I need a new trunk emblem for my 85 300SD. I need to know what chassis I have. When I decode my vin a get this 1261201A169803 as my chassis. When I go to order it, the chassis range options are A-194021 and A-194022-. Which one is the chassis for my vehicle?

It appears that you want the earlier one:

http://catalog.eautopartscatalog.com/mercedesshop/sophio/quote.jsp?clientid=catalog.mercedesshop&cookieid=1CQ0J3JZ41VW014AYR&baseurl=http://catalog.peachparts.com/&partner=mercedesshop&year=1985&product=O5010-16679&application=000023327

because your vin number (last 6 digits) is below "A-194021." If you're not sure, call Phil with your vin number and he'll make sure you get the correct part.

There's a different badge for early and late 85 300SDs???

Sixto
93 300SD