Check out this link from the technical manual "data codes - options"
http://www.bekkoame.ne.jp/~mtor/mbcodedsc.htmlI also have a code book put together by the German group some time ago.
202 has two listings "EINFAHRANWEISUNG DEUTSCH (KUNDENDIENSTHEFT + BETRIEBSANWEISUNG) 1FEB63 TO 28FEB63 (operating care instructions book)
next is "REIFENDRUCKSHILD UND HINWEISSCHILD FUER VERDECKBEHANDLUNG - 1SEP63 TO 30NOV63(note and plate for roof treatment)
For 233
There are several listings
First is for rear axle with 1:4.08 miles (sort of guessing on that) 1OCT 63 to 30 Nov 66
second is NEBELSCHEINWERFERSCHALTUNG - FRANKREICH/USA 1 DEC 66 TO 30NOV69 (fog lamp circuit for France)
third is NEBELSCHEINWERFER-SONDER SCHALTUNG FRANKRIECH, SCHWEIZ, AUSTRALIEN, SCHWEDEN, NORWEGEN (Foglight special circuit) 1 Dec 69 to 31 Jul 1992
Translations from Google, and they missed the first words in each of the 202 ones listed above. I think I have them spelled correctly (I apologize to my German friends if I transposed something and the translation of my mistake is not so nice!)