Silber-grun is the colour commonly (incorrectly) called thistle green.
861 silber-grun was available on W116's up till 1979.
881 silberdistel (thistle green) is a different (but similar) colour available from 1979 to 1986.
I don't think german build 116's were supplied in 881, though I do think it was available on CDA cars.
Anyhow, this is 881 :
Its greener than 861, and I would say it is the colour of your car pompy.
You can confirm by looking at the VIN on the firewall. On CDA cars oyu see the VIN followed by the CDA build number followed by the three digit paint code. CDA cars lack the 'options' plate found on german bild cars.