct or so only because it physically fits ....
Just kick them out and get the proper (Bilstein) ones.
Just my 2 cents....
A.